Rough Idle On Startup


When you engage into drive it pulses, or jerks a little until it gets warm and then its fine. This is a discussion on rough idle at start up within the General Help forums, part of the LSx Technical Help Section category; I just rebuilt my ls1 and at start up the idle is around 250-500rpm. Any help with this would be appreciated. Upon Cold Start up: sometimes it will idle/sputter from 1,000-1300 rpm range. hey guys new to the site just bought a 96 ford ranger XLT 4x4 with the 4. On startup,tend to go away after engine warms up. Define rough? RPM's surging up & down, shaking? what happens when you gas it a few times & then let it sit a sec? Mine has a little surge on cold start up, I just let it idle for 2 minutes & then drive off. Are there any mechanical sounds from the engine ( clicking, etc ). However if I drive around and let the engine heat up, then restart it, I get a rough idle for about 30 seconds. Replaced: spark plugs, spark plug wires, fuel filter, IAC Cleaned: MAF sensor, throttle body Read online that it could maybe be the EGR valve. In those cases, the car will be running rough and drivers can smell a raw fuel smell. Its not real bad or anything but it is noticeable to me anyway. A bad hose in any part of the engine is easy to fix. 3l gdi engine When addressing a customer complaint of rough idle, which occurs only on the first start of the day and last s for 30-45 seconds, check for the possibility of poor injector performance in a particular cylinder. 2007 Ford Fusion rough idle at start up. Immediately upon first start up, the car was running smooth. However, if it reacts to this then odds are it's the intake gaskets. The rough engine RPM only happens at idle. On startup, the engine runs very rough until I press on the gas and rev the engine for a few seconds. A bad hose in any part of the engine is easy to fix. Also blew some oily smoke on startup, but that ended in 30 seconds or so. Recently had fuel injector #2 replaced. Rough Idle on Startup. Ive been having some problems with my 95 gst. Rough idle Chevy 4. I do agree that it is probably in the governor! There is also a c shaped spring under the plate at the end of the cam shaft. HOWEVERwhen starting cold, if it gets the least bit cold outside 20 degree F or less) the idle goes rough and if I give it gas it stalls. The solution is two fold, one is to clean and inspect every connector (including the big one near the lift pump) and degrease/grease them with the right dielectric grease. Learn more about Chevrolet Equinox at the Edmunds. I got to and from work just fine, but while letting the car idle in the parking spot of my apartment for a minute before shutting off the engine the check engine light finally came on. During that time, if I try to drive. It only does it when its cold though. They may also exhibit a hesitation or surge at a steady cruising speed. once it has been started once in a day the cast iron block and head, will hold enough heat/warmth to keep the injectors/fuel warm enough to not need preheating at all. More smoke than there used to be on start up before the rough idle. For some reason when I turn the rover on it is very rough. It seems OK after the car is run for 15 to 30 seconds if I step on the gas and bring the RPMs up to about 12 to 15 hundred and then take my foot off the throttle and let it idle. It gradually smooths out, and if I drive around and stop at a light, it will idle just fine. Store > Fuel Delivery Products. Rough idle at start up Discussion in 'Performance' started by Tdub, Dec 13, 2009. It fired up and had none of the idle or warm start issues I had when I scaled the injectors. Would not run at idle; had to keep it about 2000 RPM just to run. If you have a 2010-2011 Ford F150 hard to start issue or a Ford F150 rough idle and stalling along with a P1450 trouble code, usually following a gas fill-up. things leak. Actually I started noticing an intermittent rough idle at startup for some time prior to the white smoke. On some of these rough idles after first starting my car I notice that the ecu retards timing till after the idle smoothes out. 3 rough idle and dark cold start exhaust. So I put a bottle of techron in the gas tank. On one occasion it stalled. I am looking for a vacuum leak and I cleaned off the IACV. Ive been having some problems with my 95 gst. Rough idle/cold start code on my 2014 Chev Silverado for the second time now. Rough idle and misfire from cold start Just got a Jetta again - 2010 Limited Edition just shy of 100K miles and I've got one problem with it. No rough idle at start up. Re: Check Engine Light and Rough Idle Thanks for the input. Spark plugs create the spark that is needed for your car to burn fuel. Filters, have you changed your fuel and air filters lately. Just changed my fuel pump on my 95 chevy cause it was runinng very badly So now it runs fine Only problem is at startup the idle is very low but after a few seconds it idle perfectly. i saw you have mentioned you replaced that sensor. It only does this when the engine is cold, and only does this for about 30 seconds at the most, then everything goes back to normal and it runs smooth. Cleaning out the carburetor to remove carbon deposits is probably a good place to start. I have a 1998 Stratus 2. Rough idle on warm startup, dsg stalling - posted in General Chat: Hey guys, recently bought a mk5 55plate dsg. I have a 97 runner 5vz with 192,000 on the clock. When I start. I've had my new Ody for a month now, and the engine seems rough on cold startup. Rough idle Ford Focus hesitation surge Fix rough idle hesitation surge Ford Focus TSB 07-10-7. For a while I have noticed a rough idle upon starting the truck for. (normal idle for all celica's upon cold start is 1300 rpm for the first 30 sec). As the revs start to drop down the engine has a couple of splutters, not stalling though, and then runs as normal. When you engage into drive it pulses, or jerks a little until it gets warm and then its fine. 0L OHV Vulcan engine, I had the "Hot soak start rough idle" intermittent issue. Rough Idle on Startup. Hi there, I am having the same issues as you. I have taken in to a shop where they fixed the problem, but it reappeared a week or so later. A BMW E60 rough idle repair is an easy procedure that is usually caused by a bad DISA or idle control valve on the intake manifold of the car. Would not run at idle; had to keep it about 2000 RPM just to run. It does not sound like a huge lope but is a noticable different than it was before. Sometimes after I rev the engine a few times the car will suddenly idle normaly and run just fine. If your engine is carbed it most likely will have a Thermal Air Valve on the odd cylinder bank. After refueling, I had to crank the engine over for maybe 5 seconds when the engine usually starts right away. i have a 94 ranger and when i start it up the idle seems to want to die i guess you would call it surging? It jumps from about 250-500 rpm i don't know how else to describe it. Start driving, runs fine, idles fine at stop lights, etc. From a cold start, usually in the morning, the 1st 10-15 seconds run rough before settling down to idle. She would turn on engine when cold and would run rough. Once it warms up it purrs like a kitten. Start driving, runs fine, idles fine at stop lights, etc. I would always start with cleaning the throttle body. On cold start up, the idle is surging from near stalling to 1200 and back repeatedly. Cold Start- Rough Idle (long!!!) At some point during the month of August the Roadfly forums are going to become archive only. Would not run at idle; had to keep it about 2000 RPM just to run. Rough Idle on Startup. If you're experiencing a rough idle in an older vehicle with a carbureted engine, the process is a little different. 8 it tends to have a bit of a rough idle as the warming up process moves through its stages. It does not sound like a huge lope but is a noticable different than it was before. What year is you're 123. I used the hole can in 1/3 incriments and didnt notice a huge change until the 3rd try. In the first 5-20 seconds the engine idles really rough but evens out and runs fine especially once I give it a little gas. Rough Idle. That said, if you suspect that the plugs, wires & cap are OEM, that would be the place to start. After about a minute or so the idle steadies itself and everything is normal. AFter warning up, idle smooths out. Rough idle/cold start code on my 2014 Chev Silverado for the second time now. Yes, the oil cap was loose Which causes the engine to lose vacuum (rough idle). A broad range of problems can cause rough idling in a motorcycle engine. No engine light and no code/cel. rough idle after cold start on 3. They seem to occur for no apparent reason. A lot of time the connectors which are supposed to be sealed upon crimping, fail and the ecm sees the fuel pressure vary during idle hence rough idle and sometimes no starts. 7 Sport with 48K miles. Being horizontally opposed it causes the engine to gently shake right and left. What could it be? it could be a problem about EVAP purge valve? How can I check it? My mustang is a 2017 Ecoboost stock. I'll give it another 3 weeks then it'll go back to gurgling. When I first start it in the morning it seems to have a rough idle. It's warmed back up here over the past week and the issue hasn't occured again. Being horizontally opposed it causes the engine to gently shake right and left. If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine. Higher than nromal water pressure at idle can cause a rough idle condition also. when approaching a junction and seeing the coast is clear). When I start my car it will run very rough. Cold engine, 50-90°F - almost stalls. You might think it is normal, but that is the engine misfiring and pushing raw fuel out. Rough idle at startup 10 Answers. The seat fit good and the float was level with the bowl and reasembeled and reinstalled back on the engine. A common cause of an engine running rough is faulty ignition timing. I can drive 2 miles to a stop sign and it idles normal at about 700 and is fine there after as long as its warm. I had a rough idle on startup one day and didn't think much about it. Hey guys, Im having a rough idle on my 99 Grand-AM (2. The car runs great after start up, accelerating right away and smoothly. First issue was at 84,000km. Hello, Car is a 1990 ls400. I am thinking it is either the ignition coil or the head gasket. Components in the fuel, ignition, emission and other systems should work correctly. I am thankful for this community and again a huge shout-out to sstroudwku. Rough idle after cold start Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine. then when I changed over to 98 it started to be rough on the cold startup , Maybe your onto something there. When I connect my Enginuity scan tool, it confirms that the engine goes into Idle when the rough RPM occurs. So the engine could be running lean or rich at start up because of over compensation due to the in-effective cat, perhaps until it warms up. Of course the problem is intermittant. First I will show you a video of such a rough idle and then list the possible problems that may cause that. So for the past few weeks I have been trying to diagnose a rough idle that has developed on my 99 2. I have no engine light so not sure if any codes are in the computer. Rough Idle - Cylinder 3 Misfire - Just can't figure out the problem. Subject: Rough idle on first start IP: Logged Message: I've got a 2000 4. I had a rough idle on startup one day and didn't think much about it. The idle should pick up momentarily right after spraying the brake cleaner. You might think it is normal, but that is the engine misfiring and pushing raw fuel out. Recently replaced coil, around 2 years ago. Hi there, I am having the same issues as you. The low fuel light was not on and the car ran fine. For a while I have noticed a rough idle upon starting the truck for. It seems OK after the car is run for 15 to 30 seconds if I step on the gas and bring the RPMs up to about 12 to 15 hundred and then take my foot off the throttle and let it idle. It ran so rough yesterday that it tripped the CE light. I have taken in to a shop where they fixed the problem, but it reappeared a week or so later. Car is all stock, nothing done to it, runs great, just has a rough idle on cold startup. I've been having an issue for the last couple months, and it seems to be getting worse. hey guys new to the site just bought a 96 ford ranger XLT 4x4 with the 4. Trouble Starting and Rough Idle on Start Up. My 13 pro gets into this rough slow idle on start up, after it is warmed up. The rough idle Haynes on mine too. 5 accompanied with noticeable engine vibration (and sometimes Check Engine Soon flashing), then remove valve covers on both banks. 4 V-6 with 72K. All 8 injectors were replaced under warranty June 2016. I repaired it in 45 minutes for under $5. Seemed to be missing spark, intermittently. Thought it was a coil pack, EGR valve. As far as I can tell, it seems like there is a fix regarding the #3 injector which I plan on doing at some point. Computer still shows code P0300, which refers to multiple misfires. It's generally located on the throttle body and in the case of my 2000 Dodge Ram 5. It seems to do it more consistently from a cold start but it is really random and doesn't always do it and sometimes will on a warm start too. It's not hard to start, but the idle is pretty rough for a minute, until it warms up. First issue was at 84,000km. So the past couple months I've noticed my truck has a really rough idle in the mornings when it is cold out, to the point where it has even died before. I have also read that rough idle on start up is common on these cars. Rough Idle on Startup. In those cases, the car will be running rough and drivers can smell a raw fuel smell. super rough ride from the back of the truck Recommendations needed for new Low idle at start up. No code was set, but she ran terribly, with no power, major misfires, and an occasional backfire. The low fuel light was not on and the car ran fine. From a cold start, usually in the morning, the 1st 10-15 seconds run rough before settling down to idle. Plenum is attatched to manifold and mounts up to the crossover housing. 7 Sport with 48K miles. Hi Everyone Please help - Sometimes when I start the D3 in the mornings she has a rough idle for +/-30 sec then she's fine. Rough idle on start up Any time I start the car, there is a period of 5 - 10 min of a rough idle, try to give it gas and does nothing, car doesn"t go. This along with a timing advance raises idle speed. Not sure if this could affect it but the car was ran with the MAF disabled for. Rough idle Chevy 4. Hello! Bought a second hand 2010 X5 30d with 120K kms, car runs great and very happy with it, love it actually. Could this be a sensor problem? I did a tune up (new plugs & wires & air filter) and still did it. first start up, the car has been sitting over night so everything in the engine is at ambient temperature. Re: Rough cold startup I suspect you have one or more fuel injectors that are defective and/or sticking. I'm having the common issue on my TJ of a really rough idle after startup when the engine is heat-soaked. Motorcycle manufacturer recommendations vary,. 0 v6 and the 5 speed man* it idles pretty rough at start up (loping at about 500 rpms) but after a couople of minutes it stops and idles at about 1000 rpms with no issuses. I have just purchased my own licence of HP Tuners, so I will scan and log my startup and post when I can. If the PCM receives an inaccurate engine temperature signal at cold start-up, a rough idle may be created from. This is only on initial start whether the weather is hot or cold. Watch how I fix a rough idle on my 2002 Ford Explorer Sport Trac! It had a vacuum leak caused by a weathered emission hose. No CLE or other indicator lights. So far as the rough idle goes, (I cant say about the speedo) I'm going to hazard a guess you have a problem with the Idle Air Control Valve or some call it Idle Air Motor. Subsequent starts throughout the day are OK. 2L that has been dyno tuned and as of the last few days I have had a rough idle after a cold start-up. Sometimes, vacuum lines cause a rough idle due to a vacuum leak, and these lines are also simple to replace. The engine ran really rough for a few seconds and then died. Any more ideas?. Ask Question Asked 3 years, This might account for the bit of black/gray/bluish smoke on startup. A bad injector will cause rough idle all the time. I can take fuel out of idle range, but then it idles too low to start properly when cold. R1100RS rough idle. All 8 injectors were replaced under warranty June 2016. Please help. I'll give it another 3 weeks then it'll go back to gurgling. The truck will crank up and drive just fine but after 5-10 minutes of first cranking up sitting in an idle state it starts to idle real rough with RPM dropping down below 400 and bouncing back up to about 550 and idling rough until you hit the gas peddle will do this even worse after running it for 30 minutes it then will die but cranks right. I just went out to car and started it (approx 25 degrees outside where car is now) and car started fine but again a rough idle after the cold start. My car had this problem as well and it has been driving me nuts for 6 months. I then unplugged the IAC and the idle sped up and smoothed outplugged it back in and it went back to rough. If i let it sit for more than a few days, it has some weird issues. once it has been started once in a day the cast iron block and head, will hold enough heat/warmth to keep the injectors/fuel warm enough to not need preheating at all. HOW TO: Diagnose and fix that rough idle published by zoso on Thu, 01/07/2004 - 23:26 Ok, some thoughts and tips on the painful and elusive yet generally simple to fix problem of a rough as guts idle which makes your baby seem like the rusted out old crapbox that we all know it is not. The valve wont open and port air to the carbs to lean the mixture out. Re: Need help cold start rough idle! I have about 1400 Mikes on RZR 1000 S and just checked my Valves and they were all in spec but on the tight side (Lower Spec), mine is running fine, just thought I would throw that in. Here, we have a V-8 supercharged burnout elimination contender whose engine has a pronounced rough idle. Almost to the point where the misses are felt as small shocks through the drive train. com : Car complaints, car problems and defect information. I bought [a Mercury OptiMax 150-HP outboard motor] used and have had [problems with hard starting and rough idle] from day one. Any buildup on the throttle bore. I no longer have to do with discomfort at every light!. It will drive a little rough for about a mile to a mile and a half, then it will smooth out. It's been over 3,000 rpm in the past. Of course the problem is intermittant. 3l gdi engine When addressing a customer complaint of rough idle, which occurs only on the first start of the day and last s for 30-45 seconds, check for the possibility of poor injector performance in a particular cylinder. This is a discussion on rough idle at start up within the General Help forums, part of the LSx Technical Help Section category; I just rebuilt my ls1 and at start up the idle is around 250-500rpm. Hello, I have a 2007 Mini S 126000 miles When you first start it it idles great for about 10 or 15 seconds then it starts to rough idle. took it back when they had the parts and another mechanic said there was nothing wrong at all the problem is still there truck has 60,000 miles bought it used in october with 54000 at an idle it shakes alot and smokes on the road it. Because the fuel injectors have been moved from the intake tract leading into the engine (upstream of the intake valves) into the combustion chamber, the fuel mixture no longer cleans the intake valves of harmful carbon deposits. Immediately upon getting it back, began having starting problem. Idles a bit rough in cooler temps for a bit till it warms up. I might try running a couple of tanks of 95 and see if that improves the startup issue E85 was turned off in the tune as its not readily available here. If it does then the source of your crappy idle is the IACV. 2015 458 Erratic Rough Idle @ Cold Startup. Failing Electrical Components: A problem or failure in the ignition system or various electronic components can cause a rough idle. To Easily Distracted - when the car starts, it idles semi-smooth for 15-20 seconds, then it starts to idle rough and you have to catch it by stepping on the gas to rev it up. Now the situation I have on my BKC engine. I just replaced the plugs about 3 months back and it ran fine after, people have told me things like it is the o2 sensors to the cat is plugged up to my fuel filter is bad. This is a general guide which will list symptoms for 944 starting and running problems and common causes of those problems. Occasionally, at cold startup, the motor tends to idle rough. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. It's best done if there is a noticable problem, hard starting, rough idle, performance decline, misfire and/or injector balance test indicates injector deposits. I have a 2011 Concours 14 ABS with about 4500 miles. things leak. I can drive 2 miles to a stop sign and it idles normal at about 700 and is fine there after as long as its warm. After it warms up at idle, all is OK. Either it won't start for awhile or crank on it for awhile, runs rough, almost like not getting enough fuel and then is fine. Scanned obd and got po300, po301, po303, po305 as pending codes three days ago. 5 L 5 cylinder - Cars & Trucks question Search Fixya Press enter to search. Started up cold this morning, no more rough idle and it seemed to sit at a higher start up idle (1000rpm) a little longer then it did before with it gradually coming down as it warmed up, which i believe is the way it should work. You need to let the car get warm, and then let it idle for up to 2 mins to let the long term fuel trim reset itself. It runs great other than it idles rough when first started until it gets to normal operating temperature then it idles fine. When its warm outside and the engine is cold, the car starts and runs fine. I no longer have to do with discomfort at every light!. On one occasion it stalled. I changed the spark but I'm not resolve the problem. I've just changed my timing belt, waterpump, thermostat and coolant, on an 1. Did the plugs around 80K miles and had a new head cput in around 70K miles, I'm thinking a fuel filter maybe. 0 v6 and the 5 speed man* it idles pretty rough at start up (loping at about 500 rpms) but after a couople of minutes it stops and idles at about 1000 rpms with no issuses. The engine ran really rough for a few seconds and then died. I'll give it another 3 weeks then it'll go back to gurgling. 1) Rough idle for 1-2 minutes after startup (cold or warm), 2) The idiot light for the battery sometimes comes on, sometimes flickers (14. Hey guys, I just bought an 07 with the 5. We can now go into more depth on each of these categories and list the different possibilities. So the past couple months I've noticed my truck has a really rough idle in the mornings when it is cold out, to the point where it has even died before. However, it is easy to recognize the problem, as during rough idling either the engine would run at an irregular rate or it may have varying RPMs without your foot on the gas pedal. in the last 500 miles or so, she does not hit 2K any more at cold start - she will start up at around 1200 RPM or so - then settle down to 600 RPM idle speed after a short drive (1/2 mile or so). Last summer when I would start the unit in the morning, it had a rough idle. Engine rough idle problems arise because car engines are demanding. No DTC, no pending DTC, all readings normal. Just changed my fuel pump on my 95 chevy cause it was runinng very badly So now it runs fine Only problem is at startup the idle is very low but after a few seconds it idle perfectly. 0 v6 and the 5 speed man* it idles pretty rough at start up (loping at about 500 rpms) but after a couople of minutes it stops and idles at about 1000 rpms with no issuses. Recently had fuel injector #2 replaced. Have a mechanic check the functioning of your EGR valve, which can get plugged up by carbon from the. Rough idle/cold start code on my 2014 Chev Silverado for the second time now. They may also exhibit a hesitation or surge at a steady cruising speed. hey guys new to the site just bought a 96 ford ranger XLT 4x4 with the 4. It ran so rough yesterday that it tripped the CE light. My 2002 1500 Sliverado 4. So I've had the engine gurgling/rough idle thing for a few weeks now. Rough idle Chevy 4. Hi, My 2000 Ford Expedition with the 5. It used to idle around 700 roms and know seems to just drop to 500 or less when it sits for 15 seconds or more. Filters, have you changed your fuel and air filters lately. White smoke and/or coolant odor may come from the exhaust for an extended period of time at cold start as well. Rack Damper bolt needs adjusting. 3t with 40k miles. I can let it run for a few minutes and it will suddenly stop. As the engine heats, the IAC closes down and brings the idle down to the normal 650 +/- 50 and hold it in that range. First I will show you a video of such a rough idle and then list the possible problems that may cause that. First issue was at 84,000km. Got a 00 Ford Ranger that would stall when at idle if you turn the wheel hard or turn on the AC, etc. For the past week or so, Mini has a rough idle at cold start up (after sitting overnight). Jay Leno has the first look at the 2020 Chevrolet Corvette Stingray - Jay Leno's Garage - Duration: 7:46. A week later it ran rough again and the 'check engine' light came on later that day. Burp the throttle and it clears up. Rough Idle. How to Troubleshoot a Rough Idle in a Motorcycle. Hello! Bought a second hand 2010 X5 30d with 120K kms, car runs great and very happy with it, love it actually. Cold starts are rough idle are signs of low and uneven compression. If I take the RPMs up by hitting the gas, it smooths out, and runs great. 3 rough idle and dark cold start exhaust. On cold startup the engine stumbles for a few seconds before coming clean for a nice idle @ 850 with a slight lope. Cold engine, 50-90°F - almost stalls. Checked with a known good Fluke digital VOM),. 7L hesitation/rough idle on cold start IP: Logged Message: One more thing to consider would be the condition of your spark plugs/air filter. I recently puchased a 2007 9-5 2. This along with a timing advance raises idle speed. Always idled great after the engine warmed up, but power would occassionally dump when acellerating from a dead stop. Filters, have you changed your fuel and air filters lately. Rough idle at start up I have a 2004 buick rainier with 80 k miles. The engine is a 12. HELP? Would a dirty or sticky iac cause a rough idle for on ly a few seconds upon startup, or would it do it all the time. 0 v6 and the 5 speed man* it idles pretty rough at start up (loping at about 500 rpms) but after a couople of minutes it stops and idles at about 1000 rpms with no issuses. Rough idle at start up When I started the truck this morning it started right up but began to idle a little rough and dropped to about 500 rpm then back to a 1000. I have spent almost $1000. When starting cold, most of the time, it starts right up (starts cold idle at 2000 rpm, than slowly moves down as the engine temp goes up). Also blew some oily smoke on startup, but that ended in 30 seconds or so. Re: Rough idle at startup, fine once warm Started fighting a similar issue with our engines at the end of this season. first start up, the car has been sitting over night so everything in the engine is at ambient temperature. This is only on initial start whether the weather is hot or cold. Immediately upon first start up, the car was running smooth. Is my engine really that sensitive?. Page 1 of 3 1 2 3 Next > Sponsored By: May 21, 2016 at. What causes a rough idle? A rough idle can be caused by many different car faults. Hello, I have a 2007 Mini S 126000 miles When you first start it it idles great for about 10 or 15 seconds then it starts to rough idle. On startup, the engine sputters and idles low and emits white smoke from the exhaust. Rough Idle When Starting Cold, Then Goes Away When Engine Is At Operating Temperature More Details Below I have an older, low mileage vehicle with a V8 engine. Recently replaced coil, around 2 years ago. I don't have an engine light coming on though, so might not be the same issue! Your symptom is not as OP. Hello! Bought a second hand 2010 X5 30d with 120K kms, car runs great and very happy with it, love it actually. You need to let the car get warm, and then let it idle for up to 2 mins to let the long term fuel trim reset itself. Thanks a bunch. So I put a bottle of techron in the gas tank. Plenum is attatched to manifold and mounts up to the crossover housing. 00 trying to find the problem for this. I've seen numerous concerns here on the forums about people experiencing rough engine start/knocking noise at startup. I have an 03 R53 Cooper S JCW and every morning when i start up the car she idles a bit roughly as in the revs very.