LoverofCar 6th Gear July 17, 2011 Share July 17, 2011 If is misfire...Misfire can also due to plug cable..but don't change everything at one go..change the cheapest part first so you can isolate the part with problem.. ↡ Advertisement Link to post Share on other sites More sharing options...
Ithunk 1st Gear July 17, 2011 Share July 17, 2011 from my experience bmw coupes should drive smoothly....was offered a drive by a dealer anyway how is the driving style when u got the vehicle.... if it happens when u got it u can go the agent or a bmw workshop to check it out Link to post Share on other sites More sharing options...
Jim 1st Gear July 17, 2011 Share July 17, 2011 Could be a dirty throttle body. At least that's what my mech tell me for my car when it shudders on move off and stopping, but I am too cheapskate to pay to clean it, and it went away after my last oil change which also included changing spark plugs and transmission fluid. My car is not BMW though. Link to post Share on other sites More sharing options...
Whatisthis04 Neutral Newbie July 17, 2011 Share July 17, 2011 To TS, go get the ATF chng and see if u still encounter the jerk... I don't tink it's the plugs..... Link to post Share on other sites More sharing options...
Thaiyotakamli Supersonic July 17, 2011 Share July 17, 2011 (edited) maybe can ask the AD to reset the ICU or maybe due to spark problem, as said by bros here, WORST COME TO WORST GEARBOX PROBLEM! Edited July 17, 2011 by Thaiyotakamli Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 18, 2011 Author Share July 18, 2011 Thanks for the interests and replies. Really appreciate the insights gathered. Let me first provide an update and sum up the situation with your kind inputs. :) Other than the automatic "drive" mode, my ride comes with an automatic "drive-Sports" mode, as well as the steptronic manual mode. I tried the "Sports" mode. I noticed that the rev is higher, and the RPM was never dropped below 2000. The gear change was smooth and there was no jerking. This mode of driving will drive the fuel consumption up though. Back to the problem, as it happens only in the normal "drive" mode, the shuddering happens when the RPM is around 1300-1500. I guess it is a case of low RPM on a higher-than-required gear. Now that it works well on the Sports mode, but not that well on the Drive mode. I would think that there is no problem with the plugs, plug cables, engine and gear box? I would like to hear that the problem is caused by dirty throttle body or maybe the reset of the ECU. Correct me if my deduction is wrong, mates. Link to post Share on other sites More sharing options...
Notsogoodman 4th Gear July 18, 2011 Share July 18, 2011 bro, try the BMW-SG forum... http://www.bmw-sg.com/forums/ Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 18, 2011 Author Share July 18, 2011 Thanks! Will check it out. Link to post Share on other sites More sharing options...
JonEthan Neutral Newbie July 18, 2011 Share July 18, 2011 had this problem before. it was due to a leak (cut) on the spark plug cable. Just changed the cable and everything was ok. Link to post Share on other sites More sharing options...
Contax 1st Gear July 18, 2011 Share July 18, 2011 clean your throttle body and sensor due carbon built up over time without spirited driving. Link to post Share on other sites More sharing options...
5936 1st Gear July 18, 2011 Share July 18, 2011 This is also possible. Link to post Share on other sites More sharing options...
Jolie888 Clutched July 18, 2011 Share July 18, 2011 If your 320i is the E46 (and earlier) model, using the M52B22 (2.2L IL-6) engine, that block is known to have some interface 'mis-givings' with the Steptronic gearbox. Many owners had sensed some form of hesitation, vibrations even, upon normal acceleration from stationary in Auto mode. But if your 320i is the E90 current model, post M54 engines ... the current ones being the N-series with Valvetronic, then I'd suggest that you go back to PML to have the AD's workshop test and provide a cylinder-by-cylinder combustion-cycle profile report. This would usually show where mis-firing could have happened, on which cylinder, due likely to a mis-timed follower-cam profile, that may only require the Valvetronic EU to be re-flashed, or in the worst case, the whole Valvetronic stepper motor to be replaced. Link to post Share on other sites More sharing options...
Subutai 3rd Gear July 18, 2011 Share July 18, 2011 Petrol filter? Happened to my previous ride. Changed petrol filter after using 30k and problem was solved. Link to post Share on other sites More sharing options...
Throttle2 Supersonic July 18, 2011 Share July 18, 2011 (edited) Hhhmm,....let me see, I think you can solve your problem by getting a 325i....heh heh....dont hit me, joking only Edited July 18, 2011 by Throttle2 Link to post Share on other sites More sharing options...
Gendut 2nd Gear July 18, 2011 Share July 18, 2011 Hi, I've been on the road for 10 years... Hmmm Without a history of what has been done to the car, its diff to diagnose. Only way out is by trial and error. But I would go and check the injectors first because it sounds like its not getting enough fuel at low cycles. OBDII would also help. Good luck. Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 18, 2011 Author Share July 18, 2011 If your 320i is the E46 (and earlier) model, using the M52B22 (2.2L IL-6) engine, that block is known to have some interface 'mis-givings' with the Steptronic gearbox. Many owners had sensed some form of hesitation, vibrations even, upon normal acceleration from stationary in Auto mode. But if your 320i is the E90 current model, post M54 engines ... the current ones being the N-series with Valvetronic, then I'd suggest that you go back to PML to have the AD's workshop test and provide a cylinder-by-cylinder combustion-cycle profile report. This would usually show where mis-firing could have happened, on which cylinder, due likely to a mis-timed follower-cam profile, that may only require the Valvetronic EU to be re-flashed, or in the worst case, the whole Valvetronic stepper motor to be replaced. Mine is the e90 model and yes, I think that cylinder check would be a good starting point. Thanks for the info. Really praying that it's not the worse case scenario that you have painted. :) Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 18, 2011 Author Share July 18, 2011 Hmmm Without a history of what has been done to the car, its diff to diagnose. Only way out is by trial and error. But I would go and check the injectors first because it sounds like its not getting enough fuel at low cycles. OBDII would also help. Good luck. Thanks, Gendut. Really hope to get rid of this problem. Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 18, 2011 Author Share July 18, 2011 Hhhmm,....let me see, I think you can solve your problem by getting a 325i....heh heh....dont hit me, joking only Hee hee... Throttle, that's an ingenious way out! Maybe 5 years later! ↡ Advertisement Link to post Share on other sites More sharing options...
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