Pjlee25 Neutral Newbie July 17, 2011 Share July 17, 2011 Hi, I am a light-footer on the accelerator. At times, my car will shudder or jerk during gear change. The shudder happens only when I try to accelerate (lightly) after dropping speed (i.e downing from higher gears). The shudder is just like how a manual transmission car is about to stall when there's insufficient rev. The shudder will go away when 1) I release my footing from the accelerator, or 2) I rev harder on the accelerator. The problem does not happen all the time on all gears, but only about a couple of times per drive, and only at gear change between gear 2/3/4 (i have a 6 speed auto gear box). Also, if I provide a heavier footing on the accelerator, I will not get this problem at all. Well, I don't wish to be heavy on the gas all the time, as it will drive up fuel consumption. It's also not my driving habit. What could be the problem? Is there a problem with the gears, auto transmission system, oil, or valves? I'm loss at this as I can't seem to find much info about this from the internet. Thanks! ↡ Advertisement Link to post Share on other sites More sharing options...
Swingarm 1st Gear July 17, 2011 Share July 17, 2011 Most probably is plug misfire.... When is d last time u change ur plug? Link to post Share on other sites More sharing options...
Friendstar Supercharged July 17, 2011 Share July 17, 2011 Hi, I am a light-footer on the accelerator. At times, my car will shudder or jerk during gear change. The shudder happens only when I try to accelerate (lightly) after dropping speed (i.e downing from higher gears). The shudder is just like how a manual transmission car is about to stall when there's insufficient rev. The shudder will go away when 1) I release my footing from the accelerator, or 2) I rev harder on the accelerator. The problem does not happen all the time on all gears, but only about a couple of times per drive, and only at gear change between gear 2/3/4 (i have a 6 speed auto gear box). Also, if I provide a heavier footing on the accelerator, I will not get this problem at all. Well, I don't wish to be heavy on the gas all the time, as it will drive up fuel consumption. It's also not my driving habit. What could be the problem? Is there a problem with the gears, auto transmission system, oil, or valves? I'm loss at this as I can't seem to find much info about this from the internet. Thanks! what is ur ride? easier for us to advice. Cruze? Link to post Share on other sites More sharing options...
Sabretan 4th Gear July 17, 2011 Share July 17, 2011 Yup we need to know if ur ride is a full automatic or semi automatic. For Semi Automatic, some form of jerking (not really jerking, but u can tell the gear is changing) from 1st to 2nd gear maybe obvious. Link to post Share on other sites More sharing options...
Zze121 3rd Gear July 17, 2011 Share July 17, 2011 Wrong spark plug use can cause jerk due to misfire. Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 17, 2011 Author Share July 17, 2011 Hi, Ride is 320i. Problem happen only during full-automatic mode. If it is wrong plugs, I would think that the problem will be a consistent one, right? i.e. happens all the time. But mine doesn't... it happens but it goes off after it gets over a couple of times within a ride. Link to post Share on other sites More sharing options...
Gendut 2nd Gear July 17, 2011 Share July 17, 2011 Hi, I am a light-footer on the accelerator. At times, my car will shudder or jerk during gear change. The shudder happens only when I try to accelerate (lightly) after dropping speed (i.e downing from higher gears). The shudder is just like how a manual transmission car is about to stall when there's insufficient rev. The shudder will go away when 1) I release my footing from the accelerator, or 2) I rev harder on the accelerator. The problem does not happen all the time on all gears, but only about a couple of times per drive, and only at gear change between gear 2/3/4 (i have a 6 speed auto gear box). Also, if I provide a heavier footing on the accelerator, I will not get this problem at all. Well, I don't wish to be heavy on the gas all the time, as it will drive up fuel consumption. It's also not my driving habit. What could be the problem? Is there a problem with the gears, auto transmission system, oil, or valves? I'm loss at this as I can't seem to find much info about this from the internet. Thanks! How long have you had your license? Or more specifically how long is your driving experience? I don't think there will be any problems if you leave yr auto shifting alone. Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 17, 2011 Author Share July 17, 2011 Hi, I've been on the road for 10 years... Link to post Share on other sites More sharing options...
Jasonjst 3rd Gear July 17, 2011 Share July 17, 2011 Hi, Ride is 320i. Problem happen only during full-automatic mode. If it is wrong plugs, I would think that the problem will be a consistent one, right? i.e. happens all the time. But mine doesn't... it happens but it goes off after it gets over a couple of times within a ride. Normally happen at gear 2 , low speed ? I guess is lack of power lah , if you gas more slightly should be OK right ? Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 17, 2011 Author Share July 17, 2011 Normally happen at gear 2 , low speed ? I guess is lack of power lah , if you gas more slightly should be OK right ? Yes. I don't face the shudder if I gas it more.. but was just wondering if there is really a problem as I don't recall having the need to gas more for my previous rides. Link to post Share on other sites More sharing options...
Good-Carbuyer 1st Gear July 17, 2011 Share July 17, 2011 Hi, I've been on the road for 10 years... Driving this car all the while with same issue, but only share with us now? Link to post Share on other sites More sharing options...
Brock 1st Gear July 17, 2011 Share July 17, 2011 I encountered this problem when the car is engaged at D and is idle. Problem was spark plug cable. Incorrect fitting as it was aftermarket. Changed it and problem went away. Not sure if you are facing a similar one. Could be spark plug related like the brudders have mentioned. Link to post Share on other sites More sharing options...
Xdeatel Neutral Newbie July 17, 2011 Share July 17, 2011 I do face the same problem during light acceleration. During low speed (0-10km/h), sometimes when i do light acceleration(depress the accelerator just a little, like 0.5cm) my car may start to jerk. However it all goes away after i accelerate above 10km/h or I accelerate heavier. Car model I'm driving is Nissan 350z(2007) Link to post Share on other sites More sharing options...
Xdeatel Neutral Newbie July 17, 2011 Share July 17, 2011 I forget to add that its an auto car. Been driving this car for a year plus, and only 7-8months ago it starts to have such a problem. Link to post Share on other sites More sharing options...
Cybernation Neutral Newbie July 17, 2011 Share July 17, 2011 Try changing the spark plugs, sounds like irregular firing order of your plugs.. Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 17, 2011 Author Share July 17, 2011 Driving this car all the while with same issue, but only share with us now? Nope. Just changed my car not too long ago. Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 17, 2011 Author Share July 17, 2011 I forget to add that its an auto car. Been driving this car for a year plus, and only 7-8months ago it starts to have such a problem. Hi Xdeatel, are you still on this problem still? for 7-8 mths? Or you have solved it by changing the plugs? Link to post Share on other sites More sharing options...
Pjlee25 Neutral Newbie July 17, 2011 Author Share July 17, 2011 Try changing the spark plugs, sounds like irregular firing order of your plugs.. Perhaps... u guys know when about should plugs be changed? I'm on the current set of plugs (high power type) for about 30K km now. ↡ Advertisement Link to post Share on other sites More sharing options...
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