Intermittent jerking?
Thread Starter
Racer
Joined: Apr 2005
Posts: 288
Likes: 0
From: Huntington Beach, Ca.
Back from the dealer. The technicians said they couldn't reproduce the problem and that the car is running "as designed". Interesting, I could still feel the hesitation on the way home. By the way, it's not at any particular rpm, it's anytime I'm cuising at a steady speed. I think I'm going to clean the MAF tomorrow while the shop is putting the short shift kit in. We'll see. I don't even know what the MAF looks like or where it's located. I'll have to see if there's a DIY post around that somewhere. If anybody has a pic of what Bob M described in the above post I'd love to see it.
Racer
Joined: Jan 2005
Posts: 433
Likes: 0
From: San Francisco, CA
Sadly, I just had this same thing happen last night on the way home from work. At about 2-3K RPM, the car would start jerking back and forth. It would still accelerate, but it would do so in a very jerky fashion. I pulled off the freeway and tried to "reset" the system by turning the car off and on. Alas, it didn't fix the problem. However, after about 1 more mile of driving this way, the problem just disappeared. Didn't reappear on either the rest of the way home or the drive in to work this morning. Any other ideas? BTW, I have an '06 C2 with a little over 7K miles.
Flying Low, did you ever discover what the problem was?
Flying Low, did you ever discover what the problem was?
Three Wheelin'
Joined: Dec 2001
Posts: 1,983
Likes: 24
From: USA
it's probably an ecu adaptation to lower octane crappy fuel. I noticed this in the past when running straight pump gas. The quality of the pump gas was all over the place. I now use 50/50 mixture or straight 100 unleaded octane and no hesitations. try the 50/50 mixture and see, I;m sure that's what causing this.
Thread Starter
Racer
Joined: Apr 2005
Posts: 288
Likes: 0
From: Huntington Beach, Ca.
Interesting you should mention race gas. Up until today the problem persists. I just put 5 gallons of race gas in a full tank so I'm running about 94.5 octane according to the Rocket mixture table. We'll see if that helps at all. I have already noticed better acceleration with this mixture.
Rennlist Member
Joined: May 2001
Posts: 458
Likes: 0
From: San Diego, California
Flyinglow; you must be in Sea Cliff? It looks so from the picture. If so I am right around the corner from you in HB......I've got an '01 996TT.
For my 2 cents; it sounds like MAF, or plugs possibly. With these faults unless the car throws a code the dealer won't see it unless it happens under thier britches while they are driving it.
The varioram does produce a mild jerk (jerk may be too strong a term) in the transition through 3K RPM. But not as violently as you are (apparently)describing. However it SHOULD be perfectly content to roll along at constant throttle without a lot of bucking and shucking.....
Did the dealer hook it up to the code reader?
For my 2 cents; it sounds like MAF, or plugs possibly. With these faults unless the car throws a code the dealer won't see it unless it happens under thier britches while they are driving it.
The varioram does produce a mild jerk (jerk may be too strong a term) in the transition through 3K RPM. But not as violently as you are (apparently)describing. However it SHOULD be perfectly content to roll along at constant throttle without a lot of bucking and shucking.....
Did the dealer hook it up to the code reader?
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