Still Bucking Around 1500 RPM.

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11-11-2005, 05:55 PM

#41

GuitsBoy

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My Duffco is always working to save me gas... unless im tweaking the VE, it stays enabled.

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11-11-2005, 06:38 PM

#42

Bill Bowling

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Quote:

Originally Posted by JS

When u guys say bucking,My car under cold start in revrse feels like a slight miis,bucking,chugging but as soon as I pull away it goes away until I come to a stop again under say 1500 rpm...If I pull to a light slowly Ifeel it once warmed up..If I come to a stop and hold my foot on the brake its non exsistant but if I take my foot off the brake and slowly pull away from the light I feel the bucking until about 1400 and thenit s gone again...

Is this what your describing cause its driving me crazy....
No codes of anykind,just this weird amonolie...

My bucking is when I am driving around 40-50 and the TPS is 0% -1400 to 1600 RPM (coasting).

Bill

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11-12-2005, 12:25 AM

#43

WS6FirebirdTA00

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bill, what are your throttle cracker readings at that range? may be too much

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11-12-2005, 07:07 AM

#44

Another_User

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Quote:

Originally Posted by WS6FirebirdTA00

bill, what are your throttle cracker readings at that range? may be too much

If your running airflow is right you shouldn't need to touch throttle cracker too much, but that reminds me, it helps to flatten the throttle cracker table where the bucking is. Because of the overlap in an aggressive cam you can never 100% get rid of the bucking, but fixing all the things listed above and smoothing out your spark and your throttle cracker will help keep the oscillation from being as noticable. You have to figure...do you want your car bucking with the IAC varying quite a few steps and spark varying quite a few degrees? Nope. It just makes things worse.