my car, about 3 days ago, i noticed that when i would let off (high vacuum), it would sorta jerk slightly, like i was slightly hitting the gas, tapping it...
vacuum reading are consistent tho and i sucked on the vac hose ffromthe regulator to see if the vac ws pulling fuel thru a rip in the diaphragm
no dice. nothing. clean as a whistle.
could it be the 10 degree weather messing with my setup a lil?
i mean the thing drives butter and its not unbearable, jsut someting i noticed...i am running an untuned p30 (rich), 43 psi fp, and loads of % on the afc , all to keep things safe till dyno day. this said, what if it is an over rich condition right before i let off and the plugs are fouling a bit under vacuum and no throttle...but then clear up once i give it throttle and drive?
could it be a slight misadjustment with the tps?
cuz i did notivce my afc was indicating 1.3, 1.7% etc at idle for throttle position instead of 0%...again, this could be the cold doingthis...



Modified by builthatch at 8:49 PM 1/17/2004

 

It very well could have something to do with the 10 degree weather, what kind of humidity is there, and what kind of atmospheric pressure. A fully built motor would be more sensitive to certain conditions. Best advice, get it tuned.

 

loose throttle rotor...so simple. damn BBK. new TB time!