Slight hesitating/jerk while cruising but perfect under acceleration???

[skrrtythiirty]

Hey r3vlimited, to start off, I have an 87' 325i with an 88' super-eta swapped in, engine has been rebuilt with a 274/280 reground cam, Vibrant bellmouth intake, bavauto longtube headers w/ a cat delete, to a g-power exhaust. Also with a whodwho megasquirt, 19lbs injectors, LC2 and a AFM delete. Recently I've noticed that when im cruising, with no pressure on the gas pedal, the car seems to hesitate and jerk a bit, but when i step on the throttle there are no problems. A while back there was a vacuum leak and I had all of the hoses and injectors replaced, but I just started noticing this. I was wondering if anybody had any ideas as to what this may be? Thanks

[Todd Black 88]

Does it feel like you are driving into an intermittent gust of wind?


I had that in my M3 that turned out to be the inner tank fuel pump was dead. If you still have the dual pump setup, it could be your issue.

[Bearmw]

That sounds a bit like the acceleration enrichment is too close to steady state throttle but with no changes made I don't know