problem with my GSR

[delphinium]

Originally posted by AlucarD@Dec 9 2004, 11:24
Agree with Joeker, either fuel or ignition. Last time I had the same problem, it will jerk a full boost at high rpm. You are either too rich/lean or too advance/retard.

BTW, is this a boost cut? Does you boost still climb when it is jerking. What I did was to change injectors add a better fuel pump and a FPR. Problem solved. Plugs too, changed to No.7. Happily boosting without jerking at any rpm and no matter how I step on d paddle. Of course, get it tuned properly ler, by fixing your AF, you'll be amazed on the power gains.

i guess you were right about the AF thingy. I plugged back my AFC to the ECU without tapping the AF signal (pressure signal in my case). It turn out that my AFC no longer giving the correct voltage to cheat the ECU so that it will supply more fuel when needed. The ol-skool AFC now serve no purpose of controlling the fuel already. it becomes my shift-light now :)

since the problem occurs when hitting the gas pedal hard, could it be the TPS?
thanx in advance.