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t0rtur3d · 05-05-2012, 06:36 PM

For the past few weeks my 1989 GTA has shown a slight studder while maintaining speed. No hesitation or chugging while accelerating, but will not exceed 3,000-3,200 rpm. (sounds and feels like a fuel cutout) I have changed a few parts and the hesitation has almost vanished. The exhaust system is leaving at the Manifold Y-pipe connection, and my first thought was that this could be causing the O2 sensor to malfunction.

Parts changed :
Belt
alternator
fuel injector (cyl 7)
plugs
cap/ rotor
ICM
Plenum gaskets.
Fuel filter
Air filter

Any ideas as to what could be causing this?

05-05-2012, 06:36 PM	#1
t0rtur3d Join Date: Mar 2012 Location: lyndhurst Posts: 142 iTrader: (0)	slight studder while maintaining speed, and won't exceed 3,000 rpm while in gear For the past few weeks my 1989 GTA has shown a slight studder while maintaining speed. No hesitation or chugging while accelerating, but will not exceed 3,000-3,200 rpm. (sounds and feels like a fuel cutout) I have changed a few parts and the hesitation has almost vanished. The exhaust system is leaving at the Manifold Y-pipe connection, and my first thought was that this could be causing the O2 sensor to malfunction. Parts changed : Belt alternator fuel injector (cyl 7) plugs cap/ rotor ICM Plenum gaskets. Fuel filter Air filter Any ideas as to what could be causing this? Last edited by t0rtur3d; 05-05-2012 at 06:47 PM.