What to do next ?

grey88gt · 06-26-2005, 10:45 PM

Bone stock 88GT AOD trans. What Ive done so far. New plugs, cap, rotor, wires, ignition coil, TFI module, 190 LPH fuel pump, ( yes its overkill for stocker) got a good deal on it, series 40 Flowmaster cat backs with turn downs at mufflers. Timeing is at 14, checked TPS voltage its ok. It has no vacuum leaks. Engine starts and idles fine hot or cold, runs great excellant power. My problem is at idle or under slight load ( say 1/4 throttle in any gear engine has a slight missfire. It does not backfire under any conditions. Step on the gas and it goes away. I have also put a fuel presure gauge on and with the vacuum line off its at 42 psi at idle 38 psi with it on. If I take the vac from the regulator at idle the engine stubles a bit but recovers with a slightly ruffer idle. Iam thinking that the injectors may be giving me the problem. I do have a new adjustable FPR not on yet. Whats left ?

Sry such a long post. Thanks In Advance

06-26-2005, 10:45 PM	#1
grey88gt Registered Member Join Date: Feb 2004 Location: Skiatook, Oklahoma Posts: 193	What to do next ? Bone stock 88GT AOD trans. What Ive done so far. New plugs, cap, rotor, wires, ignition coil, TFI module, 190 LPH fuel pump, ( yes its overkill for stocker) got a good deal on it, series 40 Flowmaster cat backs with turn downs at mufflers. Timeing is at 14, checked TPS voltage its ok. It has no vacuum leaks. Engine starts and idles fine hot or cold, runs great excellant power. My problem is at idle or under slight load ( say 1/4 throttle in any gear engine has a slight missfire. It does not backfire under any conditions. Step on the gas and it goes away. I have also put a fuel presure gauge on and with the vacuum line off its at 42 psi at idle 38 psi with it on. If I take the vac from the regulator at idle the engine stubles a bit but recovers with a slightly ruffer idle. Iam thinking that the injectors may be giving me the problem. I do have a new adjustable FPR not on yet. Whats left ? Sry such a long post. Thanks In Advance