My 91 5.0 runs fine at first startup and until it gets warm. Then, under, load, from light throttle to full, it'll stutter/hesitate/sputter/miss. It's not violent, just noticeabe, annoying, and power-sapping.
If I turn the car off and then restart it, it'll run okay again for a very short time before the miss rears its head again.
I have an intermittant check engine light. The only code I get is a code 94.
I've done the following to it already:
Replaced coolant temperature sensor (got rid of my code 21)
Cleaned MAF
Cleaned TB
Cleaned IAC
Checked and reset TPS
Tried driving with the EGR unplugged (no difference)
Changed both upstream oxygen sensors
So to me, the stutter seemes to be happening only in closed loop and/or when the engine is hot.
Any ideas? I'd really appreciate it.
If I turn the car off and then restart it, it'll run okay again for a very short time before the miss rears its head again.
I have an intermittant check engine light. The only code I get is a code 94.
I've done the following to it already:
Replaced coolant temperature sensor (got rid of my code 21)
Cleaned MAF
Cleaned TB
Cleaned IAC
Checked and reset TPS
Tried driving with the EGR unplugged (no difference)
Changed both upstream oxygen sensors
So to me, the stutter seemes to be happening only in closed loop and/or when the engine is hot.
Any ideas? I'd really appreciate it.