richabilly

i have a 94 5.0. The engine stutters and bucks unless i REALLY get into the throttle. After it drives for a while, it seems to be less pronounced but still exists. Even with the engine warm, if i restart the car it will do it all over again, even if its already at operating temp. I have replaced:

Fuel Pump
Fuel Filter
ECU
Cap, Rotor
Coil
TPS
MAF
Plugs, Wires

Timing is perfect

i am at a loss -- the computer is a 90. The car had a 5 speed but i swapped in an AOD. Thats the only weird thing. The engine is stock.

any ideas?

mattdel

Sounds emissions system related, EGR, EVP.

Run codes. http://sbftech.com/index.php?PHPSESS...d&topic=2471.0

javila2468

mine would do that and it was the engine coolant temperature sensor (NOT THE SENDER).

richabilly

okay i'll try the engine coolant temperature sensor -- cheap fix. Then move on to the emissions stuff if that doesnt work. The problem is also i have a lot of smog codes thrown on the ECU because the smog stuff was removed. Dont need to smog a 61

wydopnthrtl

Before I read your list I was thinking TPS or MAF. Next I was thinking a vacuum leak.

Sure would be nice to have a wideband hooked up to see what the a/f is doing.

I'm not too familiar with these older 5.0L so I'd listen to guys like mattdel first.