I recently bought a 1988 gmc with the 350 tbi and 700r4 in it. It was my dads truck before, and he never had any issues with the engine much. He did have transmission problems, and I recently finished swapping the tranny and I noticed a very serious sputtering issue on acceleration. It starts alright although you have to crank it for 2 or 3 seconds when cold. Idles great, if maybe a little fast. It depends on the speed you are going when you try to accelerate, but above about 50 percent pedal the engine will sort of cut out for a couple seconds, then just sort of sit there and sputter, going something like a bu-bum very slowly, around 1 every one or two seconds, going steadily though. Then if you keep going wide open it will just sound like a really loud fan and the engine will load up, but not sound like normal at high rpms.
Am very confused on what this would be, and none of the suggestions I've found so far have worked.
Could something in the tranny swap have caused this?
So far I have tried:
Egr delete
Map sensor and tps sensor
Unplugging o2 sensor
Fuel pressure regulator, and am getting a nice cone of fuel while idling at least
In the process of a fuel filter and pump, although the tank looks great and there is a newer assembly in
Have also tried the paperclip method on my check engine light, but it doesn't show a code.
Have also noticed my gauges are not working the best.
Will try to include a video once the truck is back together, but any suggestions off what I've said would be appreciated.
Am very confused on what this would be, and none of the suggestions I've found so far have worked.
Could something in the tranny swap have caused this?
So far I have tried:
Egr delete
Map sensor and tps sensor
Unplugging o2 sensor
Fuel pressure regulator, and am getting a nice cone of fuel while idling at least
In the process of a fuel filter and pump, although the tank looks great and there is a newer assembly in
Have also tried the paperclip method on my check engine light, but it doesn't show a code.
Have also noticed my gauges are not working the best.
Will try to include a video once the truck is back together, but any suggestions off what I've said would be appreciated.