ive now replaced cap and rotor, plugs, coil, ignition control module, fuel filter, fuel pump relay, ran tectron through the tank, still no help, drove the car around yesterday after replacing the ignition module, ran great, tried again today and again afyer 5 min would buck and hesitate when acelerating, if i take it out of gear and just rev the engine it wil re past 4000 rpm no problem, as sonn as i drive it will not acelerate, im getting desperate now, anyone that can help?

replace :DIn-tank fuel pump

but why would it work on start up and allow the car to rev in nuetral if it wasnt working?, i can get one at the pic u pull tomorrow, but just wondering how that would stop it from accelerating, thanks

Check for vacuum leaks and compression. Otherwise. fuel mixture could do that.

Just wondering but with all that work why don't you change your vacuum hoses while you're at it. I know it's a bit basic but it's good to start with the basics, I know they can look fine while being hard and having cracks.


edit-damn beat me to it^

It's likely a lean issue. All the fixes listed above are potential causes for lean mixture. vacuum leaks, low system fuel pressure caused by a weak pump or clogged filter, incorrect control pressure (too high), or incorrectly adjusted fuel mixture.

Check for vacuum leaks. Try adjusting your mixture slightly richer (1/8 turn at a time max).

The in-tank pump is the least likely, early k-jet cars didn't have an intank pump at all.

dont forget to check timing, do that before adjusting the mixture

ive now replaced cap and rotor, plugs, coil, ignition control module, fuel filter, fuel pump relay, ran tectron through the tank, still no help, drove the car around yesterday after replacing the ignition module, ran great, tried again today and again afyer 5 min would buck and hesitate when acelerating, if i take it out of gear and just rev the engine it wil re past 4000 rpm no problem, as sonn as i drive it will not acelerate, im getting desperate now, anyone that can help?

I'm having the exact same problem. what did this turn out to be for you?

The in-tank pump is the least likely, early k-jet cars didn't have an intank pump at all.

Mybe so, but a non-working pump is alot more restictive than just a pipe. You also need to make sure the screen on the bottom is clean.