Ive had this problem with the tbi since i got the car. When you get it to a certain RPM it starts to buck..It gets worse when the car is warm or you drive it and turn it off, and then crank it back up. It idles fine and drives fine before that RPM.
So far ive done:
plugs, wires, cap, rotor
all sensors in the car
checked all fuses
Fuel delivery looks good(nice misty cone)
Oil Changed, filter
Coolant Flushed
i think the emissions stuff is unhooked


ive had past codes 25 34 and 54..but ever since i tuned it up they havent came back
only thing i havent done is fuel filter...but i dont see how itd be the problem..any suggestions plzzzzzzzz

 

Have you pulled the codes from the ECM yet?

 

thats the crazy thing about it..it doesnt show a code..i had a code for my map sensor earlier and one for my IAT but both of those were cleared.

 

Ignition module tested?

 

Woo--i was thinkin that no one was going to reply

but no ive never tested the ignition module...guess thatll be the next thing to get. Just curious, how does a bad ignition module, cause this problem?

 

The module gets warm and it stops sending the signal to the coil to fire. If you end up replacing the module, I would recommend the coil as well. The two seem to fail about the same time.

 

okay apprecitate it..always happy to learn something new..im really hopin this works im trying to sell the car but i need it to be in top running condition cuz i dont wanna cheat anyone.

 

okay well it seems that the Ignition Module and the Coil were not the culprits. The car runs a little better but it still persists to struggle at a certain throttle point. Its especially noticable when accelerating off of a hill like place..any more suggestions..??

 

Anyone!?!??