ive got a 1988 firebird with a 2.8 that i got form my uncle he let it sat for 6 or 7 years and i got it running. it ran fine for 6 months than is stared running crappy at wot.
now its staring to miss fire and i will hardly stay running
plz help

 

Sounds like a clogged cat converter to me, if not that, then try a tuneup, new spark plugs, wires if needed, check for vacuum leaks, replace fuel and air filter, oil change, and seafoam the engine.
Check cat converter first, and if you haven't kept up on maintenance try the tuneup, or you can do both...really should keep up on maintenance running poorly or not.

 

ive thought it was the fuel injectors so i have been running gumout to clean out the whole fuel system
i have replaced the fuel filter
ive do an oil change
and i dont have a cat anymore

 

Any check engine lights? check your O2 sensor also check the plugs

 

i know i have a code 22 (tps) and a code 54
ive looked five of them and they looked good theres 1 i cant get to
ill check the o2 sensor tomorrow when i have light

 

Code 54 is either a bad fuel pump relay or ECM. Code 22 means that the TPS needs to be replaced and could be the cause of your problems. If you go to the right yard, you can get a pack of TPS, IAC, and CTS or more sensors for cheap. I got one for $10.

 

EEHH...code 54? Just replace the ECM. Thats what I had to do with mine. And for sure, replace the TPS. My car sat for a good number of years as well and I am now excising the same demons.

 

if its a bad fuel pump relay,how would i know??

 

Swap it for one of the ones next to it. That's the easiest way. They're all the same, pretty much. But, if you already have a code 54, more than likely, the ECM is the culprit, and if it has a code 54 now, it could eventually die altogether and leave you stranded.

 

now ive dont have any codes any more and i havent changed anything not miss firing any more its just not getting up and going any more. my master cylinder for my clutch went bad could this be one of my problem?

 

i changed a fuse for the head lights and it started running right