I have a 3.1 it has been sitting for several years i replaced fuel pump. fuel filter spark plugs and wires. when you first start it up the car runs fine but wen it warms up the car has no power and jus misses i heard from someone it may be a Fpr any possible ideas. oh and by the way the service engine light go off every now and then but mostly stays on.

need to check the codes first before continuing any farther.

how do u decifer the codes

it is throwing a code 43

I'm having the exact same problem with mine. I haven't had time to go through the fuel system and clean everything out but I'll give you the same advice others told me.

One suggestion was rust in the gas tank. Since you replaced the fuel pump id assume you didn't notice alot of rust deposits in the tank. Or rust clogging the fuel filter or fuel injectors.

Another suggestion was a bad FPR.

And finally someone also said it might be a vacuum leak.

I'd put my money on the FPR since it seems to be the only remaining suspect.

so was it the fpr?