first off thanks for reading if anyone can help it would be appericiated, I got an 86 camaro 2.8liter recently bought wasnt running when i bought it i decided it was the fuel pump did thatand filter got it running starts hard pump dosent cycle when u turn the key on replaced fp relay no change car will start after turning over a few times when i here the fuelpump turn on car idels fine u can drive it down the road if u try to give it tomuch throtle it bogs down and will backfire threw the intake engine has about 20k on it i also instaled anew massair flow sensor and ecm only code i have is 54 can anyone help

 

Run a 12V source and ground to the top right (ground) and lower left (fuel pump test) ports on the ALDL. If the pump runs, the ECM is going south.

 

thanks for the responce i already did that befor i replaced the pump, next was the maf,third was the ecm its got a new one could the prom cause this i havent changed that just swaped it to the new ecm also did compression test 150 on all 6

 

Do you know what code 54 means? 54 means that there is a fault in the fuel pump relay circuit. This means that the MAF, engine compression, fuel injectors, and the PROM are all irrelevant to this problem unless you have another code. If the test I posted above runs the fuel pump, the ECM needs to be replaced, period. I've been there and dealt with this. Replaced 2 ECMs and 2 fuel pump relays to get rid of the problem.

The extended crank is because it's taking time, with the cold weather outside, for the oil pump to build enough pressure in the oil galleries inside the engine to activate the backup oil pressure fuel pump switch because the fuel pump relay circuit isn't working to prime the fuel system so the engine is primed and ready to run.