camaro485

I got a flat and had to put spare on was running 19' rims. So put spare on front right, I bottomed out while making a turn into a restaurant, came out, backed up car died, after about 20min I got it to start, drove home about 2 mi, was backfiring out of intake it was running super lean about 20-25 psi, I looked under car didn't see any scrapped wires are scuffs on anything, so i figured the jolt took out FP, so i put on a walbro 255 and hotwire kit, its real spotty, fuel pressure good exept under load, i've done everything I can think of, leak down on injectors all good put on new fpr, new filter, checked fuel rails injectors fpr 4 times all good checked voltage at fp about 14v. out of ideas!!!

It is a 96 Camaro z28, just put a new motor in about 1 yr ago, cam, heads, headers, underdive pulley, custom tune

StraightTimeStirrups

If everything is checking out the only things it could be are Bad Fuel Flow! Either the pump cant pump enough fuel to keep up with demand or you have a restriction in the Tank Screen or Fuel Lines! Look for some damaged fuel lines that run from the tank to the engine compartment!

StraightTimeStirrups

My guess is you smashed a fuel line when you bottomed out!

popo8

Whats the fuel pressure after you swapped out everything... idle and wot...?

camaro485

around 42 idle jumps to about 46-48 WOT when i replaced the fpr i went with adjustable, it doenst hold after prime but i swapped it back and forth with stock, every once in awhile at idle it will drop to about 25psi but just for a sec i cant get a volt meter on it quick enough, even under load it will be ok then it drops and boom out the intake, i dont want to run it to much more scared engine will crap out, all the fuel lines run up the drivers side and it definately hit on pass side but i will double check fuel lines again tomorrow.

Sorry for run ons grammer no bueno