mustang5.090

Hey guys my buddy picked up a 92 GT 5.0 vortech sc 42lb injectors Car will not run, its a stock block stock intake etc etc just with the vortech and injectors Its flooding TERRIBLY it will not start its pouring gasoline out of the cylinders pretty bad I have all the plugs out, has and adj regulator seems to be working properly hovering around 35 psi, it seriously seems when cranking that the injectors are all stuck wide open its dumping some serious fuel into the cylinders I'm kind of at a loss here? cause I have no idea what could be causing this, other than the stock computer not being able to handle the injector size any insight is appreciated

mjr46

pull the inj rail and lay on a towel and see if a inj is stuck wide open....had one do such a while back so bad it was dumping it out the tail pipe, yup just one did that....once you find which one then you need to change the oil once it's repaired

mustang5.090

its flooding like that on all 8 cylinders though, you think all 8 injectors could have bad at once? do i even need 42 lb injectors on a stock motor with a sc? or could i go smaller?

mjr46

depends on boost level but 42's are common on a stock boosted motor based on boost level..........you need to pull the rail up like I said and turn the key to on and see if they begin to start to spray to verify if all 8 are being held open in koeo mode, if so you'll see the problem.........so does it flood with key on engine off...meaning inj's pump fuel in to the motor? fuel pump should power up briefly for 2 sec in koeo and shut off after no pip is seen......if pump stays running in koeo after 2 sec you have another issue.

mustang5.090

it only floods while cranking, koeo pump primes like normal and shuts off, it only dumps fuel when your crank it over

mustang5.090

I just pulled the intake and the fuel rail and all of the injectors are firing off at the same time, is this normal? i dont think it is lol

mjr46

sefi = sequential, based on firing order, if they all spray at once, could be a ecm or dizzy/tfi issue

mustang5.090

yeah i swapped the computer with another i had lying around and same result, im gunna try swapping the dizzy when i get teh chance just got dumped on with snow here lol

mustang5.090

Changed distributor still no start, anyone? need help here bad? set tps voltage, changed all the sensors coolant, need to get to see if o2s are good idk, swapped computer with known good computer, swapped distributor with known good distributor