START IDLE, RUNS THEN DIES
i have a problem that is *(&(%) me up the car is a a 1986 mustang 50 fi [speed density]
here's what happens, hard start-if left to idle for about a min it dies boom! shuts right down and if you try to give it ANY throttle it's like you hit a kill switch ,....but sometimes if you just floor the car it will run at about 3000 rpm but lumpy sounding as if a cam were in it [but it's stock] if you release the throttle it smooths out for a second and will go to 3500 rpm [sort of acts like a backwards gas peddle revs from floored to idle as opposed the the normal way....but then it dies after a few seconds while idling, will run forever but crappy as described but ONLY IF IT'S FLOORED!
codes I have are low voltage to fue pump relay...maf sensor [replaced it] map sensor [replaced it but still have the code after clearing it] tp sensor out of adjustment code [but got that code when I adjusted it]
my guess at this point is a fuel pump but wanted opinions on this