93 LX FiveO

TFI module

mjr46

oh really???? without a multimeter to test the VREF CIRCUIT TO THE map which is the first test in the troubleshooting tree you can't confirm or be sure of anything..without a multimeter you won't be able to test the correct operation of the map and it's circuitry as for your start up and die prob on first try I'd put a fuel pressure tester on it and check for bleed down ..could have a bad check valve in pump or inj leaking down... the code 22 and start up issue are probably not realated but then again take it one thing at a time

camaroeater

I don't think the startup and code 22 are related either...thats why I'm not concerned with the code 22 have read that it might be a ghost code and others that had a bad MAP Sensor have not had the symtoms Im having. I just want it to fire right up, its frusterating to have the car running perfect, but it won't fire right unless it sits for1.5 hours. This problem came after O/R h and header install, but was most likely there before and when the back pressure was reduced it unmasked the problem. I'll do a fuel pressure check when I can afford the gauge...thanks Mjr46.

fordlover79

if you jacked up the motor check the grounds they do some wierd **** when not connected or not good enough

camaroeater

I have thought about the grounds...where are they? The only thing I checked was the neg. battery cable to engine...it was slight loose, so I diconnected, cleaned and reconnected.

fordlover79

check the back of the left head or back of the intake to the firewall there's a series of them including one from the injectors to the firewall