my 86 crown vic want stay running i changed fuel pump but for some reason when the pump is hooked up it want start but if i unplug the pump it a fire up an run for a lil bit i need help.
have you looked at your fuel pressure regulator at all, it is a diaphragm with a vacuum connection to it, on or just before the fuel rail...perhaps this is disconnected and givin' too much pressure....those butyl rubber vacuum hoses are cracky and leaky too~ replace with silicone vacuum lines~
Did you replace the fuel filter and FP relay also? Check the low oil pressure switch and check the inertia switch both of them can really give you a headache.
Everything is new pump tank and filter
Looking for a Used Crown Victoria in your area?
CarGurus has 1,392 nationwide Crown Victoria listings starting at $1,700.
Search Ford Crown Victoria Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford Crown Victoria Experts