F150Swartz

i posted earlier this weekend of my brothers truck not starting at all, found out it was just plugs, so put 8 new plugs in it and it started firt turn of the key, today it ran fine when we took it out of the garage went up the street and back and pulling in the driveway again when i let off the gas it died, had trouble starting it but we got it, we got it back to the garage and it died again, 20 mins later went out and it started and ran fine, shut it off then started it again and it wouldnt stay running.... any suggestions? thanks, its a 1992 5.0

87fordboy

my 87 f150 is doing the same thing its got the 302 5.0

flareside_thunder

Pull codes, www.fordfuelinjection.com Me thinks it may be a toasty TFI module....you can pull it and get it tested for free at an auto parts store....pull codes first though.

F150Swartz

how do i pull codes? there is no engine light on.... and where do i fint the tfi module? thanks

rwfireman

Check out the sticky at the top of the forum on how to pull codes.

gassign94

it probably wasn't the plugs to begin with unless the old plugs were really worn or fouled w /carbon . the good thing you don't mention anything about the engine running bad while it is running . it also started first time after the plugs replaced . try a fuel additive I like to use Lucas . also spray the throttle body w/ a cleaner . this may overall improve the problem . it is a possibilty the throttle position sensor ( T P S ) is going out . also consider replacing the fuel filter along w a additive that removes water from the tank - not sure if lucas does.
hows the air filter ? what about torn air intake hoses where you can't see.
good luck let us know what you find out .

flareside_thunder

Go to the link I posted the last time...it tells you how to check for codes. The light doesn't need to be on to store codes in the system. The TFI is mounted on the driverside fenderwell.

F150Swartz

the tfi module... is it just the black piece and not the aluminum fins?