FUEL or ELECTRICAL problem?

Metalhead_24 · Apr 14, 2009

hi,

I have a 93' ford bronco 351w 5.8 .... it was sitting a while befor i baught it.....I've changed the all the filters . It will stall out on me when i stop and go to press the gas again. to get it running again i got to hold the gas to the floor ... it starts up really rough. I took it to a machinic and he said the mapping senor was bad so i put a new one in. It's still doing it just not that often. I've changed the all the filters . i'm thinking it might be the fuel pump but not sure....

BroncoJoe19 · Apr 14, 2009

Sounds like a dirty sticking IAC

Check and clean your IAC

http://www.fordfuelinjection.com/?p=39

IF that fails, look for vacuum leaks, and if that fails... pull diagnostic trouble codes.

Shadow_D · Apr 15, 2009

when the truck is idling, does it have a "wet" firing sound?

Do you see black or dark smoke from the exhaust when you get it running after it stalls?

Metalhead_24 · Apr 16, 2009

Shadow_D said:
when the truck is idling, does it have a "wet" firing sound?Do you see black or dark smoke from the exhaust when you get it running after it stalls?

it had a wet firing sound the last time it happend but no dark or black smoke... it was just thick

Metalhead_24 · Apr 16, 2009

BroncoJoe19 said:
Sounds like a dirty sticking IAC
Check and clean your IAC

http://www.fordfuelinjection.com/?p=39

IF that fails, look for vacuum leaks, and if that fails... pull diagnostic trouble codes.

i've replaced that when i first baught it .. but there is an adjustment on it tho . there was a vaccum leak befor but i fixed it .

the vaccum leak was making it idle too high. i'm going to take a look at the adjustment on the IAC and let you know.

thanks

Shadow_D · Apr 16, 2009

I'd be willing to bet your fuel pressure regulator is going bad... I had this happen to me not too long ago and that solved most of my problems. IIRC they aren't much more than $20 - $30...

FUEL or ELECTRICAL problem?

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