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88 with intermittent "misfire"


Djurs02

Member
Joined
Jun 25, 2013
Messages
11
Vehicle Year
1988
Transmission
Automatic
Hey guys,
I'll do my best to keep this as short as possible.
Put a junkyard motor in about a year ago and has run great. Recently though, I have been having an issue. Initially the truck ran really sluggish after driving an extended period on the freeway. It has since built up to a constant on/off issue every minute over so. The truck loses power and has recently started dying.

What I've done-
Cap/rotor
Complete distributor-out of old motor
Plugs/wires
Fuel pressure regulator
New TPS
Cleaned throttle body
Swapped out injectors with one from old motor
Fuel pressure is 28 when it's running good at idle
36psi WOT

I assume the fuel pump but can't be sure.
Any help would be amazing.
David
 
I'd suspect that or a filter....
 
Both fuel pump, sending unit and both filter took care of it.
Thanks guys
 

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