Have you checked for codes? fuel pressure correct? Same colde as warmed?

Answered by Docfixit (expert)
18,443 answers provided

Fuel pressure was 49 psi. Only code that shows is MAP sensor, which I replaced, but code still comes up. & yes, runs same cold or warm

Response from CSA1
5 questions asked

See diagram Dist look like it? if yes remove TFI have tested VERY prone to cause problems.

Answered by Docfixit (expert)
18,443 answers provided

What diagram? & What is a TFI?

Response from CSA1
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that fuel pressure is whyll the problem is happening?

Answered by cadieman (expert)
2,862 answers provided

fuel pressure good 45 psi

Answered by Docfixit (expert)
18,443 answers provided

As far as I can tell, fuel pressure to engine is ok, it seems to get plenty of fuel. Shows 39 PSI at the post on the fuel rail. (miss typed the last one, not 49) As long as you give it gas, it runs great. has a little miss, but once you let it idle or hold at a steady speed, it surges, & bucks like a mule.

Response from CSA1
5 questions asked

no TFI Module on this distributor

Response from CSA1
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Truck is late 94 so Dist has shutter vane and ICM see diagrams locate and have ICM tested

Answered by Docfixit (expert)
18,443 answers provided

Had Ignition module tested, passed ( cycled 25 times )
Would the IAC cause this problem? I know it might at idle, but would it cause the problem while driving as well?

Response from CSA1
5 questions asked