94 s10 blazer, multiport,,,
new iac because is gave theengine code of 35and fuel pressure regulator because i smelled excessivefuel,no carbon in egr, no dummy codes being seen since the iac replacement but no change.

blazer will start to miss at first but later, it gets so bad to point while it is in park, I can rev up the engine and will act justlike it hasa rev limiter , it won't run for crap down the road for surging and threatening to cut completely off. the other night it quit in the garage and would not even start back........pulled a plug to see if it had fire and it did and there was fuel pressure...ruling out the pump.

any ideas

 

possible fuel filter....had a 4.3 s-10 that did that.....I never checked the fuel pressure though, just tried the filter and that happend to be it...cheep to try ..that and couldn't hurt