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I'm imagining you used the injectors and ECU from the 97? And the intake, throttle body?
I would do a running check on fuel pressure at the rail especially if you used the fuel pump and filter from the 93.
I'm doing that next week if weather permits on my single cab, I bought a schrader valve adapter to 1/8 NPT female adapter and will be using an electronic gauge but you could use a regular gauge if you are brave and don't mind a fuel line running into the cab just for testing.
Good injectors can appear bad if not fed properly. The weakest injector will start messing up first.
My DD is pinging now at acceleration, it is a 4.0 OHV. Haven't even started to diagnose that LOL.
Yes, I used all the fuel system components that came with the 97 engine, especially since they were all lower mileage and appeared to be in good condition.
You know though, I was considering doing just the exact thing you mentioned with the fuel pressure test.
Reason being, the more I've been thinking about it...the truck has always died when coming to a sudden stop anytime its below 1/4 of a tank....with out fail it will do it. It did this with the original motor too.
Pulling the bed and changing out the pump and pick up screen is just one of the last things I hadn't gotten around to yet (I have however, changed the in-line fuel filter recently)...been so busy working out other bugs first!
I was thinking maybe when I'm getting into that high demand fuel load, the pump isn't able to keep up, thus causing the possible lean condition I'm experiencing around 2500 rpm? (Not sure about the 2100 vibe though?)
I suppose the 2100 rpm vibe could be the beginning feeling of an imbalance in the injectors just starting to show up due to insufficient fuel supply?
Hmmmm.....
Thoughts?
Last edited on Fri Apr 5th, 2019 12:46 pm by Vincenthdfan
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1993 Ford Ranger XLT Supercab
4.0 OHV V6 4x4
Converted it to 5 Speed and Manual Transfer Case!