WEILL NOT RUN

1987 Jeep Comanche

Tiny

JCarey

July, 9, 2011 AT 9:28 PM

I have a 1987 Jeep Comanche Pioneer, 4.0 6cyl, 5 speed man, 4X4. I have replaced the following parts: fuel pump, map sensor, fuel regulator, TPS sensor, mat sensor, cam sensor, crank sensor, electronic igniter, all relays, , ECM. It will start and idle, but if you accelerate it dies. Any ideas?

FOUND 1645 RELATED QUESTIONS

Cam Sensor

72 ANSWERS
2 IMAGES

5 Answers

Tiny

Wrenchtech

July, 9, 2011 AT 9:51 PM

It might be time to stop throwing parts at it and doing some diagnostic testing. I would start with the fuel pressure.

Tiny

JCarey

July, 9, 2011 AT 10:07 PM

I think I have sufficient pressure because I replaced the fuel pump and added a second booster pump after the fuel filter.

Tiny

Wrenchtech

July, 9, 2011 AT 10:11 PM

No wonder you're having problems. What is the current fuel pressure?

Tiny

JCarey

July, 9, 2011 AT 10:19 PM

I don't know, I don't have a gauge, but I replaced the regulator today. The booster pump is a 60 psi max, 31psi at idle.

Tiny

Wrenchtech

July, 9, 2011 AT 10:22 PM

I'm sorry. That's not the way we work. The vehicle requires a specific fuel pressure.

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