pederl

Did you check the ballast resistor?

My 1989 4.0L Comanche runs REALLY rough, if I bypass the MAP sensor it runs better, I tried a new on and it does the same thing, If the MAP sensor is good, why does it run like crap when it is connected, any ideas??? Thank you.

A 1989 4.0L base Comanche

Has anyone extracted info from the ECM buy shorting terminals 6 and 7?

Sorry, vacuum hoses

Can someone please send or show me a diagram for a 1989 4.0 L Base Comanche. I have some hoses that are not connected. Thank you.

In the 3rd pick you see those yellow connectors, if I connect those to a computer would it be able to tell me anything, or was a 1989 too early?

It is a 1989 4.0 base model.

AC works. The truck is very hard to start, and when it does it runs very rough, I have to give it gas or it dies. If I spray starting fluid into the intake it runs like a champ. I have replaced: Throttle position sensor Idle speed motor Knock sensor Spark plugs, wires, distributor and cap Fuel pump and fuel filter Battery

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I also cleaned the idle speed motor and the oxygen sensor.

I have replaced the rotor and cap. It is a manual and it starts ok, but it runs really rough.

Question, I have a 1989 4.0, do I have a choke, my engine will start but not very good. New fuel filter, plugs, wires,

Thank you, I will look at it tonight.

Sorry, IAC is what?

Brand new. Any other ideas?

The truck is running but it runs like crap, I have to keep giving it gas or it will die. I have changed the plugs, wires, rotar and cap, fuel pump. I has to be a sensor, correct?

Where can I find a test connector for my 1989 jeep Comanche? I have a Vetronix tester model tech 1A but none of my connectors will fit.

Yes