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Old 04-19-2015, 10:38 AM
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yj starting problems

I have a 1989 jeep YJ 2.5L with a 5 speed and it is a 4x4 - here is the problem. If it sits for more than one day without starting, it has a very hard time starting. It cranks but will not fire. Sometimes I have to pump it like mad to start it and other times I have to add gas down the throttle body. Once started, it starts every time and if I start it daily, works fine. It has been tuned up, changed injector and fuel filter but still have the problem. I live in charlotte N.C. and trying to find someone who workes on older jeeps not easy, any help would be greatly appreacated.

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Old 04-20-2015, 08:34 PM   #2
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Its fuel injected, so pumping it like mad is just that. Mad. It doesnt do anything like in a carburetor that has an accelerater pump.

Check fuel pressure. It could be the fuel pump is worn out. Or the tubing inside the tank has fallen apart fron age or methanol exposure.

Another possibility is a bad throttle position sensor. That may cause your pumping to give enough momentary signal to start.
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