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Old September 29th, 2009, 02:34 PM   #1
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zj hard start


howdy. my buddy has a 94 zj that the fuel pump doesnt want to turn on when his engines cold. after it's warmed up it starts fine. i was thinking selenoid but i dont know much about grands. is the selenoid in the gas tank with the pump or somewhere else.
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Old September 30th, 2009, 09:19 AM   #2
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So if I understand this from what you are saying, there is no power at the pump when it's cold but there is when it's hot??? A common problem that I've seen in ZJ's is that the pump does not keep it's line pressure and will bleed down after it sits a while, thus causing you to have to crank and crank when it's cold to get it started. The reason it would start when it's warm is because most of the fuel pressure is still there. I would think that maybe his fuel pump/module is on it's way out.
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