Question about 1995 Jeep Wrangler

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95 2.5 jeep wrangler stalls consistantly and will restart after 20-30 minutes. i've replaced fuel filter and fuel pressure regulator, cleaned cam and crankcase position sensors, checked fuel line and return for leaks and ihstalled new vacuum lines between canister and regulator and between throttle body and map sensor. fuel pressure goes to 39 on start and immediately bleeds to zero which indicates bad diaphram. fuel pressure is 64psi when running which indicates bad fuel regulator(which is why i relpaced it). relay replaced, and check engine codes battery disconnect from pcm. check engine light comes on when car starts so computer is good. can't understand why fuel pressure is haywire. HELP

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  • chuckieo Nov 15, 2009

    problem solved, i hope. couldn't figure out the high fuel pressure so i tried dto blow out the return line. it was blocked. traced blockage back to tank. dropped tank a couple inches and the line cleared. jeep started , fuel pressure right on the money; with and without vacuum. trial drive A-OK. so far so good. thanks to all for your input it narrowed down the problen and i got lucky. thanks again

  • chuckieo Nov 18, 2009

    jeep still stalls. rats. it must be the fuel pump. could anything else make the fuel pressure bleed off. on the off/on test fuel pressure jumps to 39 psi, then immediately goes to zero. when started jeep holds 39 psi. until turned off-0 psi. has to be check valve(diaphram) on fuel pump---doesn't it?

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I had the same issue with my 4.0, I went through all the same BS you did and in the end it was a faulty fuel pump. Pricy i know but im sure thats your problem

Posted on Nov 15, 2009

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