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Discussion Starter #1
I’m experiencing for the first time a starting issue on my 1999 TJ Sahara, 4.0, 5 spd, 94,000 miles. When I turn the key to start it, it cranks the engine just fine but it won’t fire up. When I turn the key a second time it fires right up and runs like a champ, like always. It’s never done this before in the 7 years I’ve owned it. Just wondering if anyone else has had this happen? Could it be a weakening fuel pump, throttle sensor, PCM, or ? Thanks for any information anyone can offer based on their knowledge and/or experience.


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If you cycle key on off on off on with 3-5 seconds in on each time before you start does it start normally
This gives multiple priming runs of fuel pump

If that makes it start quickly first try it is a failed check valve in the pump/regulator in the top of the fuel tank


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Thanks Digger. I’ll give that a try in the morning. Appreciated.


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Looks like I may need to procure a check valve. Thanks Digger. Also, it’s been awhile since I have posted here. Also own a JL now. Was wondering if Jerry Bransford is still offering his keen insights on this forum?


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Jerry is Still on intermittently

An add on in-line check valve is very problematic in a TJ thus a very bad idea
Leads to overpressure fuel leaks and potentially turning your tj into a bonfire

Works good in a YJ as that rail has a return line


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