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Discussion Starter · #1 ·
I have a 1993 4.0L YJ that I am having a tuff time getting it started. I can get it started, but to do so I must put the gas pedel to the floor. I dont have to do it every time just 95% of the time, so pretty much every time. Once started it runs prefect other than it kinda has a low idle. I have changed spark plugs and wires, cap and rotor and changed the fuel and air filter. Any help would be great.
 

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Your fuel pressure regulator has gone bad. It is located at the front of the fuel rail. Had the same problem myself. It is about the size of a half dollar with a single hose leading to it. They are about $90. Good luck!
 

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Discussion Starter · #5 ·
theamazingbeas said:
Your fuel pressure regulator has gone bad. It is located at the front of the fuel rail. Had the same problem myself. It is about the size of a half dollar with a single hose leading to it. They are about $90. Good luck!
Thanks for the help, I'll give it a shot
 

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I had a 4.0 doing the same thing, I changed the throttle control sensor and idle control sensor and fixed the problem, easy to replace, if the regulator does not work try the sensors.
 
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