Question about 1992 Jeep Cherokee Briarwood

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Wont start in the morning

I have a 92 cherokee laredo it will not start in the morning. but once i get it started it will start and stop all day long. It is to the point of almost the battery going dead before it will start i have changed the ignition coil . some one told me it was the neutral saftey switch but that doesnt do anything for it.in the morning. it will crank but right before it starts the maintinence required and the check engine light will come on

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  • tinkpeanut Oct 21, 2008

    i have same problem but now she just wont run just keep cranking over

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Hello, My name is Curt and Im a mechanic in Nevada.

Your problem can be one of 3 things.

1. Your Fuel pump is weak or shot. When they wear out, they can let the fuel run back to the tank, if not being used for several hours. (lower temperature outside will worsen this effect) therefore your fuel line is empty now you have air in there instead of fuel and the system has to bleed out the air. or

2. Beings that it is fuel injected, you have a small diaphram valve on the fuel pressure rail. This valve lets extra fuel return to tank. If this is stuck then some or alot of your fuel that should be building pressure for the injectors is goin back to your fuel tank. While this saves on fuel, it doesnt let the engine run real well. <-----joke. This would be why your Jeep takes for ever to start....It's having trouble pressuring up your injectors. Without enough pressure, the injectors wont open.

3. This one is unlikely, but I have seen it twice. Check your distributor cap. Sometimes moisture collects after being not run for a bit. If this happens the spark wont go through the cap to the plugs till it dries up from the heat in the spark thats dancing around in there while you spinning the motor forever.

Hope this helps. Also to see if its a fuel issue, Plug the return Line going back from to the tank from the return valve if it starts up quick, then thats your problem, if theres no fuel or little fuel then, check your fuel filter and pump.

Posted on Dec 17, 2008

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