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2003 Jeep Cherokee

Engine Mechanical problem
2003 Jeep Cherokee 6 cyl Two Wheel Drive Automatic 85000 miles

My 2003 Jeep Grand Cherokee takes a long time to start. It must crank several times before it fires up. And when it does it runs extremely rought until I goose the gas pedal. It has never done this before. I recently had the throttle position sensor changed. I'm concerned I'm going to kill the starter with all the cranking.
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McD3
June 26, 2010.




Hi there,

Thank you for the donation,

Run a scan to check for any unresolved fault codes, also check static fuel pressure, I feel that the rail pressure is low and when it starts it is starving for fuel, you may have a faulty pressure regulator or a fuel pump that is back draining.

Mark (mhpautos)

Mhpautos
Jun 27, 2010.
Last night switched key on and off 5 times and the car started fine. It hadn't run all day. I have no test guages or instrumentation to check codes. No " chk engine" light btw. I'm going to change out the fuel filter/regulator today. Any special trick to taking off the fuel lines from this sucker? One pops off easily but the others have a shiny chrome cap that doesn't look like it will come off easily.

Tiny
McD3
Jun 27, 2010.
Not a jeep tech, just been working the theory on your problem, I will see what I can see about this connection, more than likely there is some special release tool required, don't force it as if it breaks it will probably be a months wages to replace.

Mark (mhpautos)

Mhpautos
Jun 27, 2010.
Forgot to thank you Mark for your help.

So today neighbor helped me change out the fuel filter/regulator. Still having start issues but will see if once the computer settles down after the power off (batt disconnect) the starting issue clears up.

Thanks for your advice. My DIY days go back to putting headers and a Holly on a 73 Mustang. Boy have times changed.

Tom McD
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Tiny
McD3
Jun 27, 2010.
You most welcome, yes, times have change, I go back some 35 year in the industry, so I can relate to what you say.

Mark

Mhpautos
Jun 28, 2010.

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