Question about 1999 Jeep Grand Cherokee

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1999 jeep grand cherekee has problems starting the more i drive it. we have done a tune up, change the fuel pump, fuel relay and fuel regulator. what else could it be?

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  • 154 Answers

I would check the pcv valve and fuel filter.

Posted on Apr 23, 2010

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1 Answer

Changed crank position sensor, fuel pump and fuel filter and my 2001 jeep still takes a long time starting what can be the problem


have you done a leak down test on the fuel system?a leaking regulator can leak down as well as a stuck injector

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1 Answer

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check the fuel pump fuse/relay, could be just bad enough to cause an intermittent start/no start. and check fuel pressure,spark and the crank position sensor.

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2 Answers

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Also check the vaccum hose from the fuel pressure regulator to the intake manifold, it is right on top, to the front right of the valve cover where the fuel lines attach to the fuel rail, there is a small vaccum hose that runs from the regulator to the intake manifold, I have a 93 grand cherokee limited w/ 4.0L 6cyl, it was hard to start at times, wouldnt start at times without starting fluid spray and had your symptoms at idle, running rough like it wanted to stall like it was out of gas, I had various opinions ranging from fuel pump was bad to the fuel filter to the fuel presure regulator, the fuel pump relay ,etc....after replacing the relay and having the same symptoms, some digging brought me to this vaccum hose, wich had a break in it, when it was replaced it allowed the regulator to have the correct fuel pressure output and solved all the afforementioned problems way cheaper than the suggested alternitives. good luck.

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1 Answer

1999 Jeep Grand Cherokee stalling and not starting


Since you've replaced many of the usual suspects (fuel pump etc.) you might want to look into testing or simply replacing the crankshaft position sensor or the camshaft position sensor. If you intermittently lose one the these signals it would cause the problem you describe.

Feb 05, 2009 | 1999 Jeep Grand Cherokee

1 Answer

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Sound like fuel pump. Need to check fuel pressure. It seem to be finally getting back up to the motor, then starting up. Try parking the front of the car down hill and see if it starts up a few days in a row????

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1 Answer

1999 jeep c. 4.0 litre engine. Fuel drips from muffler wont start


How is this car running? Remove the vacuum line from the pressure regulator on the fuel rail and check to see if there is any gas coming out of the line. If you see gas then the regulator is bad.

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