Question about 1996 Jeep Grand Cherokee

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I have a problem with my grand cherokee laredo v8 1998 the problem is when its on idle it idle perfect buth sudenley the pump star making a noise and the noise goose high the fuel preshure drops and the engine stops or it start thumbling wath kuth that bee thanks

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Ok, 2 things are happening, the most obvious is that you are low on fuel the pump spins faster, becauase there is no fuel to pressurise the lines

secondly, and more likely the fuel pump is failing, it is called cavitation. the pump pressurises the lines and there is enough fuel to keep the engine alive at idle, or at 5,000 revs. however, if the pump is failing it is only pumping enough to keep it at idle, and not enough to keep up with the demand of higher engine speeds.

soon enough, the pump will fail altogether, and and the engine will not start

Posted on Jun 11, 2010

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Posted on Jan 02, 2017

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I have a 1996 jeep grand Cherokee Laredo. it began to stall at idle and now will not start


Check audibly the fuel pump. It will run for 3 seconds when ignition is turned on, but engine not started. If it makes noise, you could check for pressue at the fuel rail. There is normally a schrader valve you can press. Tske care, fuel under pressure will come out when pump is ok.
if ok, check for eventual fault codes with scanner.
could be crank sensor.

Nov 02, 2013 | 1996 Jeep Grand Cherokee

1 Answer

I have a 2002 4x4 Grand Cherokee Laredo 6 cyl. automatic. Engine sounds like the engine is idling high but it is only 700 RPM.at idle. Does this sound like a harmonic balancer?


It may be the radiator fan making all that racket. Usually when the engine is cold, the thermal fan clutch allows more "slip" --- this allows the fan to turn slower than the water pump pulley (less load on the engine). When the fan clutch detects more engine heat, it reduces slippage of the fan clutch and this results in the fan turning "faster". It's actually turning at the same speed as the water pump pulley. The "roaring" noise is the result of the fan pulling in more air through the radiator.

If the noise is present at all times, whether or not the engine is hot or cold, then the fan clutch might be malfunctioning.


I hope this helps.


Have a nice day !!!

Apr 08, 2011 | 2002 Jeep Grand Cherokee

3 Answers

I have a Jeep grand cherokee laredo and i have installed a new fuel pump and fuel filter but it will not start i have checked all fuses and relays please help.


Having same issue with my 2000 grand cherokee. sometimes fuel pump will prime and car starts the other 50% of time no fuel pump noise only smaller radiator fan will come on and make vibrating whining noise. I have changed out fuel pump and filter as well as checked and ruled out all fuses/relays involved. Need help too

Aug 04, 2010 | 2000 Jeep Grand Cherokee

1 Answer

The problem is that the when you start te motor its start everything work good buth sudenley in start tumblin there is a noise coming from the feul pomp the pump increese of speed like the thank is empty...


im trying to understand your english and i can not understand what your are telling me??????????but try the pump solinoid its sounds as if its gone.adrian,,,,,,,,,

Jun 13, 2010 | 1995 Jeep Grand Cherokee

1 Answer

Hi mine name is edgar muskus ok a havea problem


Change your fuel Filter. Start there,If that does not work you can drop tank and clean up screen. if that dont work then id go with regulator. I would do fuel filter first

Jun 15, 2010 | 1995 Jeep Grand Cherokee

1 Answer

2002 grand cherokee laredo humming/grinding


sounds like you have a problem with one of your lines on your power steering or one of its components. the grinding noise could also be one of your pulleys that have gone bad too. check your steering assemby gear box.

Jul 26, 2009 | 2002 Jeep Grand Cherokee

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