Fuel Problem

MCAVINEE

MEMBER
2000 JEEP GRAND CHEROKEE LAREDO
6 CYL
4WD
AUTOMATIC
100,000 MILES

2000 Jeep Cherokee Laredo has a fuel problem. MOtor will start and just sputter for a few seconds and die. Pressing the gas pedal it just dies. Changed the fuel filter yesterday and the fuel pump in 09. Fuel pump hums and the fuel rain has pressure, although not forceful pressure I guess. Sitting overnight the Jeep will start and run for a couple hours and then goes back to these symptons again

3 Replies

CJ MEDEVAC

MECHANIC
11,005 POSTS

I'm more of an older CJ kinda guy!

I do try to keep up with the new stuff too!

You really do need to check your pressure with a gauge, especially during the "no runny time". Also check for spark at the same time.

Does Check engine light, illuminate, when you 1st crank? Does it remain on?

I sorta modified my oil pressure "remote test gauge" to serve as a fuel pressure gauge also--installed an "air chuck" on the end. Primitive. Inexpensive. But it works!

Your Turn

The Medic

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Sunday, June 19th, 2011 AT 1:18 PM

MCAVINEE

MEMBER
69 POSTS

Engine lite illuminates but does not stay on. For example, yesterday I replaced teh fuel filter thinking this was the problem. The Jeep idled for half an hour while I mowed the front lawn. I turned it off and it started again without issue. Drove is a couple miles no issue. My son then drove it approximately 20 miles to his home and when it went to leave it just sputtered when starting and would not accelerate at all when you tryed to. Left it sit all day and still the same issue, just sputters when starting and will sputter for a couple second and goes off. I did notice that the rpms will increase when you pump the pedal excessively while it is running but when you let up, it dies. Fuel pump was changed in 09 and we can hear it humming. When I pressure the pressure rail component, gas comes out but the pressure is not real strong. Should I replace the fuel pump again?

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Sunday, June 19th, 2011 AT 1:35 PM

CJ MEDEVAC

MECHANIC
11,005 POSTS

Again, during the "SICK JEEP PERIOD", check the fuel pressure w/ a gauge, and check for spark!

As far as "Slingin' a Part at it" (without testing, previously mentioned, 1st thing in my head!)I have seen many times, on here, over 2 years."Bad Crankshaft sensor!". This would be a "No Spark" problem

If you install one, follow it's directions

Keep us informed

The Medic

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Sunday, June 19th, 2011 AT 1:48 PM