Running difficulties
#1
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Hello everyone,
My 99 cherokee has been doing some strange things.
When I got it it starts on the first crank and runs nicely. Now it takes a 3-4 cranks to start and has been running rough and dieing while idling sometimes. It runs very rough to where the whole jeep shakes. It has been a project for over a year now and hasn't moved much. The mileage is hasn't gone up since I got it.
So I wanted to ask what you all think my issue is with it running? I'm thinking carbon buildup, sparkplugs, or something jammed in the exhaust. I just put a new one on after about 6 months and it has been blowing water out the end when it starts. I was also thinking the timing might be off or the distributor.
Any help would be greatly appreciated.
My 99 cherokee has been doing some strange things.
When I got it it starts on the first crank and runs nicely. Now it takes a 3-4 cranks to start and has been running rough and dieing while idling sometimes. It runs very rough to where the whole jeep shakes. It has been a project for over a year now and hasn't moved much. The mileage is hasn't gone up since I got it.
So I wanted to ask what you all think my issue is with it running? I'm thinking carbon buildup, sparkplugs, or something jammed in the exhaust. I just put a new one on after about 6 months and it has been blowing water out the end when it starts. I was also thinking the timing might be off or the distributor.
Any help would be greatly appreciated.
#4
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Year: 1988
Model: Cherokee (XJ)
Engine: 4.0L
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How long did it start and run nicely after you got it? What other work have you done/been doing?
Like exasemech says, your gas is likely bad anyway so you should replace it. Possibly the fuel filter too.
Some water blowing out the tailpipe after startup is normal as condensation can form in the exhaust. However, this should clear up after a few minutes.
Timing is not adjustable.
After you get some clean gas in it, check your fuel pressure.
Like exasemech says, your gas is likely bad anyway so you should replace it. Possibly the fuel filter too.
Some water blowing out the tailpipe after startup is normal as condensation can form in the exhaust. However, this should clear up after a few minutes.
Timing is not adjustable.
After you get some clean gas in it, check your fuel pressure.
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#7
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The gas is about a month old with a heat fuel treatment to get rid of water. I have had the valve cover off a few times and just put on a new gasket as of a few days ago. Other than that and the delete pulley I haven't done anything to the engine besides general maintenance. It ran nicely when I got it with only the occasional cylinder 4 misfire I'm sure every xj has. I haven't gotten into serious stuff in the engine like spark plugs or injectors.
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#9
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Year: 1987 MJ, 1973 J2000, 1986 XJ, 08 JK
Model: Comanche (MJ)
Engine: 4.0L H.O
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What's the inside of your throttle body look like? Carbon buildup could have gummed up your IAC and I can tell you from a recent experience, sticky gummed up IAC is no good for idle
#10
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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Plugs, wires, cap and rotor are to be replaced every 30,000 miles along with cleaning the throttle body.
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