01 xj Starts but wont restart unless it sits
#1
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Model: Cherokee
01 xj Starts but wont restart unless it sits
So I just bought my first xj 2 days ago from a co worker and it started right up and runs great but when you turn it off it wont fire up again unless you let it sit for half a day, it will crank and crank and crank but but wont fire up unless you let it sit, I replaced the cps on it and I can smell gas in the intake after trying to restart it, it has a 4.0 in it any ideas on what it could be?
#2
Try to pull code.
Check for the spark.Because normally a faulty ignition coil can give problem like this.
last time i used to have this problem.When the engine hot wont start and also will stopped the motor after drive like 2 km.This might be to ignition problem so check from ignition coil to spark plug.
Check for the spark.Because normally a faulty ignition coil can give problem like this.
last time i used to have this problem.When the engine hot wont start and also will stopped the motor after drive like 2 km.This might be to ignition problem so check from ignition coil to spark plug.
#3
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Year: 1999
Model: Cherokee
Engine: 4.0
This would be considered "thermal failure" of some sort. Here is how I would approach it.
1. Use a code reader or a scan tool and see if there are any "stored" or "pending" codes.
2. Do you have the exact same symptoms with the old and the new crankshaft position sensor?
3. A couple of engine management sensors that come to mind with your situation (after the crank sensor) would be the camshaft position sensor and the coolant temperature sensor. Both can be tested with a manual and a meter.
4. Verifying spark (test coil rail) right away when with a hot engine when it won't start, is a good idea as already mentioned.
1. Use a code reader or a scan tool and see if there are any "stored" or "pending" codes.
2. Do you have the exact same symptoms with the old and the new crankshaft position sensor?
3. A couple of engine management sensors that come to mind with your situation (after the crank sensor) would be the camshaft position sensor and the coolant temperature sensor. Both can be tested with a manual and a meter.
4. Verifying spark (test coil rail) right away when with a hot engine when it won't start, is a good idea as already mentioned.
Last edited by tjwalker; 01-24-2017 at 12:43 PM.
#4
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Year: 1985
Model: Cherokee
Engine: 2.5L
I don't know that much about the 4.0, but I have a 4.9 in my F150 that has a leaky injector and it behaves in a similar manner. After short periods of turning the engine off the injector will leak fuel into the intake and flood the engine. Let it sit long enough that the fuel evaporates and all is fine. I have gotten it to start before by holding the throttle wide open while cranking just like with a carb engine and it will eventually clear out and fire up.
#6
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You need some hard data. Start with taking the fuel pressure. If not enough you won't fire. If it bleeds off too fast after shutdown your pump regulator or injector is leaking.
You say cps, do you mean crank position sensor or cam position sensor? Cam sensor and crank sensor must be Mopar ONLY replacements.
You say cps, do you mean crank position sensor or cam position sensor? Cam sensor and crank sensor must be Mopar ONLY replacements.
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Cps the first time I meant crank sensor, and I just replaced the cam sensor and she fired right up! And I went mopar for cam and crank sensor. Thanks for all the help!
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#15
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Year: 1999
Model: Cherokee
Engine: 4.0
After that point, only a code reader or a scan tool can pull codes.