No idol at start
#1
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Model: Cherokee
No idol at start
2000 xj 4.0
Problem: to start my jeep I have to press down on the skinny pedal and get the RPMs spinning around 3 grand and slowly set them down to idol while I turn the key or it will just turn over, start, then immediately die when it tries to idol.
Things I've already tested:
I pressure checked the fuel rail that goes to the injectors and it was all good, however I have not pressure checked the pump yet and from what I understand my year xj has no fuel filter.
Already replaced both the alternator and battery because they were both bad, and I checked them both under a load and they are good,
Cleaned all body and engine grounds of corrosion and dirt.
Checked mass airflow sensor and all throttle body connections for corrosion and resistance.
There is another odd thing happening, when I turn my key to the on position the relay controlling my auxiliary fan switches on and off which leads me to believe it is an electrical problem or possibly a PCM problem witch is related to the no idol problem.
Meanwhile I'm trying to not disconnect my battery because I have been running a 10 day inspection for the past 2 months and every time I disconnect it I have to drive to rid my system of the not readys
Problem: to start my jeep I have to press down on the skinny pedal and get the RPMs spinning around 3 grand and slowly set them down to idol while I turn the key or it will just turn over, start, then immediately die when it tries to idol.
Things I've already tested:
I pressure checked the fuel rail that goes to the injectors and it was all good, however I have not pressure checked the pump yet and from what I understand my year xj has no fuel filter.
Already replaced both the alternator and battery because they were both bad, and I checked them both under a load and they are good,
Cleaned all body and engine grounds of corrosion and dirt.
Checked mass airflow sensor and all throttle body connections for corrosion and resistance.
There is another odd thing happening, when I turn my key to the on position the relay controlling my auxiliary fan switches on and off which leads me to believe it is an electrical problem or possibly a PCM problem witch is related to the no idol problem.
Meanwhile I'm trying to not disconnect my battery because I have been running a 10 day inspection for the past 2 months and every time I disconnect it I have to drive to rid my system of the not readys
#2
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Join Date: Aug 2012
Location: Goshen Ohio
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Year: 1993
Model: Cherokee
Engine: I6
2000 xj 4.0
Problem: to start my jeep I have to press down on the skinny pedal and get the RPMs spinning around 3 grand and slowly set them down to idol while I turn the key or it will just turn over, start, then immediately die when it tries to idol.
Things I've already tested:
I pressure checked the fuel rail that goes to the injectors and it was all good, however I have not pressure checked the pump yet and from what I understand my year xj has no fuel filter.
Already replaced both the alternator and battery because they were both bad, and I checked them both under a load and they are good,
Cleaned all body and engine grounds of corrosion and dirt.
Checked mass airflow sensor and all throttle body connections for corrosion and resistance.
There is another odd thing happening, when I turn my key to the on position the relay controlling my auxiliary fan switches on and off which leads me to believe it is an electrical problem or possibly a PCM problem witch is related to the no idol problem.
Meanwhile I'm trying to not disconnect my battery because I have been running a 10 day inspection for the past 2 months and every time I disconnect it I have to drive to rid my system of the not readys
Problem: to start my jeep I have to press down on the skinny pedal and get the RPMs spinning around 3 grand and slowly set them down to idol while I turn the key or it will just turn over, start, then immediately die when it tries to idol.
Things I've already tested:
I pressure checked the fuel rail that goes to the injectors and it was all good, however I have not pressure checked the pump yet and from what I understand my year xj has no fuel filter.
Already replaced both the alternator and battery because they were both bad, and I checked them both under a load and they are good,
Cleaned all body and engine grounds of corrosion and dirt.
Checked mass airflow sensor and all throttle body connections for corrosion and resistance.
There is another odd thing happening, when I turn my key to the on position the relay controlling my auxiliary fan switches on and off which leads me to believe it is an electrical problem or possibly a PCM problem witch is related to the no idol problem.
Meanwhile I'm trying to not disconnect my battery because I have been running a 10 day inspection for the past 2 months and every time I disconnect it I have to drive to rid my system of the not readys
#3
Herp Derp Jerp
Join Date: Nov 2011
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Fuel filter is a basic sock. It lives in the tank and is non-serviceable.
Next time it dies jump out and get the battery voltage with a multimeter. What shape are the cables in?
Next time it dies jump out and get the battery voltage with a multimeter. What shape are the cables in?
#4
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Model: Cherokee
#6
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Year: 1993
Model: Cherokee
Engine: I6
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