Cold start issue
03-15-2019, 05:44 PM
#16
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Join Date: Feb 2019
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Model: Cherokee (XJ)
Next step?
So far have ruled out:
Not the IAC
Not the fuel pump relay
Not the ASD relay
Symptoms:
Starts then immediately shuts off
Sometimes will start and run fine after 3-4 key turns
Sometimes need to keep foot on the gas until it’s past the first tick on the temp gauge, then runs fine
Once warm it runs reliably
*One time occurrence started warm, ran very rough, sputtered, and pressing the gas pedal had no reaction or any increase in idle, stayed running and problem corrected itself after about 1 minute.
I think my my next attempt will be replacing the Throttle Position Sensor as that looks from YouTube like something I can handle. After that... time to find a shop that has the skill and equipment to track down the issue. My technical skill and knowledge are limited.
Not the IAC
Not the fuel pump relay
Not the ASD relay
Symptoms:
Starts then immediately shuts off
Sometimes will start and run fine after 3-4 key turns
Sometimes need to keep foot on the gas until it’s past the first tick on the temp gauge, then runs fine
Once warm it runs reliably
*One time occurrence started warm, ran very rough, sputtered, and pressing the gas pedal had no reaction or any increase in idle, stayed running and problem corrected itself after about 1 minute.
I think my my next attempt will be replacing the Throttle Position Sensor as that looks from YouTube like something I can handle. After that... time to find a shop that has the skill and equipment to track down the issue. My technical skill and knowledge are limited.
03-15-2019, 06:19 PM
#17
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Join Date: Mar 2016
Location: Oklahoma
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Year: 1992
Model: Cherokee
Engine: 4.0L L6 PowerTech (stock)
I scanned the previous posting. What is the fuel pressure before training the key to the run position, while cranking, and after cranking +10 seconds when it doesn't start?
If you are sitting at the correct pressures, then we can rule some things out. You can "rent" a fuel pressure tester for free from sorts stores like O'Rielly's.
If you are sitting at the correct pressures, then we can rule some things out. You can "rent" a fuel pressure tester for free from sorts stores like O'Rielly's.
11-01-2019, 07:31 AM
#18
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Location: Missouri
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Year: 1999
Model: Cherokee (XJ)
Engine: 4.0
Not sure if the OP got his issue resolved. I had the issue and what worked for me (maybe a complete coincidence and it fixed itself????) was locking and unlocking the rear tailgate a few times with a key and unlocking and unlocking all the locks with the switch on the passenger door. Supposedly if it gets cold enough the voltage in the battery for a moment confusing the security system. The locking and unlocking resets the security system. It worked for me. Sounded crazy to me but it SEEMS to have worked.
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