Please ID: Coolant Temperature Sensor? pic included
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Newbie
Joined: Jul 2009
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Year: 1991 Laredo
Model: Cherokee
Engine: 4.0 HO from a 92
After I jiggled the injectors it fired up fast, and has since. On the highway, it took a while to crank each time. I just moved it out from the garage to the road and it started fine, but idled at 1500rpm the whole time.
CF Veteran
Joined: Jun 2009
Posts: 5,383
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Year: 1988 limited
Model: Cherokee
Engine: 4.0 litre
Sounds like the CPS going bad and the Idle Stepper Motor went crazy for the frequent starts.
Try to clean the CPS connector contacts, it is near the injector harness at cil #6
Try to clean the CPS connector contacts, it is near the injector harness at cil #6
Thread Starter
Newbie
Joined: Jul 2009
Posts: 15
Likes: 0
Year: 1991 Laredo
Model: Cherokee
Engine: 4.0 HO from a 92
Edited my info from earlier post....already did the CPS, about a month ago...but will clean contacts to be safe.
CF Veteran
Joined: Jun 2009
Posts: 5,383
Likes: 5
Year: 1988 limited
Model: Cherokee
Engine: 4.0 litre
I have read about many others on here having problems with new non oem CPS sensors failing after a week or two.
When it stalls again plug in a tester and measure resistance of the sensor.
Correct values are between 175 and 225 ohms.
When it stalls again plug in a tester and measure resistance of the sensor.
Correct values are between 175 and 225 ohms.
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