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Seasoned Member
Joined: Jan 2011
Posts: 295
Likes: 0
From: Roscoe, IL
Year: 2000
Model: Cherokee
Engine: 4.0L 242 Power Tech I6
Alright guys, I'm looking for opinions on what else could be wrong. I replaced my cam position sensor and it started up after a few tries.. Ran rough at first, but smoothed out fine. It ran fine for a few minutes, then just turned off, basically as if I'd turned the key.
Crank position sensor was replaced last winter.
It's still throwing P0340.
What else could be going on?
Crank position sensor was replaced last winter.
It's still throwing P0340.
What else could be going on?
Junior Member
Joined: Dec 2014
Posts: 47
Likes: 0
From: Jackson, MI
Year: 1998
Model: Cherokee
Engine: 4.0 I6
Alright guys, I'm looking for opinions on what else could be wrong. I replaced my cam position sensor and it started up after a few tries.. Ran rough at first, but smoothed out fine. It ran fine for a few minutes, then just turned off, basically as if I'd turned the key. Crank position sensor was replaced last winter. It's still throwing P0340. What else could be going on?
Have a multimeter? Test for your five volts @ tps cps and cam shaft.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Heep is screeching from the engine bay when I accelerate and only when I headlights are on. Battery gauge shows a drop when the screeching happens. Comes back up when I turn the headlights off. What should I look to? Alternator? Just replaced the belt
Seasoned Member
Joined: Jan 2011
Posts: 295
Likes: 0
From: Roscoe, IL
Year: 2000
Model: Cherokee
Engine: 4.0L 242 Power Tech I6
It could very well be the pulley on the alternator. Have you tried spraying a little lubricant behind the pulley. That will help you determine where the screeching is coming from.
Also, depending on where you live, the cooler temps can cause belts to squeak. It doesn't absolutely mean something is wrong.
Last edited by zimbobwye; Jan 17, 2015 at 06:49 PM.
It only makes the noise when you're accelerating AND the lights are on?
It could very well be the pulley on the alternator. Have you tried spraying a little lubricant behind the pulley. That will help you determine where the screeching is coming from.
Also, depending on where you live, the cooler temps can cause belts to squeak. It doesn't absolutely mean something is wrong.
It could very well be the pulley on the alternator. Have you tried spraying a little lubricant behind the pulley. That will help you determine where the screeching is coming from.
Also, depending on where you live, the cooler temps can cause belts to squeak. It doesn't absolutely mean something is wrong.
Seasoned Member
Joined: Jan 2011
Posts: 295
Likes: 0
From: Roscoe, IL
Year: 2000
Model: Cherokee
Engine: 4.0L 242 Power Tech I6
The gauge will fluctuate when any new drain is added. But, yeah. It is definitely worth keeping an eye on. If you have a multi meter you can test it. Most auto parts stores will also test it for you at no charge.
Senior Member
Joined: Sep 2014
Posts: 580
Likes: 0
From: Saginaw Mi area
Year: 1994
Model: Cherokee
Engine: 4.0
If the voltage is fluctuating while the screeching is heard, maybe the alternator drive-end bearing is seizing up sometimes...
You could remove the belt & see how the alternator turns by hand...
You could remove the belt & see how the alternator turns by hand...
Seasoned Member
Joined: Dec 2013
Posts: 473
Likes: 0
From: SATX
Year: 1999
Model: Cherokee
Engine: 4.0 I6
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II





