Gonna push it off a cliff
#1
Member
Thread Starter
Join Date: Nov 2009
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
Gonna push it off a cliff
What does the crank position sensor use to pick up it's signal? I know the flywheel, but are there magnets in the flywheel?
#2
CF Veteran
The sensitive magnet inside the CPS picks up the flywheel teeth as they pass by. Being metal, it is inherently paramagnetic, and so the sensor can detect the presence or absence of a notch or "tooth" on the circumference of the flywheel.
Keep in mind that it isn't that sensitive and the space between the sensor and teeth cannot be too great.
Keep in mind that it isn't that sensitive and the space between the sensor and teeth cannot be too great.
#4
CF Veteran
The sensor is not adjustable, and should reliably mount in the same position. It's mounting spot is pretty precise... The only "adjustment" you could do is pick up the CPS that has been factory adjusted for high altitude. Do you suspect your CPS isn't working?
#5
Seasoned Member
Join Date: Nov 2010
Location: Michigan
Posts: 475
Likes: 0
Received 2 Likes
on
1 Post
Year: 1998
Model: Cherokee
Engine: 4.0
Here is a picture of a Chrysler Flexplate. It has that ring attached to it with those square holes thru it. When it spins the CPS picks up where those holes and communicates it to the Computer and Cam Sensor. Thats my understanding of it at least.
#6
CF Veteran
Flexplate! Not flywheel. Thank you. And that's exactly how it works. You can't really see it in that pic but I'm pretty sure at some point there's a bigger notch to let the sensor know when it has made a full revolution.
#7
Member
Thread Starter
Join Date: Nov 2009
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
I have several threads on here about this jeep. Got it running on Monday, went to go to work Tuesday morning and it won't start again. I just pushed in the garage to warm up overnight and am going to jump on it tomorrow. It will attempt to start sometimes, but will not stay running. It's getting plenty of fuel. Replaced all the tune up stuff, plus the timing chain. I swapped out the kps with another used one,so I'm pretty sure it is not that. I'm wondering if possibly the cam sensor under the dist cap.
Trending Topics
#10
Seasoned Member
Join Date: Nov 2010
Location: Michigan
Posts: 475
Likes: 0
Received 2 Likes
on
1 Post
Year: 1998
Model: Cherokee
Engine: 4.0
I misunderstood what you typed sorry. It's been a long day and for some reason I actually thought you were talking about reading all the little teeth along the outside of it.
Thread
Thread Starter
Forum
Replies
Last Post
cpnwrench
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
14
05-05-2024 12:21 PM
DieselDaze
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
09-30-2015 06:42 PM
64dodge
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
3
09-30-2015 05:50 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)