What's the sensor on top of the clutch housing called?

xj92

NAXJA Forum User

Location

Junction City, KS

• Feb 8, 2005

• #1

What's the sensor on the top of the bellhousing called? Somebody told me it was a crank position sensor, the FSM diagram seemed to call it a magnetic speed sensor, so I'm not sure. Are these synonymous? Anyways, if you're looking from the rear of the vehicle it sits at about the 10:30 position and has 2 bolts that hold it in. It has a magnet in the end that positions over the flywheel I believe. I accidentally ripped the wires on it while putting the tranny back in. TIA.

 

old_man

NAXJA Forum User

Location

Loveland, Colorado

• Feb 8, 2005

• #2

That is indeed the crankshaft position sensor CPS. Without it, the engine will not run.

 

xj92

NAXJA Forum User

Location

Junction City, KS

• Feb 8, 2005

• #3

Thanks. Do those go bad as other sensors do, or is a junkyard model as good as a new one generally?

 

X

XJXJ

NAXJA Forum User

Location

SW_USA

• Feb 8, 2005

• #4

xj92 said:

Thanks. Do those go bad as other sensors do, or is a junkyard model as good as a new one generally?

Click to expand...

It's basically a coil of wire inside. As long as the enclosure/casing is intact and undamaged so that moisture hasn't gotten inside and/or the flywheel hasn't touched it, I see no reason to use a new CPS. Mine's 15 years old with +260k miles and haven't had any issues since splicing the connector out of the picture.

 

Yucca-Man

NAXJA Member # 683

Location

Castle Rock, CO

• Feb 8, 2005

• #5

The CPS doesn't seem to go bad as much as the wiing can, but when it fails it's a mother to replace and often overlooked in the diagnostic process. Often, simply unplugging the CPS from the harness can clean the contacts enough to allow function but it's a crapshoot if you are going to use a junkyard one, as I recall they aren't terribly expensive

 

xj92

NAXJA Forum User

Location

Junction City, KS

• Feb 8, 2005

• #6

$58 at AutoZone and $25 at the junkyard. I have a junkyard one on the way. I'm not troubleshooting a problem that I think might be the CPS; I accidentally ripped the wire right where it enters the CPS while putting the transmission back in.

 

old_man

NAXJA Forum User

Location

Loveland, Colorado

• Feb 8, 2005

• #7

The biggest cost from a junk yard is the labor to pull it. Do you have a pull-n-save type yard local? I paid somewhere around $2 for mine. I always keep a spare under the back seat. That way I can be guaranteed that the sensor will never fail :laugh3:

 

xj92

NAXJA Forum User

Location

Junction City, KS

• Feb 8, 2005

• #8

I know of one yard to pull stuff from but don't know if they have Jeeps and don't have time for it . The joys of working under time constraints.