hellwig333

I did a few searches and read a million posts, however was unable to find a clear answer. Does anyone have a good diagram or pic, about the exact location of the CMP on a 2000? I understand it to be somewhere near or behind the IP, is that correct? I found some type of sensor wedged up towards the front between gear plate and IP, and there doesnt look like any way to replace other than pulling a bunch of crap off. Any help would be appreciated.

Thanks,

JD

dodgetech77

Thats it under the IP!

blackdiesel

try this

smokindog

#22 in the diagram above is it, but I believe the VP has to come off to get at it.

blackdiesel

dang, thats no good!

hellwig333

Ok, I thought that was it. I was barely able to get my hand to it, much less disconnect and remove it. Looks like I will replace it when I replace the IP next week. Anybody ever have a CMP take a crap? Aint Dodge grand!

jrs_dodge_diesel

I've never had it happen but I know the symptoms.

The CMP directly feeds the ECM. The ECM uses it for several things, one of the function is knowing if the engine is running or not, and providing an output to the tachometer.

The three main symptoms of a dead/dying CMP are:

1 - No tachometer movement (shows 0rpm) with engine running. This can either be all the time or intermittant.
2 - Voltmeter drops to 12 volts (bettery voltage). This is because the ECM thinks the engine is not running and shuts off the alterantor (alterantor output is controlled by the ECM).
3 - A/C compressor clutch will disengage (if the A/C is running). Same thing as the alternator, the ECM also controls the A/C compressor clutch.

hellwig333

Thanks JRS, not my symptoms, but I think I will replace it when I replace the IP, since it is so hard to get to. What could it hurt?

J BODY

Cam sensor can be removed without removing the VP. I've found the angle my Topside creeper gives me makes the job not so bad.

hellwig333

Replaced the IP, and the CMP, and the beast roars! Thanks for all your help fellas!