i just got a 99 dodge cummins it has about 175,000 miles on it . when i got it i was told that it had some problems but i got it right . so any way here is what i have . it will not charge i have pulled the alt. off and had it test at the local parts store . i have worked on a few of these trucks but mostly the 12 valves . i know on them you had a crank sensor and the pcm to control charging . know as i am typing this i just got to thinking the other problem might be causing the charging problem . this is what i know about the 2nd problem it has a crank shaft sensor code , when you start it misses for awhile then runs fine , the tach jumps all over than quits sets on 0 , thats when it smoths out . i was also told that it eats crank sensors somthing about magnets coming loose on the crank . i would like any feedback on this .

 

I can only tell you when my Crank Pos Sensor whent out, it did those things you described with the tach. My gauges would move to the right and then to the left as well.

The only other sensor I lost was the Map Sensor. It made the truck stumble hard.

I have had know charging issues so far at 152,000.

Dave

 

what about what i was told about magnets or something coming off the crank its self ? please help . i will take anybodys advice thanks

 

Sounds like a ford guy told you that. There are no magnets on the crank. I think the charging system is controlled by the PCM and the camshaft position sensor. The CPS is by the VP (according to my book). There is also a 120 Amp fuse in the Power Distribution Center under the hood that might be the problem.
Tom

 

i have already checked the fuse . i have done ever thing i know to do . thats why i am on here begging for help . thanks

 

What does the camshaft sensor have to do with charging Does the pcm turn on the regulator when it senses engine revs? The magnet is part of the sensor and may be struck if something is misaligned.

 

Yup.


phox

 

There is a two piece tone wheel screwed onto the crank throw, and yes, they can come loose. Remove the crank sensor and pry on tone wheel through the hole and see if there is any movement (you'll have to use a mirror to observe). Rotate it a few times and check. You'll also want to look for any missing teeth. I had a reman engine come equipped with a missing tooth. That will cause some fits.....and you don't want to know the he77 of having to replace that tone wheel!

 

Here is some additional info on the CSPS.

http://www.geocities.com/palmerlives...aftSensor.html

Here is another real good info source.

http://www.dodgeram.org/ram.html

Follow the diesel links. Did not see anything about the charging system. It may still be there just did not see it. You may be able to send a e-mail to Fritz with a question.


Dave

 

thanks for all the help i would say the tone ring is screwed up . i will try pull the starter and check the tone ring today . jbody do you think with pcm not really knowing the rpm it is not turning the alt. on ? thanks again .

 

just checked tone ring sure enough it has some play . that does it call to fix this how many hours am i looking at . can i get the pan out and fix it in the truck or does the motor need to come out . please help if anyone has done this . thanks