12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

i need a bigger hammer

Thread Tools
 
Search this Thread
 
Old Sep 6, 2010 | 06:27 PM
  #1  
cummins95's Avatar
Thread Starter
|
Diesel Wrench
Joined: Apr 2009
Posts: 772
Likes: 48
From: Sullivan County, PA
Default i need a bigger hammer

im havin electrical problems. my tach n speedometer are jumpin all around, most of my warnin lights are flashing randomly n my alternator isn't working. i was thinkin maybe the crank position sensor but im no electrical expert. what do u guys think?
 
Reply
Old Sep 6, 2010 | 07:14 PM
  #2  
joey's Avatar
Diesel Enthusiast
Joined: Sep 2009
Posts: 310
Likes: 2
From: rockport texas
Default

Mabe a loose ground
 
Reply
Old Sep 6, 2010 | 07:22 PM
  #3  
mishkaya's Avatar
Diesel Bomber
Joined: Oct 2008
Posts: 2,618
Likes: 108
From: Iowa
Default

I would also vouch for a bad/corroded ground somewhere...
 
Reply
Old Sep 6, 2010 | 07:29 PM
  #4  
cummins95's Avatar
Thread Starter
|
Diesel Wrench
Joined: Apr 2009
Posts: 772
Likes: 48
From: Sullivan County, PA
Default

alright i'll check it out tomorrow after work. im wonderin if i didn't yank somethin loose during my trans swap cuz the gauges have been screwin up every once in a while since then
 
Reply
Old Sep 6, 2010 | 08:59 PM
  #5  
lodal cummins's Avatar
Diesel Enthusiast
Joined: Aug 2009
Posts: 462
Likes: 18
From: portland oregon
Default

after i did my KDP i had the same issue. did not gap the crank sensor right.
 
Reply
Old Sep 8, 2010 | 06:47 PM
  #6  
daveO's Avatar
Diesel Bomber
Joined: May 2009
Posts: 1,030
Likes: 171
From: Pottstown, PA
Default

I've also heard of similar issues due to a bad CPS.
 
Reply
Old Sep 8, 2010 | 06:49 PM
  #7  
12vcummins96's Avatar
Administrator

Joined: Aug 2009
Posts: 5,765
Likes: 340
From: Pearland Tx
Default

sounds like a bad cps
 
Reply
Old Sep 8, 2010 | 06:51 PM
  #8  
cummins95's Avatar
Thread Starter
|
Diesel Wrench
Joined: Apr 2009
Posts: 772
Likes: 48
From: Sullivan County, PA
Default

thats what im thinkin. i've been workin alot lately n havent really had a chance to mess with it yet
 
Reply
Old Sep 12, 2010 | 06:50 PM
  #9  
cummins95's Avatar
Thread Starter
|
Diesel Wrench
Joined: Apr 2009
Posts: 772
Likes: 48
From: Sullivan County, PA
Default

ok so far i changed the CPS with the one off my other cummins, no change. called one of my buddies and borrowed the PCM from his 94, no change. i unplugged the cps and my tach is still bouncin. i thought the cps controlled the tach???? what the hell is goin on here? i have no WTS light, the alternator isn't charging, my tach n speedo are bouncin. i really hate electricity. im really pissed off and im about at my wits end.

---AutoMerged DoublePost---

i've now gone thru just about everything i can change and i've gotten nowhere, i've checked grounds, i just dont know what to do any more. can someone please help me

---AutoMerged DoublePost---

still fightin. i changed the ASD relay, n there are 2 relays on the the firewall about dead center of the truck. not sure what they do but i changed them anyway. next thing is the alternator.

a little background, the first time i noticed the gauges jumpin was about a week after i got the 5 speed in, i took my buddy for a ride, shifted into 2nd n got on it a little n it wheel hopped n the tach n speedo started bouncin for about a minute, then went back to normal.

---AutoMerged DoublePost---

should i even bother changin the alternator? i unhooked it today n it didn't change anything
 

Last edited by cummins95; Sep 12, 2010 at 06:50 PM. Reason: Automerged Doublepost
Reply
Old Sep 13, 2010 | 05:07 AM
  #10  
wes-cummins's Avatar
Diesel Wrench
Joined: Dec 2009
Posts: 576
Likes: 10
From: wisconsin
Default

stupid chrysler electrics

take it to a shop and get the altenator tested mabey its not putting out enough voltage,
did you check for bad grounds?
 
Reply



All times are GMT -5. The time now is 09:35 AM.