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New VP44 No Start! Codes P0382 , P1689

Posted

Hello Guys, 

New to the forum. Recently bought a cab swapped 2001 24v 5.9 6 speed with a 15x VP pump. I bought the truck not running and dont really know alot about the mods that have been done to it. It does have an edge tuner and a dual turbo installed as well. 

 

I have replaced the VP44 and still have a no start. I have bled the return line banjo and 1, 3 and 4, to the point of flowing good. I have 20psi coming off the fass lift pump dropping to 10psi while cranking. I do have power and ground at the vp plug. I have also tested continuity and grounds from ECM and PCM. 

 

Replacing the VP44 did change the sound while cranking. Before it was just cranking.  Now it seems like it is trying. Looking to be pointed in the right direction. Thanks

 

 

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1 hour ago, Great work! said:

That #8 is not making sense I don't have my diagrams with me, but if that black wire is the shield for the twisted pair CAN bus the shield is only connected at one end of the bus not both ends. I can't remember which end.

Here are the instructions for #8

 

8. Ensure ignition is off and FPCM harness connector and ECM harness connector are still disconnected. Using DVOM, measure resistance between ground and terminal No. 1 (Black wire) on FPCM harness connector. If resistance is 5 ohms or greater, replace and program ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. If resistance is less than 5 ohms, repair short to ground in Black wire between FPCM and ECM.

 

I am getting an open loop. So that is greater than 5ohms. Please correct me if I am wrong or there is something else I need to check. 

Ok I  get it now. If it is grounded that needs fixed. If it's open that means the wiring is okay ie not rubbed through somewhere.  So they just assume the ECM is bad by a process of elimination.  Beware you could dump some cash and still not be fixed.

  • Author
1 hour ago, Great work! said:

Ok I  get it now. If it is grounded that needs fixed. If it's open that means the wiring is okay ie not rubbed through somewhere.  So they just assume the ECM is bad by a process of elimination.  Beware you could dump some cash and still not be fixed.

OK.  That is what I thought too. Just wanted to make sure I am on the right track. 

 

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Welcome To Mopar1973Man.Com LLC

We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.