Jump to content

Recommended Posts

Little background to leading up to this past week.  Had the P0237 and P0112 codes with the original ECM.  Replaced the MAP Sensor and IAT sensor first.  Cleaned the grounds. Still had issues. Hooked it to a snap on code reader and could watch the voltage drop out to the sensors. Ordered an ECM from the number one place on the list here. Installed it. Great for 150 miles. Then got a buck and lost all throttle response.  Then it came back, bucked again and then threw the P1689 code for no communication between the ECM and IP.  While at the shop they went through everything using insight.  Pump was dead. New pump installed. Same issue. No communication.  Wiring checks out. But they are saying that the ECM could have been repaired inproperly and took out the electronics on the VP

Share this post


Link to post
Share on other sites

What needs to happen is do the BlueChiop hot wire test. This will power up the VP44 as a stand-alone module. The truck should start and idle without a ECM

Share this post


Link to post
Share on other sites

They did that.  Old VP wouldn’t run. New one runs like a new one should bypassing the ECM.  I can’t get a call back from the ECM rebuilder to address the issue.  They are pushing the point that the rebuilt ECM took out the VP.  I know anything is possible.  But didn’t know if anyone else might have had the sameness issue 

Share this post


Link to post
Share on other sites

All I can say is contact the ECM rebuilder and let them know the VP44 has been damaged by there rebuilt ECM. You'll need to get a replacement VP44 and ECM re-tested. 

Share this post


Link to post
Share on other sites

I’m hoping they get back to me. The VP is replaced already but they are waiting on an ECM from the corporate office so they don’t damage the new VP.  I’d hate to have to go after the builder legally but sometimes you have to go that route

Share this post


Link to post
Share on other sites
Posted (edited)

I really doubt hte ecm took out the vp.  Pssobile, but unlikely. 

Edited by Me78569

Share this post


Link to post
Share on other sites

Nick I agree with you, but by what process can an ECM take out the VP44. I say unlikely almost impossible

Share this post


Link to post
Share on other sites

I have never heard of that happening myself. I guess I would have the same question as to how the ECM could take out the VP.  I guess anything is possible though. Proving might be a different animal. 

Share this post


Link to post
Share on other sites

Bap, while you are making an investment into this truck for future I want to advise you to install a new TIMBO apps. Im not saying factory apps is causing the issue, but more likely than an ECM that your shop is saying. Especially since the Timbo is so much more reliable and half the cost of the factory APPS, it goes hand in hand with a new injection pump.

  • Like 2

Share this post


Link to post
Share on other sites
10 hours ago, JAG1 said:

Bap, while you are making an investment into this truck for future I want to advise you

 

There is so much stuff we could open up with that comment snip. Like the ground wire mod. Timbo's Apps. So many other modifications that should be done to these trucks to make them bulletproof and last forever.

  • Like 2

Share this post


Link to post
Share on other sites
Posted (edited)
1 hour ago, Mopar1973Man said:

 

There is so much stuff we could open up with that comment snip. Like the ground wire mod. Timbo's Apps. So many other modifications that should be done to these trucks to make them bulletproof and last forever.

Interesting to see what mods are most bullet proof for 2nd gens.  Maybe different post?

Edited by 015point9

Share this post


Link to post
Share on other sites
Posted (edited)

I mentioned the Timbo because anything needed future wise anyway, helps narrow down what might be wrong. If a shop told me the ECM may have taken out the VP.... I might be thinking about taking my truck somewhere else at that point.

Edited by JAG1

Share this post


Link to post
Share on other sites

I understand the possibilities are low. I’ve been an electrician for almost 20 yrs and I’ve seen electricity do some weird things. But I also don’t know how they can run a full ecm test without a truck. When I first put the ecm in the truck it threw 9 codes.  1689, 0521, 0230, 0380, 0382, 0118, 0113, 0122, and 1693.  That right there seems to point that all those codes were not part of the final test.  When you send an ecm back for a core, you are required to fill out a form stating all the known issues of the ecm.  The shop that it is at is one of the best in the area. They are approved by bosche to remanufacture VP pumps.  I sat there Friday and watched the truck run fine with the ecm out of the equation.  

Share this post


Link to post
Share on other sites

VP's are rebuilt and calibrated without the truck.  Would seriously doubt ECM' are done any different. Have you contacted the ECM rebuilder?

Share this post


Link to post
Share on other sites

ECM rebuilder isn’t returning any of my calls or replying to any of the emails.  

Share this post


Link to post
Share on other sites
Posted (edited)
3 hours ago, JAG1 said:

............. If a shop told me the ECM may have taken out the VP.... I might be thinking about taking my truck somewhere else at that point.

 

Agreed

 

 

.

1 hour ago, bap371981 said:

ECM rebuilder isn’t returning any of my calls or replying to any of the emails.  

 

 Who is the rebuilder?

 

 

.

Edited by GSP7

Share this post


Link to post
Share on other sites

Bap, start checking the ECM harness connection and the VP connection. Look at all the pins/ connection points closely, that all look the same nothing distorted. Make sure clicked all the way in.

 

Check for clean electrical connections on battery posts, everywhere you can.  

Share this post


Link to post
Share on other sites

I went through all that before I had it towed to the shop.  The ecm is definitely the issue.  We even went as far as checking harness with a meggar.  That would definitely tell if there was any issue with the wires.  All the pins looked like new. You could see marks on the pins from the harness. My old ecm communicates with the new VP just has issues because of the 0112 and 0237 but that’s the only issues with that.  I told them it will run if you put the tune in it from the smarty but that’s against the rules at the shop.  They have a couple of ecms at the corporate office that are going to be there Monday.  So hopefully I have my truck back

  • Like 1

Share this post


Link to post
Share on other sites

Be interested in where this goes. I struggled with the 237 for a few months and it was in the wiring a not the sensor, VP or the ECM. Pretty sure it has to do with the ground splice in the engine wiring harness near the ECM, best my uneducated self can tell.

  • Like 1

Share this post


Link to post
Share on other sites

On the bright side of all this, the remaned ecm doesn’t have the p0112 and p0237...

Share this post


Link to post
Share on other sites

So the truck has a new VP now. New ecm still won’t communicate with the pump.  Truck runs good with the old ecm just throws the p0112.  Strange thing when driving it home. Old vp I saw 30 at most 32psi boost.  New VP it jumps to 35psi without any hesitation.  Now I’m starting to wonder if a short in VP took out the ecm.  Maybe it was just coincidence that it went after installing the new ecm.  I don’t really have a straight answer on the whole situation.  I know the harness’s is good. No shorts.  Alternator checks out.  0.013 on the ac leak test. Guess I’ll have to see what pans out in the whole situation 

Share this post


Link to post
Share on other sites

Here's a fun little update.  Sent the ecm back to the rebuilder.  Said it had a short on the IP circuit.  Came back with a bunch of paperwork stating it was tested. And came back with a bunch of stickers stating my truck has a short.  I have $700 in labor charges and a write-up on the bill that there is nothing wrong with the harness.  

 

Took it to cummins this afternoon to have the ecm installed incase I was missing a step in the process and to rule out any variables.  Ecm threw the same group of codes as the first time I installed it. They cleared them started backing out of the garage and low and behold. P1689 came up again.  His remanned ECM has issues. He is denying the fact and swears my truck shorted it out. But if that was the case, why does my old ecm not have the same communication issue?

Share this post


Link to post
Share on other sites
1 hour ago, bap371981 said:

They cleared them started backing out of the garage and low and behold. P1689 came up again.  His remanned ECM has issues. He is denying the fact and swears my truck shorted it out. But if that was the case, why does my old ecm not have the same communication issue?

 

P1689 is communication code. Basically anything to screw up communication between VP44 and the ECM

 

Possible Causes

  • Wiring & Connectors
  • Fuel Injection Pump Relay Output Circuit Open
  • Ground Circuit Open Or High Resistance
  • Datalink (+) Circuit Open
  • Datalink (+) Circuit Shorted To Ground
  • Datalink (-) Open
  • Datalink (-) Shorted To Ground
  • ECM

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



×