ECM failure

[Mopar1973Man]

Shoot the WIF plug with brake clean. Then bag the end and zip tie. Any moisture or oil will cause the light to come on. Typically I always leave the stock filter in place and get the big line kit from @dieselautopower. This way you don't have this issue, manifold coolant heat will warm the fuel up.

[Mace]

29 minutes ago, Mopar1973Man said:

Shoot the WIF plug with brake clean. Then bag the end and zip tie. Any moisture or oil will cause the light to come on. Typically I always leave the stock filter in place and get the big line kit from @dieselautopower. This way you don't have this issue, manifold coolant heat will warm the fuel up.

Currently I have a wif sensor in the airdog water separator. Removed the drain and put the sensor in. I ran a jumper harness from that to the engine harness plug.

 

Like I mentioned I unplugged it at the harness side and it’s still stays on. I’m not sure if this is a problem from ACS.

 

I did order a new apps through my work (Inland Kenworth).

 

Williams Control 131973. I should have it by Tuesday. Hopefully it solves my P0122 issue, I will check the wiring harness I made when I relocated in on Monday to confirm is not melted or something. 
 

 

Edited February 22 by Mace

[Mace]

Update:

 

My new APPS won’t be here until tomorrow due to a shipping error.

 

I wasn’t able to make the WIF work. The light does go out if it’s unplugged so I found a connector cap for it to keep it out of the elements much like I did for the heater connector. I tried plugging in multiple types of wif sensors and the light kept coming on, checked the 5 VDC reference (pin B) & ground (all good). I can live without it.

 

So far ACS’s work appears tier 1.

 

I’m running 1/2” line from the pump to the VP. 
 

I’m excited for tomorrow as I hope this truck finally comes back to life. Been well over a month now.

Edited Wednesday at 06:25 AM by Mace

[Tractorman]

 

- John

[Mace]

Wanted to show something here. Here’s the new APPS, number on it is 133284, same as the Timbo. Even though I ordered a 131973 this is what comes now.

 

You can buy these at any truck dealership.

 

Here’s a pic of my relocation bracket.

 

 

[Mopar1973Man]

Gotta ask where did you get the pedal assembly? Also would you be willing to write an article on how you did this?

[Mace]

3 hours ago, Mopar1973Man said:

Gotta ask where did you get the pedal assembly? Also would you be willing to write an article on how you did this?

I will one day when I get this truck finally sorted. The pedal assembly is for an International truck. Part # 699-5101. Rockauto carries them.

 

So a new apps didn’t change things. I eventually found a troubleshooting page from CF Mike wrote. On a scanner the TPS % doesn’t change when I rev it up.

 

I do not have 5 VDC at pin 5 on the apps connector, I did a continuity test between it and pin 31 on the ecm 50 pin connector and it showed 0 ohms and then I load tested it with a halogen bulb and it lit up fine.

 

I figured the ecm was at fault. I removed it to inspect and found I had bent pin 31 over when I initially installed it.

 

I tried to straighten it but it broke half way off. I put the stub end in the female connector terminal and reinstalled the 50 pin and it makes contact. The fault went inactive & cleared but it’s not “good” enough. 
 

Test drive was successful and its runs great.
 

I will have to replace my ecm or get it fixed but I need another one ready to go, I can’t afford this month long saga  again.

Edited Wednesday at 10:33 PM by Mace

[Mace]

8 hours ago, Tractorman said:

 

- John

Big thanks to you for getting those computers back to me. 
 

Also, I messaged Mike on here this morning and he was a phone call away in no time helping me source this issue! That’s a community

 

This is why I really enjoy this forum.
 

In the beginning we had Dave Fritz/Dodgeram.org, now we have TDR (to some extent). Finally we have this place where all the mysteries have been solved.

 

Don’t forget Mike as we discussed: You may perish of cancer but the forum lives forever, so you live forever!

 

 

Edited Thursday at 12:59 AM by Mace

[Mopar1973Man]

20 minutes ago, Mace said:

 

Don’t forget Mike as we discussed: You may perish of cancer but the forum lives forever, so you live forever!

 

Thank you for the kind words. Personally I'm looking for people that are willing to write articles about repairs and information on repairing these trucks. Im going to move forward into 3rd Gen to put Thor at the top of the focus. I need to expand knowledge into newer generations. A lot of info is trapped in my head and needs to get put into HTML5 code for all to see and learn from.

 

Thanks for the comment.