Check Engine Light Truck Running Rough

Magnum PD · Dec 22, 2016

Bruno2 said:
Also, when you are saying "computer" are you talking about the ECM or IDM?

Probably the PCM

Bruno2 · Dec 22, 2016

The female plug looks like it is broken on the EOT sensor (I think it is the one on the back of the HPOP reservoir?) I am looking into getting another one just in case that was why the EOT codes were coming up at the beginning. I found a couple on Rockauto that look similar to it. Part # HP4400 or possible S612 for the pigtail plug:

More Information for STANDARD MOTOR PRODUCTS HP4400

More Information for STANDARD MOTOR PRODUCTS S612

Bruno2 · Dec 22, 2016

Magnum PD said:
Probably the PCM

I also, would like to say thank you for helping me with this Magnum PD.

Magnum PD · Dec 22, 2016

I had the same problem but I had a bad lpop

If it isn't getting EOT it'll default to like 175 degrees or something.

Bruno2 · Dec 22, 2016

Magnum PD said:
I had the same problem but I had a bad lpop

If it isn't getting EOT it'll default to like 175 degrees or something.

The LPOP only has around 70K on it and I bought a high dollar Melling when my buddy did the overhaul.

The issue turned out to be the IPR. It was bad. I just swapped that one in when I was having a different issue which turned out to be the P/U tube in the rear tank. I took that IPR apart, cleaned it up, and swapped it in when I was diagnosing it. I didn't change the O rings. I just took it apart to clean it.

So I was ignoring it because it was freshly cleaned within the last 8 or nine months. Turns out it went bad. I bought an O ring kit for my spare here locally. The truck is running like a sewing machine now.

Thanks again for your help!