sethreesh

Loren that’s wild. Sorry it keeps happening to you. On a good note the truck it up and running no more surging!! Thanks for all the advice and patience with me as we figured it out.

I paid 1400. They gave me a military discount and a forum discount. They also did the PCM and ECM harness. The work they did was really good. Not one drop of oil or residue. Even smells clean. All the insulation and wrap is new and tight. I was hesitant at first but am very happy.

I shouldn’t laugh but that is humorous

Got my harnesses back. @Auto Computer Specialistdid a bang up jump cleaning them all up. Going to install tomorrow evening or Saturday weather depending. Anything to look out for when I put them back in?

Oh I’m just cleaning up the engine while the loom is out for testing. Like your crank case breather mod I need to do that as that vent has made everything below it absolutely disgusting.

Hey guys while the ECM/PCM/Wiring Harness are at the @Auto Computer Specialist shop I am reviewing the grounds again just to triple check and make sure I have all the major ones. Want to check with you guys to see if I'm missing anything. So far I have cleaned up: Outside The Cab 1. Driver side battery ground to engine just below the power steering pump on the timing case. 2. Driver side battery to frame mount for the front bumper 3. Driver side battery to body on the fender 4. The G100 just behind the driver side head light 5. Additional ground by G100 (two leads going to it; which one is this?) 6. Just aft of the PDC bolted to ABS controller coming out of wiring harness (not sure which one this is to) 7. Passenger side battery to PCM 8. Passenger side battery Engine 9. Passenger side battery to Body 10. Just above starter below ECM 11. W-T mod on timing case Inside The Cab 1. Two sets on driver side kickplate 2. Centerline in dash frame below radio Let me know what I'm missing. Thanks guys.

So tan/black to battery ground? Just making sure I understand. You’re saying the short could be in that signal causing the error. And it’s probably a small break so it’s intermittent

I'm really interested in where the short is at. The tan/black wire from the ECM to ECT is a brand new pinned in wire. All the sensor grounds tested less than .2 ohms each last night from the ECM plug to the sensor. I sat on the kitchen floor with it all laid out and tested each point. This is driving me. Interesting that I am not getting any codes from this. Only way to get a code is to unplug the sensor. The P1693 was stuck in for a while but when I did the W-T mod that went away. But hey at least I'm not paying diesel prices in WA right now....have to find the bright side.

I did that as my very first step of troubleshooting. Put in a ECT from NAPA still had problems. Did a bunch of other troubleshooting. Thought maybe the NAPA one was bad so I pump in one from Cummins still had problems. With it unplug and multimeter on the ECT sensor you can watch resistance change as temp increases.

Well guys here with an update I got the ECM and PCM out along with both harnesses out. It's currently on route to @Auto Computer Specialist. Should be there this Thursday. Let's hope they are able to figure out this rouge electrical problem. Those harnesses get pretty nasty I pulled all the old brittle plastic insulation off cleaned off all the old tape. The splice looked in good condition but I didn't break into it. For those wondering splice S165 sat just below the power steering pump on my truck. While all that stuff is out for the next few weeks any one have suggestions on what I should do to continue making this baby shine? I have a BHAF sitting waiting to be put in when I put everything else back in for the electrical problems.

Haha you’re telling me looks like I’ll pull it off on Sunday and send it out…

I may just make a entire new ground line that goes from the ECM to each associated sensor to eliminate it from being a problem.

Loren do you know exactly where that is in the loom I have the loom opened up from the ECM to where it begins to dip below the power steering pump and I don’t see it

So a little more digging on the s165 the apps ground, ECT ground, oil pressure ground, cam ground all read at 6 ohms, the IAT ground read at 5 ohms and the pin at the ECM (pin 11) was 5 ohms. The ECT is the only on that seems to change the live value on my scan tool. So it looks like I need to go into the loom and see if I need to repair that connection…

Here’s a live view of the ECT and surging. I’m going to dig into the s165 splice and see what I find The shop I left it at couldn’t figure it out and want to say it’s the ECM I can’t imagine after it being looked at twice by ACS that it’s the ECM