Bwebb2119

Doing that now. I really appreciate the help guys. Ok, Well ECM connector unplugged, Pin #11 is ECM Sensor ground, Ohm tested while unplugged and all sensor connectors connected to sensors, 0.0 Ohms and no stray voltage with key on, When it is plugged in I still get 7.8v on the grounds. So my wires are ok, going to have to have this computer guy UPS it back to him to verify it isn't his ECM giving me a problem; All I can hope is that is the problem

It is supposed to be a new unit after he had the original one 3 different times, I am waiting for him to reply to my email and see if this is a refurbished unit or new. He said when he sent this one that it was to be a new one.

So I unplug it from the ECM and then key on and check the ground wire on the sensors is what your saying?

Well hello all, I don't know where to even start..... So this is a customer of ours and it was originally brought to us for no power. 1999 2500 5.9 stock. So.... Originally the truck only had throttle to 1,400 RPMS, Code was 1689, After serious going through, I diaged the ECM to be no good, Also the VP44 was bad too, Replaced VP44 and sent ECM to Auto computer performance to Andrew to repair, He was told the 1689 code and he also asked about the infamous wait to start light problem, Yes that was there too. He sent it back to me and the wait to start was repaired but still had 1689 and only 1,400 rpm. Sent it south again and he said he was pretty sure it was fixed this time, Again back into the truck and still the same code and 1 set rpm no matter where the accelerator pedal was pushed. So he sent ,e a primer gray ECM, This one now repaired the 1689, Now the truck was running properly. After a few test drives there were now PCM codes like a Xmas tree, Ungodly amount of hours in this truck and replaced the PCM (Ordered form my Dodge parts guy) Had my local PCM guy program the new PCM to this truck, All is good extensive test drives and delivered truck to customer, He puts 30 miles on it and goes into limp mode with no power, Back to our shop and I scan And find P0606; P0238; P0123; P0118; P0113; P0121. Cleared codes and 0606 stays away, Check harness again and again, Can not find any bad wires or connections, Did find the oil pressure sensor was bad, replaced and ok now, Test drive and come back and now I can NOT get rid of the P1286; P0388; P1475; They clear and come right back after some idle time, Then as I amd trying to check over I now have a P1693 which will not leave. And I also got the P0606 again but it stays off for quite a few key cycles, I am seriously pulling my hair out and i believe I may have got a poorly rebuilt ECM or something. Also in another thread I mentioned to the boys that the Black With Blue tracer wire which is the ECM sensor ground has 7.8 volts with the key on. Unplugged each sensor 1 at a time until all unplugged and it drops to 6.0 volts. Someone please have some insight for me PLEASE. Thanks in advance B Webb!!!! And also thanks for having me on this forum!!!!

Checked with voltmeter and have 7.8 volts with key on at each sensor connected to that ground circuit. Disconnected each one at a time and voltage dropped to 6 volts. reconnected all sensors, Local ECM repair guy said to add jumper wire to the ecm ground directly to battery ground, then it dropped to 5 volts with all sensors connected, Started engine and while running voltage drops to 1.7, ANYONE know what may be going on with this thing??? I am pulling my hair out, It was struck by lightning by the way, Replaced ECM and PCM and have Cleaned and checked all grounds. GOING crazy here. LOL.. Thanks guys. '99 2500 5.9

Thank you @dripley, Hopefully someone logs on and sees this, As for now I will remove the loom and inspect the ground connections, You said yours was no good when you checked back then correct???

Hey guys, New to this site and thank you for all the info, ? is the ecm ground I have found is black with blue tracer, My problem is getting 7.8 volts with ignition on, Before i cut into harness to try and locate the solder joint with all 8 wires I was wondering why am I getting the voltage. It is grounded with key off. I am getting the codes for voltage too high on all the sensors.