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While running I measured 5 volts on the boost sensor. I did measure around 2 volts on the IAT and ECT sensors. Truck ran to about 197 degrees and then died after I begin playing with the pedal I also tested the truck with all of the sensors unplugged and I still have the same outcome. The truck...

This harness? https://quadstartuning.com/products/6-5l-engine-wiring-harness

Okay for anyone still following, I replaced the CPS with an AC delco today with no different outcome. Tried with the original computer and nothing. Unplugged the ect sensor and the truck ran for over an hour just fine around 800 rpm. Anything lower it starts running rough and stalls. After it...

I'm going to go ahead and order an AC Delco cps. I did notice today that the truck is smoking while cranking when it doesn't want to start so I guess it is getting fuel which is an improvement.

I believe it's either ac delco or Napa I cannot remember

Parts replaced so far on my 1998 c2500: -Authorized stanadyne dealer reman DS4 pump with gray PMD -AC Delco oil pressure switch -AC Delco ECT sensor (crossover & gauge sensor) -Napa IAT sensor -Crank sensor -Starter -Air filter -Fuel filter -AC Delco lift pump -2 new batteries -Used PCM...

If the truck was a 5-speed with a single thermostat I probably would have been more likely to go the db2 swap route but the thought of having to do with more computers and fabrication rather than it being a direct bolt in kind of steered me away. Not that I'm not capable but this seems to be the...

I realized my two options were to replace or convert. I figured just replacing the DS4 with a good pump would solve my problem. I'm not sure how long I will keep the truck and I assumed it would last as long as I kept it. I didn't really feel like getting any more into a project of swapping over...

Yes it is a new gray pmd. I relocated it to behind the grill. I did realize the extension harness I have did not fit the PMD properly I trimmed the tabs off of the harness extension and it fit. This morning I removed the harness extension and plugged the PMD into the pump directly floating in...

Update: I took the advice you guys gave and purchased a rebuilt DS4 pump from an authorized stanadyne dealer with a stanadyne PMD. I got the truck running although I do not have the scanner to read timing but should have it later this week so I am unsure of what the timing is. I did run the...

Just dumped more water on the pump and it fired back up but it would not continue to run unless I held the throttle above 1000 RPM. It did start unlike other times where it wouldn't even attempt. I guess now I need to decide if I want to stick with the DS4 or swap to a db2.

Somehow I completely missed a large quantity of responses on the forum. I dumped about 4 gallons of water on the pump and I got the truck to start back up. Truck was running and died at 186 degrees. I'm going to attempt to dump water on it again and see if I can get it to start

I checked some grounds and added more grounds today and ran the truck without the PMD extension harness. The truck shut off at 170 degrees. I unplug the ECT sensor and the truck hesitated but started. I ran it for about half an hour got in the truck gave it throttle and it died immediately after...

I purchased a used computer from a salvage yard that I was told came off of a running truck. That truck was a non EGR truck a d I'm assuming no MAF either since my truck doesn't show anything on the scanner for the MAF voltage with this computer. Same problem with both ECMs.

Yes it is consistent at 170° the truck may not shut off on its own every time but you can hear the engine rpm fluctuate from 700 to 670 and back up. The truck starts pretty well cold a d I have been able to get it to start before after stalling by unplugging the ECT sensor but I have to play...

Would a worn head and rotor cause the truck to shut off on its own even while idling?

Unfortunately I do not own a lab scope. I'm working with a power probe, multi meter, and a test light. I have tried installing the pmd without the extension harness and have gotten the same result. I've gone through and cleaned the electrical connectors on the harness with electronic cleaner and...

Truck shut off this morning after warming up although it seemed like it died sooner than normal. Unfortunately I did not have the scanner connected to the truck so I don't know what the actual temperature was per the ECM. The check gauges light came on and then the battery light (Brake light has...

I was just researching a db2 swap... Is the db2 pump 100% mechanical so that if my truck does have an electrical problem that it will not effect it? I've gone over the truck and checked all recommended potential problems and have found nothing that looks out of the ordinary. I found another...