s3construction

After new batteries chasing numerous wires cleaning grounds etc no change in problem. So a friend of mine owns a salvage yard and he had a used ecm we changed it and it runs perfect now. Thanks for the help and point in right direction

From just what Ive played with the truck not having it run much I have had to jump it couple times to get it to start today so Im gonna throw couple fresh batteries on and clean cables and grounds real good start there. I will be able to check fuel pressure later in week when I get some more time to work on it. Thanks guys

I didnt THINK I misunderstood.?. After truck sets for awhile like overnight it takes awhile for the wait to start light to come on. Seems like after the initial start and run for a few mins there is no delay in the wait to start like to come on with key. I understand the clunk now that you told me and I get why the guage takes a min to get up to 14 as well now that you told me that. We was thinkin ecm or apps from the start kinda hoped the apps may just need calibration. I had no idea of the finicky ways these trucks seem to have after reading all the forum stuff here and at the cummins forum I thought they were tough as nails half million mile change the oil and filters motors, and maybe they are after a few upgrades like the Timbo Apps and fuel filter system and alternator etc

So new alt and ecm? Also hear a thump when turning key on guessing that may be in the hvac system? Also it does take alternator along time to get up to 14 on the charging system when you start truck via the in dash guage

Unhooked alternator wires and took out fuse no difference. I did notice when I turned key on this morning very first thing there was a delay in the wait to start but it seems like its only after trucks been sitting.

No wonder it wouldnt work then lol thanks for the info!

No codes I tried the key on off thing. I will try the alternator unplug in the morning. Thanks again for quick reply

I was wrong no delay comes on with key

I think it has a delay, I will check in about an hour and post back. Thanks for the quick response

Ok I just bought a 99 dodge 3500 24v Cummins with 222,000 miles I have searched but cant find nothing with same symptoms like mine exact. When you barely touch pedal it revs really high when in park. When you try to drive it it takes off really good then dead pedal then picks back up after it falls to around 12-1500 rpms and goes again it will not stay at a constant speed. Try and it cuts out till rpms fall them picks back up again. It appears the pump is not the original, and the guy I bought it from had it at a shop trying to get it fixed and they said they tried a different apps. But I dont think they know much about these trucks. Any ideas? Also I have a problem with IOD fuse it blows the instant fuse touches but when I first test drove it the radio and stuff worked fine no problem but he did say it had IOD problem.