Fixed Part of the Problem

[jlwelding 21]

Well here it is, after the fourth ECM on my truck we tried a test ecm from cummins, and the surge that has been there for two years is gone. HEY But the miss is still there. Ok we put truck on a delete box and what that does is it bypasses the elec. in vp and bypasses the ecm, truck ran like a dream, could not belive it if I had not heard it with my own ears. So we still think there is something going on with ecm. We know for a fact it fixed the surge. Put old ecm back on and instant surge is back. Ok one thing I have learned is there are about 12 different ecms out there for a 01 so when someone tells you there all the same - there not, I found out the hard way.

[guesswho512 2]

wow! the wife and i are happy you got it figured out be for it became a target! is there a way to tell the difference on the ecm(ie part #, serial #, opening the case and looking)?

[jlwelding 21]

As far as opening it, I have to send it back as a core or I guess pay 250.00 and keep it. HA HA Still have miss problem but it did go away with delet box. So I am still thinking it is elec. problem in ecm or wire harness. A few more thousand dollars and I should have it. lmao

[KOYOTE 0]

dead miss or random?

[jlwelding 21]

It is sporatic comes and goes. It starts after eng. gets hot. Runs great as long as it is cool, as soon as eng. warms up it starts miss.

[KOYOTE 0]

did they let it getgood and hot on the break out box?

[jlwelding 21]

Yes, at the time I drove 30 mile to get there and it was missing good. Hooked up box and it ran great no miss took box off and right back to miss.

[KOYOTE 0]

sorry man i hate electrical problems its always a minor problem that take a week of diagnosis and i cant justify the nick in the wire, buried under the dash in the massive loom of wires caused by the c/b radio the guy around the corner hooked up for you for a 6 pack. give me a rod hung out the side of the eng. anyday.