Randomly shuts off, then restarts after it sits for an hour or 2?

[letitsnow]

I had the same problem with my Suburban. It wound up being a dead cell in the battery.

I'll test the battery tomorrow. Thanks.

 

[letitsnow]

I replaced the coil this morning with an skp brand one that I had gotten from rock auto. I also cleaned all icm connection/surfaces etc and bolted it all back together. I sure am glad that I brought my cordless grinder and drill with.

 

[PlayingWithTBI]

I also cleaned all icm connection/surfaces etc and bolted it all back together.

With fresh thermal paste too?

 

[Kens1990K2500]

Good luck resolving your problem. I am having a similar issue, although my truck is a TBI

 

[letitsnow]

I had the same problem with my Suburban. It wound up being a dead cell in the battery.

I checked the battery today. Even though it was putting out good voltage, and was starting the truck really well - it failed when I did the load test. I wasn't believing it, because it is a 13 month old exide marathon max agm that I bought from rock auto. I figured it can't be bad yet.

I went to auto zone and they tested it - same results, good voltage but some kind of short in 1 of the cells. So, I replaced it with their duralast gold. Hopefully that holds up, and hopefully rock auto will warranty my bad exide. I don't even remember if/what the warranty was on that.

After installing, I ran my battery test on the new duralast, and it passed.

I sure have been been having a lot of new parts fail prematurely lately...

 

[letitsnow]

With fresh thermal paste too?

Yes. Also - one of the oem bolts was a bit messed up, so I drilled both bolt holes out and used new bolts/nuts to attach it to the aluminum plate.

 

[letitsnow]

Good luck resolving your problem. I am having a similar issue, although my truck is a TBI

Thanks. Good luck to you.

 

[BNielsen]

I checked the battery today. Even though it was putting out good voltage, and was starting the truck really well - it failed when I did the load test. I wasn't believing it, because it is a 13 month old exide marathon max agm that I bought from rock auto. I figured it can't be bad yet.

I went to auto zone and they tested it - same results, good voltage but some kind of short in 1 of the cells. So, I replaced it with their duralast gold. Hopefully that holds up, and hopefully rock auto will warranty my bad exide. I don't even remember if/what the warranty was on that.

After installing, I ran my battery test on the new duralast, and it passed.

I sure have been been having a lot of new parts fail prematurely lately...

It's been a crapshoot lately on parts; I feel your pain

 

[letitsnow]

I pulled our camper back to the Oklahoma sand dunes today. The truck ran great again. All seems back to normal.

Thanks for all of the ideas and help. Next time this happens, I will be better prepared on how to attack the problem.

 

[Super_chevy]

This happened to me after I put in the 383 turns out my motor starter was getting over heated and the truck would shut off then wouldn’t start up until the starter cooled back down. Flush my coolant and refilled found out shop filled it up with straight water no bueno with these trucks has to be dextrose no issues after that