what is with my idle???

[TxDieselKid]

Most of the time I start up my truck, I let it idle for a couple of minutes before I move, sometimes I'll hold the RPM's at 1000-1200 (I want a PS high idler), but most of the time my truck will do something I don't think it should.



It will be alright for about 10 seconds, then it will idle a little "harder" I guess you could say. At the same time, the in cab lights, and driving lights will get brighter, the a/c will blow harder, then about 10 seconds after that, it goes back to the "easy" idle, and the lights dim again, and the a/c goes back down. It has happen numerous times, and this is my first winter with the truck so is this normal.



Thanks,

AJB

 

[AggieJustin]

Grid heaters

That's just the effect from the grid heater cycling. Whenever they kick in, it's a pretty good amp draw so you see it in all the electrical systems.



As long as it stops once you get rolling (over 16mph I think is the number), you're OK.

 

[SOOT]

Grid Heaters

Its normal

 

[TxDieselKid]

well thats a relief...

Thanks for chimeing in guys, I didn't what to think.



Thanks once again,

Andrew

 

[Okie-Go]

If it is really cold mine will do it also. ( I keep mine in the garage) I can tell by the headlights getting dim then bright. Relax, and just drive it.