'01 Duramax problem

[ras308]

I have an '01 with 204,000 miles on it. The injectors were replaced some time ago under warranty. It has started to smoke at idle and sometimes it lopes, but it still pulls really well? I have noticed the mileage is worse than it used to be? Any ideas? Thanks.

[Jaspro]

I bet it's the injectors again. Fixing to have to do the same to mine

[ras308]

?

I don't think so, it's pulling to good? And, I don't think this is what it did the first time?

[jimmy o]

o rings on injectors fixing to do mine same symptoms smoking at idle and slow speeds and when you let off pedal coming to a stop. only difference is mine is a ford

[Evictor]

Have to have your balance rates checked to be sure. In my 03 the injectors went @ 80k miles and repaced under warranty. I sold it at 160k when it just started giving a hint of a problem since I was out of warranty. Thoes LB7 engines cost $4000-5500 to replace injectors and I didnt want the headache.

[Jaspro]

Mine is doing exactlly the same thing and it is the injectors. Only difference is my mpg is unchanged

[jimmy o]

My milage dropped also by about 7 miles per gallon. Is the smoke white blue black?

[Smart]

I don't think so, it's pulling to good? And, I don't think this is what it did the first time?

I'm betting injectors again. Just helped a buddy replace all 8 in his 2003 Duramax that was running like a top but smoked real bad. Had it not been for the smoke he'd have never known they were going bad. 4 out of 8 were bad and on both sides so he replaced them all.

[Smart]

One more thing....Wood Chevy in Decature charged by buddy $65 for a diagnostic test and that confirmed what we had thought all along. You might go that route first before you start throwing parts at it.

[BrianL]

Injectors. If they replaced the injectors back before they corrected the injector, it just bought you more time. You can by injectors, and pay to have them installed $1-2K less than just having them installed turn key. You have to deal with ordering and core charge($1600), but worth the headache. I have mine replaced for $3500.00 with DDP 50hp injectors. Could have gone back stock and saved another $700.

DO like Smart said and have them tested.

[ras308]

It is blue/black smoke. Does anyone know some place in College Station? I can't afford enough vaseline to take it to a dealer!!!

[Smart]

One more thing....Wood Chevy in Decature charged by buddy $65 for a diagnostic test and that confirmed what we had thought all along. You might go that route first before you start throwing parts at it.

Man what a cluster of a type job...I've really got to slow down on the phone and these fat fingers..

Let's try that again...

One more thing....James Wood Chevy in Decatur charged my buddy $65 for a diagnostic test and that confirmed what we had thought all along. You might go that route first before you start throwing parts at it.

[Low Fence]

That model eats injectors. We have one with about 220K on it (2001). One blown motor @ 30K, transmission at 65K, honestly no clue on injectors. Haven't kept up in a while but at one time counting "warranty work" (what they paid for but priced out) it had over $60K in repairs. Fuel milage aint what it used to be...........but the fuel aint what it used to be.....and its old Still pulls as good as a GM product can anyway

[ras308]

I just checked the codes, it's giving me a P1781. Is that one familiar with anyone? Thanks.

[BrianL]

http://www.justanswer.com/chevy/1a0ka-hi-just-picked-2001-2500-duramax-drove-300-miles.html