Author Topic: GM 6.6L Duramax Loss of power  (Read 8726 times)

January 30, 2010, 04:26:42 pm

catlin_cava

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GM 6.6L Duramax Loss of power
« on: January 30, 2010, 04:26:42 pm »
OK its a 6.6L duramax turbo diesel.
267,000kms on it

1st to 3rd I have power right to my fuel governer at 3500RPM,

4th to 6th I loose power when i get around 1700RPM if my foot is into it. If I come into it lightly i have more power but you don't hear the turbo. when I give it a bt harder the truck buggs and all you hear is the turbo whistle.

6th itself has hardly anypower.

The truck was working great this morning, then it started acting up



Catlin

2012 VW Golf 2.5 5speed Deep Black Pearl
1999.5 VW Jetta TDI Bosch .216mm injectors and Malone stage 2, soon 11mm pump and vnt 22(parked for the winter)
2010 VW Golf City 2.0L "Hers"

Reply #1January 31, 2010, 12:22:52 am

8v-of-fury

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Re: GM 6.6L Duramax Loss of power
« Reply #1 on: January 31, 2010, 12:22:52 am »
Quote from: CatlinGun
OK its a 6.6L duramax turbo diesel.

There's your problem CatlinGun

Can't rely on anything post-1992 ;)
« Last Edit: January 31, 2010, 10:43:08 am by 8v-of-fury »

Reply #2January 31, 2010, 10:39:57 am

catlin_cava

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Re: GM 6.6L Duramax Loss of power
« Reply #2 on: January 31, 2010, 10:39:57 am »
I now have no power above 2000RPM even in neutral.
Catlin

2012 VW Golf 2.5 5speed Deep Black Pearl
1999.5 VW Jetta TDI Bosch .216mm injectors and Malone stage 2, soon 11mm pump and vnt 22(parked for the winter)
2010 VW Golf City 2.0L "Hers"

Reply #3January 31, 2010, 10:44:24 am

8v-of-fury

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Re: GM 6.6L Duramax Loss of power
« Reply #3 on: January 31, 2010, 10:44:24 am »
Whoa.. this is the same truck that had the gauges flying all over the place right!?!?

Maybe it's finally time for your boss to have it in for work? What were his words.. "don't come to me unless there is a real problem" ??

I think this about qualifies :P

Reply #4January 31, 2010, 11:15:03 am

catlin_cava

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Re: GM 6.6L Duramax Loss of power
« Reply #4 on: January 31, 2010, 11:15:03 am »
Whoa.. this is the same truck that had the gauges flying all over the place right!?!?

Maybe it's finally time for your boss to have it in for work? What were his words.. "don't come to me unless there is a real problem" ??

I think this about qualifies :P

CEL is on and he doesn;t want us reving over 2000RPM...It feels like my fast idle is on but its not....
Catlin

2012 VW Golf 2.5 5speed Deep Black Pearl
1999.5 VW Jetta TDI Bosch .216mm injectors and Malone stage 2, soon 11mm pump and vnt 22(parked for the winter)
2010 VW Golf City 2.0L "Hers"

Reply #5January 31, 2010, 12:01:35 pm

Rabbit on Roids

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Re: GM 6.6L Duramax Loss of power
« Reply #5 on: January 31, 2010, 12:01:35 pm »
fuel problem of some sort. or a sensor. these older GM's are kinda picky. what engine does it have in it? an LLY?

Reply #6January 31, 2010, 12:17:11 pm

catlin_cava

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Re: GM 6.6L Duramax Loss of power
« Reply #6 on: January 31, 2010, 12:17:11 pm »
fuel problem of some sort. or a sensor. these older GM's are kinda picky. what engine does it have in it? an LLY?

I fueled yesterday morning at the I24 Cardlocks(Irving Cardlocks) about 45 minutes later i started getting problems with the truck. Now I can rev again in neutral and back to the orginal problem. The boss told me to dump 2 canisters of gasline antifreeze.

The other drive has had problems there before also. and Nat's (my gf) family as had problems with Irving fuel with water in the trucks also.
Catlin

2012 VW Golf 2.5 5speed Deep Black Pearl
1999.5 VW Jetta TDI Bosch .216mm injectors and Malone stage 2, soon 11mm pump and vnt 22(parked for the winter)
2010 VW Golf City 2.0L "Hers"

Reply #7January 31, 2010, 12:22:39 pm

Rabbit on Roids

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Re: GM 6.6L Duramax Loss of power
« Reply #7 on: January 31, 2010, 12:22:39 pm »
kinda almost seems like a water issue. try draining the fuel filter and see what comes out?

Reply #8January 31, 2010, 12:54:24 pm

catlin_cava

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Re: GM 6.6L Duramax Loss of power
« Reply #8 on: January 31, 2010, 12:54:24 pm »
kinda almost seems like a water issue. try draining the fuel filter and see what comes out?

I ran the stuff in the system and the CEL is now off, and I've got a bit more power, its still bugging out in 4th and 5th. If I feather the peddal I get more power. Its going to the dealer tomorrow.
Catlin

2012 VW Golf 2.5 5speed Deep Black Pearl
1999.5 VW Jetta TDI Bosch .216mm injectors and Malone stage 2, soon 11mm pump and vnt 22(parked for the winter)
2010 VW Golf City 2.0L "Hers"

Reply #9February 01, 2010, 09:30:10 am

burn_your_money

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Re: GM 6.6L Duramax Loss of power
« Reply #9 on: February 01, 2010, 09:30:10 am »
It does sound like it could be contaminated fuel. Let us know what the dealer says
Tyler

Reply #10February 01, 2010, 10:16:51 am

catlin_cava

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Re: GM 6.6L Duramax Loss of power
« Reply #10 on: February 01, 2010, 10:16:51 am »
Well the boss hasn't touched or moved the truck, if he doesn't take it to the dealer i'm going to drive it till it dies, and let him learn his lesson.
Catlin

2012 VW Golf 2.5 5speed Deep Black Pearl
1999.5 VW Jetta TDI Bosch .216mm injectors and Malone stage 2, soon 11mm pump and vnt 22(parked for the winter)
2010 VW Golf City 2.0L "Hers"

Reply #11February 02, 2010, 01:13:59 pm

catlin_cava

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Re: GM 6.6L Duramax Loss of power
« Reply #11 on: February 02, 2010, 01:13:59 pm »
The boss dropped it off yesterday at GM...turns out the fuel filter was plugged solid. replaced the filter and VOLA the truck works great again
Catlin

2012 VW Golf 2.5 5speed Deep Black Pearl
1999.5 VW Jetta TDI Bosch .216mm injectors and Malone stage 2, soon 11mm pump and vnt 22(parked for the winter)
2010 VW Golf City 2.0L "Hers"

Reply #12February 03, 2010, 10:49:16 am

Rabbit on Roids

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Re: GM 6.6L Duramax Loss of power
« Reply #12 on: February 03, 2010, 10:49:16 am »
The boss dropped it off yesterday at GM...turns out the fuel filter was plugged solid. replaced the filter and VOLA the truck works great again

someone else could have checked this and saved the hassle. lol

Reply #13February 03, 2010, 11:49:13 am

catlin_cava

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Re: GM 6.6L Duramax Loss of power
« Reply #13 on: February 03, 2010, 11:49:13 am »
Yes I Could of checked that, but my limit of maintance on the truck is to check the oil and fill the washer fuild. We dont do work on our trucks
Catlin

2012 VW Golf 2.5 5speed Deep Black Pearl
1999.5 VW Jetta TDI Bosch .216mm injectors and Malone stage 2, soon 11mm pump and vnt 22(parked for the winter)
2010 VW Golf City 2.0L "Hers"

Reply #14April 12, 2010, 12:59:12 am

FoXBoXRaCiNG

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Re: GM 6.6L Duramax Loss of power
« Reply #14 on: April 12, 2010, 12:59:12 am »
Every 25kkm for fuel filter (asIdo) and I spin on a fresh tranny filter for the sake of 15 bux!!! I've read done lot's from here:
http://www.duramaxforum.com/forum/
My cat has A.D.D :(

 

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