05 yokon xl 2500 random power loss

[Hough01]

Hi Guys. New to the site and need some help. I have a 2005 2500 6.0l that is randomly loosing power. It does not shut off, it is just like you took your foot off the gas for a moment and reapplied. It happens in clusters then clears up. It is getting more frequent. No engine codes. I replaced both fuel pumps with no change. Any ideas?

Thanks,

Keith

 

[cheerless]

I am experiencing a similar problem. Very random and cannot recreate it.

Chris

http://www.tahoeyukonforum.com/forum/showthread.php?t=52869

 

[chauncey0337]

Had a tune up lately. If not, might be a good time along with cleaning the throttle body and maf sensor.

 

[Hough01]

Changed plugs and wires, knock sensor, cleaned fuel injectors and maf sensor. New air filter. It is really getting annoying. Sometimes it does it right before a shift then it bangs into gear. Weird. Possably a TPS?


Thanks,
Keith

 

[chauncey0337]

You know if its had any tranny work?

 

[Hough01]

It doesn't feel tranny related. It feels like it is running out of gas. Engine rpm drops but doesn't shut off. It feels like if you pump the gas petal

 

[chauncey0337]

Fuel filter or the dreaded fuel pump. I replaced my fuel pump this last winter. It wasn't as bad as it was described but it wasn't fun either.

 

[Hough01]

05 yukon xl does not have a fuel filter and I already replaced BOTH fuel pumps! I feel like it has to be electrical at this point. It is very random.

 

[AA1PR]

I had mine quit yesterday after hitting a major hole in the dirt road

I had UO107 & P1258 code errors

after replacing the coolant temp sensor the P1258 & UO code are gone but the DIC still states random loss of power & wont start

in the dark here, hopefully i find a shop that knows whats wrong soon

http://www.youtube.com/watch?v=gtK4oajcO0Y&list=UUcNGw3X3lcNI4ZXqzQZlnOg

any help is greatly appreciated

 

[84TAguy]

Having the same issue with my 05 Denali. 168,000 km. Just started recently.