Help...duramax forum was no help...
- Thread starter dmaxx01
- Start date
I wouldn't really say this is true. Forums are like an old pair of shoes, after you spend enough time in them you feel comfortable with them. Most of the forums have the same people bouncing back & forth anyway.
BTW....Welcome
Start by changing to your stock tune. If it's still doing it, than that rules out tuning as a issue. After that, proceed to check your balance rates. From there check the actual vs. desired rail pressure. Sounds like CP3, FPR, or injectors -- IIRC I think it's higher pressures that cause a rattle and rough idle, but I could be very well wrong and it be the other way around. Either way, you'll be able to tell from the logs.
If it's nothing from there, then you go on a troll hunt unfortunately. :/
If it's nothing from there, then you go on a troll hunt unfortunately. :/
I would check your pulleys, belt tension.. 78k and 10 years is alot for a belt.. Mainly the 10 years.
Sent from the DF.....:thumb:
Sent from the DF.....:thumb:
thanks guys! first thing i did was tune it back down to stock. no change in sound. i will have balance rates checked tomorrow. you know the cracked flex plate doen't sound that far fetched. the noise is loudest under truck where engine and tranny meet. maybe the injector issue is just echoing through the exhaust or maybe its the flywheel. but if it was the flywheel would it stop rattling after 1000 rpms? the rattle is perfectly timed and consistent with the rpms.
It may be the flexplate being you can hear it better down there. The reason it clears up is centrifical force..
For non-tune related issues, it's often exhaust related. Look for wear spots that would indicate contact with other metal pieces.
My uncles truck was making a odd noise . After a bit of checking around ,we found the connection between the down pipe and the front exhaust pipe had loosened up.
we cranked it down and the noise was gone.
or u could remove the serp. belt and eliminate belts and pulleys.
There was a bulliten early in 2002 that had to do with a noise , that would occur right after a oil change.
Just a couple shots in the dark to think about
Good luck
we cranked it down and the noise was gone.
or u could remove the serp. belt and eliminate belts and pulleys.
There was a bulliten early in 2002 that had to do with a noise , that would occur right after a oil change.
Just a couple shots in the dark to think about
Good luck
Check your tq converter bolts make sure there tight and if they are its probably a flexplate
please help...lb7 bad rattle...
here's a link to video of what the truck is doing...
http://www.youtube.com/watch?v=-_pIRawBnDI
here's a link to video of what the truck is doing...
http://www.youtube.com/watch?v=-_pIRawBnDI
U need to start eliminating parts and pieces. Get some soapy water in a spray bottle and spray down all the potential exhaust leak spots. If nothing, then move on to the flywheel/TC. Then pull the belt off and start it up and see if it changes. It's a novel idea called process of elimination. I think al gore invented it.:spit: