Blowndenalixl

Hi Folks - the title of the thread says it all.

Just this last week the Denali has started being a bit of a dog. Can only manage 3 lbs of boost (normally max out at 5lbs) and just not as much jam off the line. I would appreciate advice as to what I might check for.

Other details - have a 2-bar tune from Campbell automotive that has worked fine for over a year now. Aftermarket exhaust and Volant air intake. Corvette Servo is the only tranny work that has been done. Run synthetic oils.

So I am stumped. And will gladly take any advice.

Thanks

D

DOMLS2

how is the belt

Blowndenalixl

I shall give it a check in the morning. Mighty fine suggestion. Do you think it may be belt slippage perhaps? If so, how do I fix that? Obv more tension required but not sure how to do that (paid to have the maggie installed, I am not that mechanical).

Thanks - I will check it out.

D

Doobie

iTrader: (2)

Tensioner should be at half way of travel with engine off. If it is less than that you can buy a belt that is 1/2"~1" shorter, this will help increase belt tension. Also make sure your bypass is fully closing for maximum boost.

trever1t

iTrader: (14)

No expert here but first thing I'd do is check/clean the airfilter and MAF, swap plugs.

leftcoast32

iTrader: (4)

I agree, I would also replace the belt if you have alot of miles on it. You could order the upgraded Tensioner but I would look for the problem first.

DrX

iTrader: (7)

Also check that the bypass actuator is working. Check that the vac line is attached to it and that it closes the valve when the truck is started.

BlownChevy

iTrader: (20)

Balancer is spinning.

Blowndenalixl

Some quick thoughts:

1. I have about 40,000 hassle free miles on the kit.
2. Have a 2 bar tune, not using MAF, will check air cleaner
3. What does "Balancer is spinning" mean - can you post a pic of what the balancer is please - I am very low on the technical knowledge scale

Thanks for all the weighing in folks!

D

XLR8NSS

iTrader: (4)

Check this thread out D. I'm thinking either balancer spinning or belt slipping. Do you see any black dust around the belt/pulley areas?

https://www.performancetrucks.net/fo...d.php?t=415160