Tune Up Ideas

jiminycricket · March 30, 2010

Hey guys,

i've got a 99 sierra with the 4.8L with 25xxxkm and it doesnt seem to have much power...i was thinking on giving it a complete tune up, plugs, wires, injector cleaner and intake cleaner to see if it will get any more "umph". i got the tranny rebuilt. You guys got any other ideas that mihgt help? Also i put a new alternator on and it has a really annoying whining sound to it. Do you think i could grease the bearing and it will go?

thanks

Mike@Diablosport · March 31, 2010

Hey guys,
i've got a 99 sierra with the 4.8L with 25xxxkm and it doesnt seem to have much power...i was thinking on giving it a complete tune up, plugs, wires, injector cleaner and intake cleaner to see if it will get any more "umph". i got the tranny rebuilt. You guys got any other ideas that mihgt help? Also i put a new alternator on and it has a really annoying whining sound to it. Do you think i could grease the bearing and it will go?

thanks

Look into a good tune, like the ones in the Predator, to wake that truck up right!

Add 15-20+ rwhp, better shifting, better throttle response, and the ability to read and clear codes, and datalog the PCM if you desire.

Thanks

Mike

jiminycricket · April 3, 2010

Hey guys,
i've got a 99 sierra with the 4.8L with 25xxxkm and it doesnt seem to have much power...i was thinking on giving it a complete tune up, plugs, wires, injector cleaner and intake cleaner to see if it will get any more "umph". i got the tranny rebuilt. You guys got any other ideas that mihgt help? Also i put a new alternator on and it has a really annoying whining sound to it. Do you think i could grease the bearing and it will go?

thanks

Look into a good tune, like the ones in the Predator, to wake that truck up right!

Add 15-20+ rwhp, better shifting, better throttle response, and the ability to read and clear codes, and datalog the PCM if you desire.

Thanks

Mike

Is there an outfit that is up in canada if so where abouts. Im pretty interested in this actually.

james

wurgs · April 3, 2010

Predator is a handheld tunner, can order online. Lew told me about a site Marylandspeed that has them for $325 shipped with the pc hookup so could do a custom tune later if you choose.

amtz.zero · April 3, 2010

The Diablo predator is a handheld tuner and you can order it from pretty much anywhere they sell truck accessories. But yeah, for more power, you need a tune.

Nytemare · April 3, 2010

Hey guys,
i've got a 99 sierra with the 4.8L with 25xxxkm and it doesnt seem to have much power...i was thinking on giving it a complete tune up, plugs, wires, injector cleaner and intake cleaner to see if it will get any more "umph". i got the tranny rebuilt. You guys got any other ideas that mihgt help? Also i put a new alternator on and it has a really annoying whining sound to it. Do you think i could grease the bearing and it will go?

thanks

Look into a good tune, like the ones in the Predator, to wake that truck up right!

Add 15-20+ rwhp, better shifting, better throttle response, and the ability to read and clear codes, and datalog the PCM if you desire.

Thanks

Mike

Is there an outfit that is up in canada if so where abouts. Im pretty interested in this actually.

james

You guys have a Lordco over there?

I know they carry them and they have very good deals on them.

Plugs/wires will help a lot...if you havent been using injector cleaner every month or so...thats where your gonna notice a big increase...fuel may be cleaner than ever...but its still plugs up injectors and stuff.

Search on here about seafoam...and do that to your engine. There should be a half million posts here about it and how to use it.