Had a cam and charger put on and ever since ive had a horrible backfire when going from heavy load to no load shifting gears. It doesnt do it if i just let off the gas and let it decel. But if im accelerating fairly hard, as soon as i let off and press the clutch.. It backfires crazy loud, every time. Sometimes it will pop 2 or 3 times. Its not your typical gargle sound, Its straight up 12 guage goin off. Its soooooo annoying. Where can this be adjusted out in the tune? We worked on it a little right after full install, but not much. My tuner Said its very difficult to read in 2 bar density to figure out what it really needs or something. Any ideas? thanks

 

ask your tuner how long he has had the software and how long he has been tuning

 

X2....I'd be lookin for a competent tuner.

 

hes a pretty reputable tuner, Had the shop like 13 years or somethin. Its just so far to drive to work on it.

 

Having a shop doesnt mean he knows the software....yiur post is a direct relation to lack of software knowledge

 

tuners seem very few and far between round these parts. So i went with someone who was recommended on here and some other sites. But you hear good and bad about every shop. Hard to trust anyone really. And its a 3 hour drive to his shop.

 

What shop and tuner...what area

 

I had 2 different reputable shops destroy 2 motors. One was a forged HKE 365. Just a timing mistake with boost.

 

Theres more then a timing mistake......correct afr for fuel and timing used

Ive pushed 26* on 93/meth and never hurt a piston
Pushed 20* on 25 psi on e85 and never hurt a piston

 

George it was @ 14 lbs on 93. He said he meant to program 16* but did 26* instead. It blew a gasket and spun 2 mains. No meth. He apparently was some tuner from Plano that the shop hadn't used much and I got burned. At that point I gave up on that truck. Sure wish I knew how to tune. I think that's the biggest downfall of modding late models.