Originally Posted by 03sierraslt

What year.......?

Originally Posted by GM_Devil

gotta risk it to get the biscuit. am i right!

Originally Posted by TAPyvehc93

Guys, the only thing thats changed since the last tune was the fuel pump. Its still returnless and running off the stock fuel pressure regulator, pressure relief valve and fuel filter. There are a few other members on here that have installed this pump and it ran fine without a tune. Besides, its a variable voltage pump. I would assume if the pressure was too high the FPR would lower the voltage. Truck is turbo by the way and it will be getting tuned once the new intake goes on. Truck will also not see anymore boost until it gets retuned. And the plugs look fine. But this is my dd.

Originally Posted by N20zuki

It doesn't matter what other people have done as two similar builds are not the same... You are backfiring at WOT, you still have yet to include your setup so we had to assume its Turbo'd, With that said noises that go boom at WOT on a forced inducted setup is either a hurt motor or a poor tune.

With that being said, you should get engine management gauges for reference, Fuel pressure, Wideband and Boost gauge are not needed but are a great investment to help diagnose issues and to babysit the motor for hurting itself, especially if it is your daily driver.