dunkle88

Ok guys, got a bit of a random possibly stupid question. Here is a list of things done to it so it can help settle obvious problems. It's an 01 shortwide with a 5.3, with a 222/224 .566 112 cam, part numbers an xr275hr from comp with pacesetter longtubes, stock intake manifold, 2500 stall, eaton locker in the rear with a tune done by a local tuner in fort smith, arkansas. Issue number 1 - it runs great except for at initial start up it fluctuates and tries dying on me when i first put it in gear. Issue number2 - i get around 14-15 around town and 17 tops on highway. I dont have many friends that have done as much stuff as i have to their trucks that i could reference my issue to so i was wondering if anyone with a close setup like this could tell me if this is normal for what i have or if i need to find a better tuner. Also it runs pretty rich all the time too which makes me think it's because of the tune, let me know what you think, thanks.

Vortec350ss

iTrader: (20)

How do you know its running rich? The stumble going into gear seems abnormal. That should be sorted out. Mileage isnt that far off honestly, if at all...

03sierraslt

iTrader: (22)

As mentioned how do you know it's rich? Sounds like your airflow tables need some work and your mileage is about normal.

dunkle88

it could be a bad way to go about thinking this way, but it smells so rich when I'm idling, and i check the plugs about every 6 months and usually replace them every other time because the porcelain is stained white and the tips are already burnt down a bit, which leads me to believe it's dumping fuel