Well if they tuned it and took all that stuff out then i'm not sure...can you get something like a scan tool or such and watch your trucks live data?That way you can watch your knock retard.Maybe your getting false readings and its retarding the truck by alot.
On the spacer dude take it off seriously.It only hiders power does not help at all.They have done dyno testing with them on the new trucks and they provide absolutly no power enhancements at all and in some cases they lost a little power.It's something that is just a known factor on the new motors.The older ones worked great but with the GEN III's they do no good at all.

 

Why not post in the Tuning and Diagnostics section,too?

 

I fixed my truck last night. The Cats were stopped up. Needless to say they aren't stopped up anymore and the truck runs damn good now.

 

MorepowerTY,
I don't have a clue as to your problem but I will be in Vegas around June 13th or 14th on my way back from Texas, I will have my logging software with me. I would be happy to scan your truck for you.
Mark

 

Better jump on a gracious offer like that!!

By the way, what is a good logging tool and how much $$
or do you just use your laptop and HPT?

 

I have both the Aeroforce gauge, AutoEnginuity, and a wide band 02. Obvious I can only use the AutoEnginuity software on his truck,
Actually I have a spare Aeroforce gauge I could bring with me and plug that into his ODB2 and just run a power source to it.

 

Yes still under warranty.

 

More than happy to let you scan the truck. I'm going take off the Throttle body spacer tomorrow and try it with it, I'll see waht happens. To freaken hot out right now. temp is 108 today and its only beginning of June.
Mark, I'm still leaning this website. Can you send me a PM and I'll give you my cell number, so when you come into Vegas, we can hook up.

 

Burning rubber, question on your cats, did your power come and go like mine is doing?

 

I'll post it Diag also.