Need some help

[ledesma54]

Well i had to take the gto in for a new stall and i picked it up today, well idk if i lost my tune but its sputtering really bad driving around in town iam down to like 6mpg and, on the highway going its sputtering the worst and i use to get 22mpg now iam only getting 12mpg, I have no engine light and iam going to check all the plugs and wires tomm when its light. What else should i be checking for? IDK were to start with this.
Thanxs

[TokerM]

Take it right back to them and have the shop fix it to a drivable condition? Any of those symptoms there before the shop got their mitts on it?

[ledesma54]

No nothing but they wouldnt do anything to the tune???? Ive taken the car to them when they built my tranny and it was fine when i got it back from them.

[RyanJM]

Defiantly go back and have them.fix it.

[ledesma54]

The car has
TSP Torque V2 on a 112 LSA with PRC Dual Valve Springs
LS7 lifters
Power bond 25% under drive pulley and belts
OEM LS6 Oil Pump with new o-ring
PRC stage 2.5 5.3's ls6 cnc ported heads
Cloyes Hex-A-Just Timing Set
Comp Cams Rocker Arm Trunion Upgrade for LS rockers
Fast intake 90mm
90mm throttle bodie
oil catch can, Pacesetters LT Headers,3500 Stall,

If that helps at all

[ledesma54]

I found the prob today, it ended up being a vacuum leak on the back of my fast (think its the pvc or something like that idk) but were good now.

[cammed goat]

Check or clean your MAF sensor as well. If you have drivability issues with no check engine lights, then most likely your MAF is dirty. I had my radiator replaced a few months ago and when I left my tuner, my car would buck under throttle. I turned around and went back and they found a low MAF code on their scanner. They took out my MAF and cleaned it. Took it for a test drive and to this day all is good.

[jb3golf]

Glad you found your problem out ledesma 54...........AND it cost you ZERO dolla's!!!!