Gas Mileage worse after tune???? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Dave Coyle · 11-04-2010, 04:27 PM

I can't believe that you all are getting that bad of MPG!!! I had a tune with headers, cats, exhaust and CAI, the car runs strong, great 1/4 mile numbers and still pulled over 20MPG on my trip. Actually I got 22-23 MPG. Are you getting a good tuner to tune your cars?

Dave Coyle · 11-04-2010, 04:30 PM

Oh, I forgot to say that I get 17/18 MPG around town.

FRANK121 · 11-04-2010, 09:38 PM

Quote:

I can't believe that you all are getting that bad of MPG!!! I had a tune with headers, cats, exhaust and CAI, the car runs strong, great 1/4 mile numbers and still pulled over 20MPG on my trip. Actually I got 22-23 MPG. Are you getting a good tuner to tune your cars?

I got the SCT from Ted at Jannetty so it should be good. Do I need to reset the ECU or anything. I always drive it in sport mode .... will that make a difference?
Like I said I only commute around 10 miles a day and probably get on it once or twice a day? If I could get 17-18 around town and 20's on the Highway I would be stoked!

Maybe Ted can chime in but do I need to check something or try another tune?

DSX · 11-05-2010, 09:39 AM

Quote:

Originally Posted by zebra

it depends on what it was tuned for. if you're pulling more power from the engine, you're more than likely not gonna get as great of gas mileage. on the flip side, you can tune for great gas mileage & lose a bit of pep in the go pedal.

This is not true at all. Wide open throttle has nothing to do with part throttle fuel economy.

Chances are, it's your driving style. Cloosed loop pretty much negates steady state fueling error and as Frost said, you always end up at stoich.

If your AFM was shut off, that can definitely drop your fuel economy.

FRANK121 · 11-05-2010, 02:17 PM

Thanks David and welcome back

I sent you an email awhile back did you get it and if so give me a shout back

I have some more questions.

11-04-2010, 04:27 PM	#15
Dave Coyle Drives: 2010 SS , 1970 Z-28, 2002 Avalanche Join Date: Aug 2009 Location: Michigan Posts: 2,524 View My Garage	I can't believe that you all are getting that bad of MPG!!! I had a tune with headers, cats, exhaust and CAI, the car runs strong, great 1/4 mile numbers and still pulled over 20MPG on my trip. Actually I got 22-23 MPG. Are you getting a good tuner to tune your cars? __________________ IF IT'S WORTH HAVING, IT'S WORTH WAITING FOR!!!! (AND IT WAS) 434RWHP/403RWTQ Livernois Motorsports 2C Cam kit Kooks 1 7/8 LT Headers/Hi-Flo Cats/Corsa Exhaust Roto-Fab CAI / Port Intake Precission 2400/2800 Converter/3.73 AAM gears Livernois Motorsports Tune Best time: 11.97 @ 117 MPH

11-04-2010, 04:30 PM	#16
Dave Coyle Drives: 2010 SS , 1970 Z-28, 2002 Avalanche Join Date: Aug 2009 Location: Michigan Posts: 2,524 View My Garage	Oh, I forgot to say that I get 17/18 MPG around town. __________________ IF IT'S WORTH HAVING, IT'S WORTH WAITING FOR!!!! (AND IT WAS) 434RWHP/403RWTQ Livernois Motorsports 2C Cam kit Kooks 1 7/8 LT Headers/Hi-Flo Cats/Corsa Exhaust Roto-Fab CAI / Port Intake Precission 2400/2800 Converter/3.73 AAM gears Livernois Motorsports Tune Best time: 11.97 @ 117 MPH

11-05-2010, 02:17 PM	#19
FRANK121 Drives: 2022 Camaro ZL1 Join Date: Sep 2010 Location: Sullivan, Missouri Posts: 653 View My Garage	Thanks David and welcome back I sent you an email awhile back did you get it and if so give me a shout back I have some more questions. __________________ 2022 Black ZL1 RotoFab CAI, AWE Touring Edition Cat Back Exhaust. 665 Crank hp. est. and 660 Crank ft. lbs. est. Never been Dynoed

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Bad gas mileage with new exhaust on SS LS3	Larz29	Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons	18	09-24-2010 12:56 PM
Caddy CTS-V Gas Mileage = Z/28 gas mileage?	OldJedi	5th Gen Camaro SS LS LT General Discussions	25	07-31-2010 04:29 PM
Gas mileage for a brand new SS	sask-man	5th Gen Camaro SS LS LT General Discussions	43	07-06-2010 03:32 PM
How does your modification accept your gas mileage?	Heelhook22	Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons	1	12-15-2009 09:16 PM
Crappy gas mileage....	turtleretired	USA - Mid-Atlantic	4	10-19-2009 09:25 PM