Lower MPG - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

elmayimbe · 10-05-2015, 01:02 PM

I need some help .
I have 13 camaro rs with a cai, VTC and muffler delete. plus a catch can
My MPG last week was like 16.3 and now im getting like 14 if lucky.
Any ideas on whats going on?
Thanks group.

ToddB · 10-05-2015, 01:06 PM

Stop flooring it.

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elmayimbe · 10-05-2015, 01:16 PM

Quote:

Originally Posted by ToddB

Stop flooring it.

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I'm still flooring the same and I have my VTC set on 7 .
By the way thanks for the reply.

xc_SS/RS · 10-05-2015, 01:35 PM

Take the vtc off. All it does is increase signal strength from the throttle pedal to the throttle sensor telling it that when you have the pedal half way down that it should be floored. Take it off and you'll get the mpg back.

elmayimbe · 10-05-2015, 01:52 PM

Quote:

Originally Posted by xc_SS/RS

Take the vtc off. All it does is increase signal strength from the throttle pedal to the throttle sensor telling it that when you have the pedal half way down that it should be floored. Take it off and you'll get the mpg back.

So the VTC is the cause of me having lower mpg? I had the VTC for like 8 months with problems and the MPG last week was like 17.
thanks for the feedback too.

Tenring · 10-05-2015, 02:36 PM

Quote:

Originally Posted by ToddB

Stop flooring it.

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tmaleck · 10-05-2015, 02:38 PM

Quote:

Originally Posted by elmayimbe

So the VTC is the cause of me having lower mpg? I had the VTC for like 8 months with problems and the MPG last week was like 17.
thanks for the feedback too.

Did you fill up at a different gas station than usual? Change grades maybe? Focus on what is different this week than last week first. Did you work in the engine compartment and knock a hose loose ? Did the temperature drop more than 10 degrees on average.

Tim

TommyTheCat · 10-05-2015, 02:39 PM

Yep probably the throttle controller or your driving habits. On my V6 I get 17-18 city if I drive carefully, only 14-15 if I don't. Freeway I'll get 26 flooring it or 30 carefully. If I'm extremely careful I'll get 33 but depends on driving conditions

I also get terrible gas with 87 for whatever reason, but I thought the LFX was supposed to be flex fuel so that probably has something to do with it

arkentect · 10-05-2015, 02:45 PM

I dont know how you're driving but in my LLT I drive like I stole (how camaros are meant to be) and I still average 22.6 combined

xc_SS/RS · 10-05-2015, 03:02 PM

Quote:

Originally Posted by elmayimbe

So the VTC is the cause of me having lower mpg? I had the VTC for like 8 months with problems and the MPG last week was like 17.
thanks for the feedback too.

They have been known to cause issues so I think it couldn't hurt to try it for a week with the controller off. Maybe two weeks to adjust to the pedal being normal again.

Did you do more driving in the city or in traffic? That will cause the mpg to drop considerably as well as excessive idling. As another person mentioned check for any hoses that were knocked off or maybe a connection to something is loose. Also check your air filter if you have an aftermarket intake. With my intake I clean it every oil change (vararam Otr intake, catches lots of bugs and dirt).

Tenring · 10-05-2015, 03:05 PM

Quote:

Originally Posted by arkentect

I dont know how you're driving but in my LLT I drive like I stole (how camaros are meant to be) and I still average 22.6 combined

That's right about what my wife is getting with hers, driving it like it should be.

When I am on the phone with her I always hear a Roarrrrrr from the NPP and I am like what was that, she always replies, someone that needed passing!

ravensjeff · 10-05-2015, 03:23 PM

I drive mine like I stole it (and being chased by the law) and still get 17.0 mpg with my set up. You definitely have something wrong. I'd be surprised if it wasn't the THC. Did you get a tune as well?

GretchenGotGrowl · 10-05-2015, 03:38 PM

Quote:

Originally Posted by elmayimbe

I need some help .
I have 13 camaro rs with a cai, VTC and muffler delete. plus a catch can
My MPG last week was like 16.3 and now im getting like 14 if lucky.
Any ideas on whats going on?
Thanks group.

When do they change over to winter blend where you are? That might be the cause.

elmayimbe · 10-05-2015, 04:55 PM

Quote:

Originally Posted by tmaleck

Did you fill up at a different gas station than usual? Change grades maybe? Focus on what is different this week than last week first. Did you work in the engine compartment and knock a hose loose ? Did the temperature drop more than 10 degrees on average.

Tim

Same gas station(chevron 87)
I will check to see if i have hose loose or something. thanks

10-05-2015, 01:02 PM	#1
elmayimbe Drives: 2013 Camaro 2lt RS Join Date: Apr 2015 Location: long Beach Posts: 364	Lower MPG I need some help . I have 13 camaro rs with a cai, VTC and muffler delete. plus a catch can My MPG last week was like 16.3 and now im getting like 14 if lucky. Any ideas on whats going on? Thanks group.

10-05-2015, 01:35 PM	#4
xc_SS/RS Drives: 2010 Camaro SS/RS Join Date: Mar 2014 Location: somewhere in MD Posts: 4,883	Take the vtc off. All it does is increase signal strength from the throttle pedal to the throttle sensor telling it that when you have the pedal half way down that it should be floored. Take it off and you'll get the mpg back. __________________ 2010 2SS/RS Z/28 intake, NW, FAST 102, speed engineering LT's, some exhaust, ATI -10% pulley, GM flex fuel injectors, DSX flex fuel sensor, MGW shifter, HP Tuners, some suspension work, stickers and a little weight loss. 12.63 @113.53

10-05-2015, 02:45 PM	#9
arkentect Drives: 2010 Camaro SGM 1LT M6 Join Date: Jan 2015 Location: Rochester, NY Posts: 1,630	I dont know how you're driving but in my LLT I drive like I stole (how camaros are meant to be) and I still average 22.6 combined __________________ Arkentect's Build Thread!! - UPSTATE C5 MEMBER 2010 SGM M6 1LT - SOLD Current - 2009 C6 Corvette Z51

10-05-2015, 03:23 PM	#12
ravensjeff 100% Chevy & Harley Man Drives: 2010 2SS: Blown LSX 376-B15 Join Date: Feb 2009 Location: Eldersburg,MD Posts: 2,211 View My Garage	I drive mine like I stole it (and being chased by the law) and still get 17.0 mpg with my set up. You definitely have something wrong. I'd be surprised if it wasn't the THC. Did you get a tune as well? __________________ LSX 376-B15, TVS2300 SC, Harland Sharp Rockers w/ Trunion Bearings, ATI Balancer/keyed, AR LT Headers/Borla Catback Exhaust, DSS 1400 HP Axles, DSS aluminum driveshaft, 3.70, Hotchkis Springs/Sway bars, Forgeline SO3P Aluminum Wheels (20x9.5 F/20x11 R)w/ Hidden Titanium Hardware, Nitto NT05 Tires (27540ZR20 F/31535ZR20 R), Billet LPE brake/gas pedals, Escort 9500ci Radar Detector Laser Jammer, Roto Fab CAI with Ice Silver box, Carbon fiber tube/MAF Housing Assy, LPE Aluminum coil covers, SS9 Sleeper Fiber Glass Hood (ACS), Carbotech 1521 ceramic brake pads, Elite catch can.

10-05-2015, 01:06 PM	#2
ToddB Drives: 2011 2SS Convertible Supercharged Join Date: Nov 2010 Location: WI Cert Welder Navy NSSN Posts: 1,157	Stop flooring it. Sent from my iPhone using Tapatalk

10-05-2015, 02:39 PM	#8
TommyTheCat SHKE BKE Drives: 2013 Camaro Join Date: May 2014 Location: SoCal Posts: 3,108	Yep probably the throttle controller or your driving habits. On my V6 I get 17-18 city if I drive carefully, only 14-15 if I don't. Freeway I'll get 26 flooring it or 30 carefully. If I'm extremely careful I'll get 33 but depends on driving conditions I also get terrible gas with 87 for whatever reason, but I thought the LFX was supposed to be flex fuel so that probably has something to do with it