Straight piped now poor gas mileage?

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Oct 3, 2006 | 12:56 PM

99redhtvette

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Straight piped now poor gas mileage?

hey guys just wondering i installed the borla straight pipes and now my car seems to be eating gas..is it just my right foot plowing it to it more? or does changing exhaust result in worse gas mileage?? thanks!!!

Oct 3, 2006 | 01:27 PM

TLewis4095

Le Mans Master

Joined: Aug 2001

Posts: 8,145

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From: Bradenton FLORIDA

ANy time you change intake or exhaust you should have it tuned. The car may be adding fuel because it thinks a lean condition exist. You say straight pipes....if you eliminated the O2's it could default to open-loop and run rich. A tune can fix it or O2 sims can also.

Oct 3, 2006 | 02:00 PM

99redhtvette

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no its just from the x-pipe back..the borla straight pipe exhaust..stock cats and o2's are still there. do i really need a tune just for a simple exhaust? damnit.lol anybody else?

Oct 3, 2006 | 02:04 PM

patton

Safety Car

Joined: Jun 2004

Posts: 3,579

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From: panama city beach florida USA

St. Jude Donor '09

how long ya had them on ? it takes awhile for the emc to learn . disconnect the batt for 1 min.

Oct 3, 2006 | 02:38 PM

DickieC.99

Pro

Joined: Nov 2003

Posts: 682

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From: Alexandria VA

my money is on your right foot

Oct 3, 2006 | 02:45 PM

99redhtvette

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ive had them on since sunday evening.. we'll see when i drive her up to philadelphia on fri

..i used to be able to make it in a tank with a 1/8th left

Oct 3, 2006 | 02:52 PM

EStreeter

Burning Brakes

Joined: Feb 2005

Posts: 752

Likes: 1

From: Tulsa OK

Get a pair of ear plugs or head phones so you can't hear the exhaust and your mileage will probably double.

Oct 3, 2006 | 02:53 PM

thabeast

Racer

Joined: May 2006

Posts: 498

Likes: 1

From: Pembroke Pines FL

ive had the straight pipes on since...April...at first gas was just disappearing!! so i had to ease off the noise-maker!!!....but yea, the power and sound are the temptations for bad gas mileage....GOOD LUCK!!!