Exhaust decreasing gas mileage?
03-25-2007, 11:25 PM
#1
3rd Gear Member
Thread Starter
Join Date: Dec 2006
Location: Plymouth MA
Posts: 572
Exhaust decreasing gas mileage?
I just recently installed my exhaust and i have noticed a huge decrease in gas mileage. . . at the same time i increased the spark advace on my diablo tuner and i need to run 93. . . . after two tanks i figured i wasjust wasting gas romping on it to hear my exhaust. . . but i've been driving normal now and it is still horrible. . . anybody have any ideas? Or does it come with the mods?
03-25-2007, 11:30 PM
#4
3rd Gear Member
Join Date: Feb 2006
Location:
Posts: 823
RE: Exhaust decreasing gas mileage?
if anything, you should be getting better gas with the new exhaust. the new exhaust should be giving you better flow which makes the engine work less hard and burn less fuel. i would try to take the spark back to where it was before and see if the problem continues. that way you know if it's the exhaust or the spark that's decreasing your fuel economy
03-25-2007, 11:33 PM
#5
I ♥ Acer
Join Date: Mar 2007
Location:
Posts: 42
RE: Exhaust decreasing gas mileage?
ORIGINAL: 06mustang88
if anything, you should be getting better gas with the new exhaust. the new exhaust should be giving you better flow which makes the engine work less hard and burn less fuel. i would try to take the spark back to where it was before and see if the problem continues. that way you know if it's the exhaust or the spark that's decreasing your fuel economy
if anything, you should be getting better gas with the new exhaust. the new exhaust should be giving you better flow which makes the engine work less hard and burn less fuel. i would try to take the spark back to where it was before and see if the problem continues. that way you know if it's the exhaust or the spark that's decreasing your fuel economy
This guy's also a retard. Jesus christ. How many noobs on this site?
03-25-2007, 11:43 PM
#7
4th Gear Member
Join Date: Jul 2006
Location: Pittsburg, CA (BAY AREA!)
Posts: 1,399
RE: Exhaust decreasing gas mileage?
ORIGINAL: reelfast02cobra
This guy's also a retard. Jesus christ. How many noobs on this site?
ORIGINAL: 06mustang88
if anything, you should be getting better gas with the new exhaust. the new exhaust should be giving you better flow which makes the engine work less hard and burn less fuel. i would try to take the spark back to where it was before and see if the problem continues. that way you know if it's the exhaust or the spark that's decreasing your fuel economy
if anything, you should be getting better gas with the new exhaust. the new exhaust should be giving you better flow which makes the engine work less hard and burn less fuel. i would try to take the spark back to where it was before and see if the problem continues. that way you know if it's the exhaust or the spark that's decreasing your fuel economy
This guy's also a retard. Jesus christ. How many noobs on this site?
03-25-2007, 11:49 PM
#8
4th Gear Member
Join Date: Jul 2006
Location: Pittsburg, CA (BAY AREA!)
Posts: 1,399
RE: Exhaust decreasing gas mileage?
To the original poster, exhaust is supposed to give you better gas mileage. So it's not from the mods you just put on. I don't have any other ideas of what it might be though. If I remember correctly, I read something on here a while back saying if you have an exhaust leak, your CPU can read that as a lean condition and try to compensate by adding more fuel. So I'm thinking that this could be true, and could be what SVTBill is getting at. But I don't know how true this is. Someone correct me if I'm wrong...
03-25-2007, 11:57 PM
#9
4th Gear Member
Join Date: Sep 2006
Location: TAXO
Posts: 1,803
RE: Exhaust decreasing gas mileage?
ORIGINAL: reelfast02cobra
This guy's also a retard. Jesus christ. How many noobs on this site?
ORIGINAL: 06mustang88
if anything, you should be getting better gas with the new exhaust. the new exhaust should be giving you better flow which makes the engine work less hard and burn less fuel. i would try to take the spark back to where it was before and see if the problem continues. that way you know if it's the exhaust or the spark that's decreasing your fuel economy
if anything, you should be getting better gas with the new exhaust. the new exhaust should be giving you better flow which makes the engine work less hard and burn less fuel. i would try to take the spark back to where it was before and see if the problem continues. that way you know if it's the exhaust or the spark that's decreasing your fuel economy
This guy's also a retard. Jesus christ. How many noobs on this site?
03-25-2007, 11:59 PM
#10
3rd Gear Member
Thread Starter
Join Date: Dec 2006
Location: Plymouth MA
Posts: 572
RE: Exhaust decreasing gas mileage?
well i had a fairly bad leak where the h pipe connects to the manifold on the driver's side. no matter how much i tightened it it still leaked horribly. . . so i caked on some high temp rtv silicone and i cant hear it anymore. . . we will have to see if that helps. . .