anyone elses gas mileage go down after installing off road pipe

[abouttobeglue]

my gas mileage has gone down about 2-3mpg since i put on my prochamber, i dont have mils yet and the cel is on, anyone else have this problem

 

[Kilgore Trout]

gas mileage? wat dat?

 

[9646gt]

those rear o2 sensors dont affect the AF ratio at all..only monitor emmissions so that is most likely not the problem..maybe a leak could contribute to it..mine already had an o/r midpipe so I cant help much..maybe you are gassing it more to hear the sound? hehe jk

 

[iStang]

less low end torque, so you are gassing more? Just and idea

 

[lgndracer]

gas mileage? wat dat?

My thoughts exactly!

You want to know about gas milage, my daily driver is a V10 gas Excursion. With the current gas prices I'm payin' about $105 to fill it up!

Not really sure what the Mustang gets, I've never calculated it. But I would guess about 16?

 

[TMaC]

I lost about the same when I put an O/R pipe on my 5.0 a few years ago.

 

[Superhereaux]

mine stayed the same after i installed my prochamber, around 19




went down the first couple of weeks i had it on though

 

[Seraphitia102]

i get 15-16mpg with the stock exhaust

 

[Mychael101]

Man I just filled up today and average 25mpg. Gotta get my car tuned soon now that I hvae my LT's in! Good thing is that my mileage hasn't changed a bit.

 

[iStang]

Man I just filled up today and average 25mpg. Gotta get my car tuned soon now that I hvae my LT's in! Good thing is that my mileage hasn't changed a bit.

lol something is wrong with your car, take it to the shop lol


Igndracer: What's the #39 in your sig. Do you have an anniversary model?

 

[Skidzz]

those rear o2 sensors dont affect the AF ratio at all..only monitor emmissions so that is most likely not the problem..maybe a leak could contribute to it..mine already had an o/r midpipe so I cant help much..maybe you are gassing it more to hear the sound? hehe jk

I'm not so sure about that. When my check engine light was coming on because of my EGR valve, i got worse mileage when the light was on, about 235 mile per tank. But the light would go on and off all the time. When it was off i got about 265 miles per tank. Now that i cleaned the egr out and the light is off for good i get about 280 mph. Then again, the egr has to do with a/f i believe, so that could be the reason. Im just thinking maybe the extra airflow is causing his ecu to add fuel to the mixture. I mean im not trying to argue, im not an expert, just askin.....

 

[COramprat]

Try reseting the computer (disconnect the battery for 30 minutes) to see if it helps. Nearly every computer or electrical related problem I've had staightens out with a computer reset.

 

[mity2]

i never thoguth about gas milege, but i think mine is tad bit lower since i got o/r mid pipe

 

[Pughman]

i get 23 ?

 

[lgndracer]

Igndracer: What's the #39 in your sig. Do you have an anniversary model?

All Saleens are numbered. Mine is number 39 in 2003.

 

[Stang|ess]

i get 15-16mpg with the stock exhaust

Damn you must go WOT at every stoplight.

I get about 22-23ish.

 

[Orions98GT]

I average 22.5 all the time.

 

[HoustonGT]

Prolly went down cuz now you subconciously give it more gas just to hear the new exhaust sound

 

[mity2]

damn you guys got good milege. I think i get about 20mpg avg...

 

[UhadMEatGT]

Anything that deals with your emissions can cause your mileage to go down.