o/r pipe = poor gas milage

jtb19nh

Member

Jul 9, 2005

156

0

17

Aug 23, 2006

#1

• Aug 23, 2006

• #1

anyone else have this happen to them after installing a o/r pipe?

 

gcomfx.com

Founding Member

Oct 22, 2002

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56

Republic, MO

Aug 23, 2006

#2

• Aug 23, 2006

• #2

Same O2 sensors or new ones?

 

Stanger007

Founding Member

Sep 26, 2001

2,015

2

46

Baton Rouge, LA

Aug 23, 2006

#3

• Aug 23, 2006

• #3

I got a touch better mileage when I installed my exhaust setup (LT, Prochamber, catback)

 

jtb19nh

Member

Jul 9, 2005

156

0

17

Aug 23, 2006

#4

• Aug 23, 2006

• #4

i used brand new o2's

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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129

Aug 23, 2006

#5

• Aug 23, 2006

• #5

It should not have hurt milage. Was anything else done at the same time? Were both O2 harnesses reconnected?

Good luck.

 

jtb19nh

Member

Jul 9, 2005

156

0

17

Aug 23, 2006

#6

• Aug 23, 2006

• #6

i did the headers at the same time and the smog delete. Yes both harness are connected

 

18mustangs

New Member

Jun 8, 2005

533

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Virginia Beach, VA

Aug 23, 2006

#7

• Aug 23, 2006

• #7

Stanger007 said:

I got a touch better mileage when I installed my exhaust setup (LT, Prochamber, catback)

Click to expand...

Me too. I think less restriction would equal better scavenging and better efficiency.

 

87_GT

Member

Sep 14, 2004

179

2

18

tinley park, illinois

Aug 23, 2006

#8

• Aug 23, 2006

• #8

+1 i also got better gas mileage

 

JJ95GTID

Active Member

Sep 22, 2003

1,141

4

49

Phoenix, AZ

Aug 24, 2006

#9

• Aug 24, 2006

• #9

jtb19nh said:

i did the headers at the same time and the smog delete. Yes both harness are connected

Click to expand...

Believe it or not removing the smog (air pump) may have hurt your mileage. I say this because your car starts up with a richened A/F until your O2 sensors heat up. Might have something to do with it. Did you remove the EGR stuff too?

Maybe it just you like the new sound soo much you are having trouble with your foot in throttle adjustment

:SNSign:

 

MI95Cobra

New Member

Aug 20, 2006

451

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Oklahoma City

Aug 24, 2006

#10

• Aug 24, 2006

• #10

what kind of headers?????

 

94-302-vert

Active Member

Aug 16, 2004

1,947

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36

NE CT

Aug 24, 2006

#11

• Aug 24, 2006

• #11

Stock gears?

I lost some low end when I did mine. noticed no dif in MPG tho.

But with stock highway gears loss of lowend will mean more throttle all the time...

 

jtb19nh

Member

Jul 9, 2005

156

0

17

Aug 24, 2006

#12

• Aug 24, 2006

• #12

i used bbk headers. and no i did not remove any egr stuff. do you think i would get better milage if i put the smog pump back on?

 

4Jenna

Founding Member

Sep 12, 2001

4,326

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69

AZ

Aug 24, 2006

#13

• Aug 24, 2006

• #13

Welcome to the aftermarket world...haha

 

Mrgreen94gt

SIMMA DA NA!!!

Founding Member

Jul 16, 2002

448

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0

West TN

Aug 24, 2006

#14

• Aug 24, 2006

• #14

There was no change in mileage for me, probably because my factory mid-pipe was practically new. Didn't feel any stronger either.

However, I did have a pinging problem during the time that I had the O/R H, which surprisingly went away when I swapped to my current catted X.

 

TheDamned

"I am Canadian and Damned for it!"

Jul 22, 2003

457

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48

Montréal, Québec, Canada

Aug 24, 2006

#15

• Aug 24, 2006

• #15

eades5.0 said:

Welcome to the aftermarket world...haha

Click to expand...

so true

 

mo_dingo

20+ Year Stangneter

Aug 26, 2003

3,031

2

58

Tucson, AZ

Aug 24, 2006

#16

• Aug 24, 2006

• #16

Did you reset the computer when you put the new O2 sensors in? If not, then you should anytime you replace any sensor. The comp needs to learn the new sensor.
Scott