Ok so I got a 94 integra with 202,000 miles, prettty much the only thing I have done is a intake,header,exhaust. The intake and header are off brand and I still have the stock exhaust I just have a different muffler on it. Most all of this I got done last december and Ive never had a problem with the car, but just recently I realized my gas mileage has started to drop little by little. Im not really really sure whats the problem I almost want to say its the larger header going to the stock exhaust and its not lettin enough exhaust get out. but Im not really sure.

 

What mpg are you averaging ?
Is your check engine light on ?

 

not sure im like barely passing 200miles on a full tank tho and my check engine light came on tonight thats why I posted this but Im do for a oil change which is why I think it came on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 19integra94 &raquo;</TD></TR><TR><TD CLASS="quote">not sure im like barely passing 200miles on a full tank tho and my check engine light came on tonight thats why I posted this but Im do for a oil change which is why I think it came on.</TD></TR></TABLE>

Pull the code and see what's kicking the light..

Needing an oil change isn't going to throw a code.. however the maint required light will come on.. which can easily be reset..

As far as the horrible gas mileage.. I'd start with

- Running some fuel injector cleaner or seafoam
- Pull your O2 sensor and check the condition of it.. this could likely be the cause..
- Replace fuel filter..

Pretty much do all routine maintenance and see if that helps with the MPG.

 

I had I/H/E. By removing only my exhaust and intake, i went from getting 260/tank to 320/tank. I was amazed by how much of a difference it made. Both comparisons were made with the same driving habits.

 

i have a 1998 Gsr integra 4 door, and it has I,H.E and im getting around 25-29 mpg..

im not sure what im spose too get but thats pretty good in my book

 

25 - 30 is good.