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HELLPPP!!! 15 mpg

G

gotboost3

New member
so my avg mpg is 15.5 wtf is that im only ruuning intake and headers and colder plugs gapped at .55 could having colder plugs and a smaller gap ccause this small of a increase in fuel consumption???
 
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Re: 15 mpg

you shouldnt be running colder plugs on a stock car anyway, but it sounds like more than that. like an o2 sensor or something of the like.
 
Re: 15 mpg

i just replaced the narrow band o2 and im catless so the 2nd one is unplugged....i remote start my car alot and it sits and idles could that be it because my aeroforce reads an average mpg of 21
 
Re: 15 mpg

i also with the aeroforce accidently reset my fuel trim....would that mess anything up? i also accidently ended up stuck doing a case learn awhile back because i selected it lemme know if either of those could be the culprit...
 


my car reads 15ish on the DIC alot, but i think its just because i start my car up every mrning and idle it for 15 minutes before driving.
 
So....How long does an o2 Sensor usually last or should I ask how do you know it's bad without scanning?
I have a replacement front o2 that I have thought about changing since the original is about 6 years old but I dont know if it needs it or not as I'm pretty much stock.
 


yeah i figured it was the remote start and idleing kills MPG's weird thing is i plugged the rear o2 back up and tucked it away and i now have no ses light and i gained a few mpg's
 
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