Gas mileage?

[SloZ71Hoe]

what the heck... every since i added my headers, exhuast, and cai my tahoe has got some really ****** gas mileage? I get around 230-250 a tank now when i used to get over 320... What the heck went wrong lol

 

[DallasD]

Bad tune maybe or your o2 sensors might be dirty and need replacing from the o/r y pipe and headers.

 

[BlackDenali]

what the heck... every since i added my headers, exhuast, and cai my tahoe has got some really ****** gas mileage? I get around 230-250 a tank now when i used to get over 320... What the heck went wrong lol

Keep your foot out of it!!!!!

 

[OKLAGMCRUISER]

have your cats checked for clogging.

 

[Donkey Punch]

I think he deleted them pesky gatos

 

[SloZ71Hoe]

haha i do keep my foot out of it now. Cuz i thought that was why it was so horrible. But its still pretty ****** to me.

I havent even messed with the tune any. Its still stock just with some rev limiter changes, and my speedo is corrected for my tires. I havent jacked with anything else in the tune.

Oh, and i dont have cats anymore.

i went to dallas and back and was getting 12.9 and 13.1 on the high way. Seems pretty crappy to me. In town is really bad.

 

[DallasD]

Air to fuel ratio could be all screwed up and the poor mileage could be a result of that. Or the O2 sensors could be bad or if you took them out and didnt turn the off with the tuner that could be your problem.

 

[SloZ71Hoe]

thats kinda what im thinking but didnt want to mess with it due to not havin a guage to see what it is. Also i pulled the rear o2s out and they are turned off...

 

[jomulk56]

I'd say the air/fuel ratio, and tune.

 

[DallasD]

I'd say the air/fuel ratio, and tune.

This sounds about right.