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BAAD gas mileage in my Tahoe: What gives?!

This is a discussion on BAAD gas mileage in my Tahoe: What gives?! within the Technical / Maintenance forums, part of the General Discussion category; I'm seriously like getting MAYBE 10mpg and I'm EASY on driving it. Does not having a front valence hurt me ...

  1. #1
    has no car payment! TIMSPEED's Avatar
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    BAAD gas mileage in my Tahoe: What gives?!


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    I'm seriously like getting MAYBE 10mpg and I'm EASY on driving it.
    Does not having a front valence hurt me THAT badly?
    My mods/specs are in my sig.
    Engine runs great, no SES codes...however I'm thinking my Oxygen Sensor could be going bad, because every so often driving a steady 65mph on the freeway I will get a SES Code 32 (EGR Valve) However the EGR Valve & Solenoid & Vacuum lines are all BRAND NEW and the passages are nice and clean.
    So I'm thinking maybe since the only way it knows the EGR valve isn't working right, is the Oxygen Sensor is reporting erraneous information (reading too rich I imagine)
    What say yall?
    -87 Corvette Z52 Coupe
    *K&N Filter,Yank Torque Converter,Custom Cat-Back
    -95 Tahoe 2-door 4x4
    *Posi-Lok/G80, 285's, Custom Cat-Back, 3.73's
    -96 S10 ECSB V6
    *ZQ8 Rims, 3" BellTech Drop, Dynomax Cat-Back

  2. #2
    Tbi-MAX
    Guest

    Re: BAAD gas mileage in my Tahoe: What gives?!

    Quote Originally Posted by TIMSPEED
    I'm seriously like getting MAYBE 10mpg and I'm EASY on driving it.
    Does not having a front valence hurt me THAT badly?
    My mods/specs are in my sig.
    Engine runs great, no SES codes...however I'm thinking my Oxygen Sensor could be going bad, because every so often driving a steady 65mph on the freeway I will get a SES Code 32 (EGR Valve) However the EGR Valve & Solenoid & Vacuum lines are all BRAND NEW and the passages are nice and clean.
    So I'm thinking maybe since the only way it knows the EGR valve isn't working right, is the Oxygen Sensor is reporting erraneous information (reading too rich I imagine)
    What say yall?

    good job on replacing it, now replace the 02!
    mine did this exact thing with code 32, change the 02 1st, mileage got better (70%) and the egr valve the other (30%) of my bad mileage...

    seems like they seem to die together, but replacing both at the same time, got my poor mileage from 10 back to 18-20 average.

    no idea what it will be when my stroker 383 gets finished....

  3. #3
    has no car payment! TIMSPEED's Avatar
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    Re: BAAD gas mileage in my Tahoe: What gives?!

    Quote Originally Posted by Tbi-MAX
    good job on replacing it, now replace the 02!
    mine did this exact thing with code 32, change the 02 1st, mileage got better (70%) and the egr valve the other (30%) of my bad mileage..seems like they seem to die together, but replacing both at the same time, got my poor mileage from 10 back to 18-20 average.
    Argggh...that's what I figured...even though that damn heated Oxygen Sensor is ~$100
    Ohh well, at $3 a gallon, it'll pay for itself shortly.
    -87 Corvette Z52 Coupe
    *K&N Filter,Yank Torque Converter,Custom Cat-Back
    -95 Tahoe 2-door 4x4
    *Posi-Lok/G80, 285's, Custom Cat-Back, 3.73's
    -96 S10 ECSB V6
    *ZQ8 Rims, 3" BellTech Drop, Dynomax Cat-Back

  4. #4
    ......................... Atomic's Avatar
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    Re: BAAD gas mileage in my Tahoe: What gives?!

    Itll pay for itself in 4 - 5 full tanks assuming thats the problem

 

 

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