flex fuel

  1. iboughtatahoe23

    91 octane vs e85 in flex fuel Tahoe/suburban?

    Which of these is better? I wanna save money of course but if 91 octane overall will increase longevity of the vehicle than by all means Idk if it matters but the winters are harsh and the summers are hot here.
  2. iboughtatahoe23

    How to change charcoal canister and evap?

    2014 Tahoe LT 176k miles. Every few dollars the pump will click sometimes. Seems to be worse in cold weather. Always has done it since I got it. Sometimes it does it. Sometimes it doesn’t. Sometimes I also smell gas when I first start it up in cold weather mostly. Than goes away pretty quick...
  3. A

    Idles rough coming to stop

    Just recently purchased a 2011 PPV, ran like crap when I got. So far I have replaced plugs and wires, new air filter and cleaned the throttle body. Runs a whole lot better now but when I am coming to a stop the RPMs drop below 500 and shudders a bit then levels off then the RPMs bounce around...
  4. iboughtatahoe23

    Is E85 in the winter bad?

    I’m reading that it can cause rougher idle and other symptoms in cold weather because it takes longer to vaporize? I’m thinking about switching back to 87 this winter. It’s already below 40 on the regular and it’s gonna get colder until It hits -40 with windchill this winter
  5. swathdiver

    Virtual or Reality?

    Was recently asked to do a comparison between what the engine computer shows as the alcohol content and by taking an actual sample of the onboard fuel from the fuel rail. Both vehicles have been driven less than 30 miles since refueling. The 2012 6.2 Sierra showed a virtual alcohol content of...

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