Search results

  1. C

    Slight miss but 6 mpg!!? Need help

    Depends. But turns out my ecm (computer) is bad. Ordered one. I’ll let ya know what happens.
  2. C

    Slight miss but 6 mpg!!? Need help

    Also new plugs and air filter and engine flush then fresh oil and filter. No change.
  3. C

    Slight miss but 6 mpg!!? Need help

    I put all new plugs and wires and coils. No change. I put new throttle body. No change. All new charcoal canister. No change. New purge valve and vent Solenoid and filter. No change. I sprayed starting fluid all around intake while running. No change. I’ll try the smoke test but I’m close to...
  4. C

    Slight miss but 6 mpg!!? Need help

    I’m doing the oil servicing this weekend. And plugs and wires and coils as well. Here’s some more O2 data.
  5. C

    Slight miss but 6 mpg!!? Need help

    No I totally understand. :) but at this point it’s so frustrating. There’s no shop here in Orlando I trust to take it to. I’d love to drop it off and have a proper diagnosis but I just don’t have a place. I think I watched every scanner scanner video he has to try and learn but it’s a lot to...
  6. C

    Slight miss but 6 mpg!!? Need help

  7. C

    Slight miss but 6 mpg!!? Need help

    My scanner is showing in red some values for the throttle position sensor. Position A and B. And absolute throttle position at 5.8% at idle.
  8. C

    Slight miss but 6 mpg!!? Need help

    They were on it when we got it about 4 years ago. Might be time to upgrade.
  9. C

    Slight miss but 6 mpg!!? Need help

    Fuel pressure is at 48 when at idle. 58 when off then turn key to on position
  10. C

    Slight miss but 6 mpg!!? Need help

    Yes cleaned Maf. Ordered new one. Yes that o2 goes from .1 to .9
  11. C

    Slight miss but 6 mpg!!? Need help

  12. C

    Slight miss but 6 mpg!!? Need help

  13. C

    Slight miss but 6 mpg!!? Need help

    Yes I have a decent scanner.
  14. C

    Slight miss but 6 mpg!!? Need help

    Yes. I have a decent scanner.
  15. C

    Slight miss but 6 mpg!!? Need help

    Hi guys thanks for the add to the group. I’m having a real hard time trying to figure out what’s wrong with my 2008 GMC Yukon XL 5.3 4 x 4. I have a slight miss but no codes. I replaced everything in the evap system. Purge valve. Charcoal canister. Vapor canister vent valve. (Pump at gas station...
  16. C

    Slight miss but 6 mpg!!? Need help

    Also not showing anything for the misfire data. 0 which seems odd since I can feel it when accelerating and while sitting at a light. But not all the time very intermittent.
  17. C

    Slight miss but 6 mpg!!? Need help

    Yes I have been taking my scanner with me on my landscaping route and watching the fuel trims. They look fine. My o2’s also look fine at about 750 to 850. I added a pic of something I don’t understand. The throttle position numbers in the red.
  18. C

    Slight miss but 6 mpg!!? Need help

    Hi guys thanks for the add to the group. I’m having a real hard time trying to figure out what’s wrong with my 2008 GMC Yukon XL 5.3 4 x 4. I have a slight miss but no codes. I replaced everything in the evap system. Purge valve. Charcoal canister. Vapor canister vent valve. (Pump at gas station...

Forum statistics

Threads
132,730
Posts
1,873,308
Members
97,559
Latest member
blanchard7684

Latest posts

Top