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throttle body clean

  1. Engine Light and Reduced Engine Power after tune up

    OEM Issues
    hello all new to the forums today! i need your guys help today i changed my air filter, fuel filter oil, filter, spark plugs. and cleaned my throttle body i took it off and moved the plate a lot i held it open with my finger and cleaned all inside now i know that that is bad. i buttoned the car...
  2. Rpms rev up during shifting

    OEM Issues
    I have a 2005 Trailblazer LT 4x4 with the 4.2 I6. 158k miles Wife recently noticed (2-3 days ago) that the rpms have been fluctuating higher during shifting. I drove last night and confirmed. 35mph- 2500 starting rpms, shifts and goes up to 3000—3500 for a quick second and then settles back to...
  3. ac issues..throttle body is CLEAN.. HELP PLEASE

    hey guys, newbie here. fixing start pulling my hair out on this trailblazer. having ac issues. first had cool air out pass side and slightly warmer air out driver and rear. now , at idle only when ac or heater turned on, from 600 to 300 and quick surge back up. i noticed it does the "stall" when...
  4. 2003 Trailblazer: rough running engine and random misfires

    Hello all! I’m hoping some of you can help shed some light on my issue… The water pump on my 2003 TB 4.2L 4WD (145k mi.) developed a leak, so we changed it out and at the same time changed the serpentine belt. When we got it back up and running again, it was running slightly rough and would...
  5. [SOLVED] SES light on after Throttle Body Cleaning

    I hope I'm posting in the right place, it's my first time. So I changed my spark plugs today and started up the truck and no SES light. I decided to clean the TB since I was having a rough idle issue. I followed the instructions in the DIY section and they were very helpful. Anyway, after I...
  6. Cleaned Throttle body MPG dropped?????

    I've searched all over this site to find a similar situation or cause, to no avail. I just cleaned my very dirty throttle body and now it seems my MPG dropped by at least 2 MPG. I was getting over 17 MPG and now I'm getting 15MPG combined. After the throttle body cleaning I also put new plugs...