Get the latest advice about your car

Get Started
Advice » Q&A » 2002 Chevrolet Trailblazer

Q&A

Ask Your Question

2002 Chevrolet Trailblazer

Question: rpm drops

Question

fufu, Warsaw, NY, January 16, 2010, 09:10
Profile_thumbnail
 Rookie

I HAVE TRAILBLAZER WITH 90,000. MILES ON IT. JUST STARTED WHEN GOING DOWN HIGHWAY THE RPM DROP AND FEELS LIKE CAR MIGHT STALL. EVEN THOUGH MY FOOT IS ON ACCERLATOR.. IT LAST ABOUTY FIVE TO TEN SECOND AND COMES BACK UP WHERE ITS SUPPOSE TO BE. ALSO WHEN THE RPMS DROP THE ABS LIGHT COMES ON... ANY ITEAS WHAT MAY BE CAUSING THIS?

3 Answers
Answer It
Flag This

  • Answer #1

    Bret Bodas January 16, 2010, 10:43
    Profile_thumbnail
     Master

    Sounds like a possible fuel pump failing, but I would start by checking the fault codes in the engine control module, and check the fuel pressure.
    You may have an issue with the ABS, but the light may be coming on due to low idle speed. Have you had any battery issues lately?

    Flag This

  • Reply

    fufu, January 16, 2010, 11:23
    Profile_thumbnail
     Rookie

    had the fuel pump replaced not to long ago... no battery problems.. do you think it could be the throttle? needs to be cleaned?

    Flag This

  • Reply

    Bret Bodas, January 16, 2010, 11:31
    Profile_thumbnail
     Master

    A dirty throttle will cause idling problems, so it doesn't sound like your issue. Do you have the check engine light on? Any other warning lights?

    Flag This

  • Reply

    fufu, January 16, 2010, 11:35
    Profile_thumbnail
     Rookie

    yes the lights that says check engine will come on and off at times...

    Flag This

  • Reply

    fufu, January 16, 2010, 11:36
    Profile_thumbnail
     Rookie

    thats the only warning light thats comes on.. except when the rpm drop and the abs light comes on for a few seconds

    Flag This

  • Reply

    fufu, January 16, 2010, 11:37
    Profile_thumbnail
     Rookie

    thanks for your input.. on this i really appreciated it..

    Flag This

  • Reply

    Bret Bodas, January 16, 2010, 12:09
    Profile_thumbnail
     Master

    The next step is to get the diagnostic information from the engine control module, when the check engine light comes on, this info is stored and is needed to help diagnose this problem.
    If you can get the codes read out, and post them here I can give more info, you may be able to get this done for free at a parts store, just don't act on their recommendations.
    Thanks you for visiting RepairPal and for your appreciation, it means a lot!

    Reply
    Flag This

  • Answer #2

    ComputernerdBD February 24, 2010, 09:07
    Profile_thumbnail
     Rookie

    Change your fuel filter. That is probably what caused your first pump to fail. It will probably make your second pump fail as well if it clogs. Also try Lucas Upper Cylinder Lubricant to clean your fuel injectors.

    Reply
    Flag This

  • Answer #3

    Visitor, October 27, 2010, 16:30

    possibly your catalytic converter is plugged

    Reply
    Flag This
Related Items:
  • Car starts but kills when rpm drops too low
    My battery died, so I bought a new one. Put the new one in, everything is screwed in tight, but now when I start the car it doesn't rev up all the way. It starts with really low rpm, and you pretty...

    Q&A > Chevrolet > 2003 Chevrolet Trailblazer

Answer Ranks

This week's top 10

1 globalhelper 6 Autohaus Lake Norman
2 milesauto 7 obdcar
3 csubak30 8 TimGoodreau
4 Diagnostechs Mobile Service 9 raiderron
5 jose8889 10 Camster