I changed the batery and the spark plugs on my 2003 trailblazer but now when I turn on the ac the rpm needle drops and the truck turns off. What can I do to solve this problem?
$4.00 fix Unhook the battery and clean the throttle body with throttle body cleaner, should be nice and shiny. When finished, hook battery back up and drive around for 5 miles or so with all accesories off so the computer can relearn a properly functioning throttle body.
The computer or PCM learned some bad habits with that dirty throttle body, so when you changed the battery, computer thought the TB was clean, and you'll have idle problems with the AC or defrost on.
Important note.....do not use carb cleaner or brake cleaner, will harm sensors, use sensor safe cleaner or one marked for throttle bodies. I just bought a can today for $3.99, I'm over due to clean mine as regular maintenence. We don't have a traditional PCV valve, so our throttle bodies get gunked up faster than others. Should clean once a year or more depending on driving habits.
If you can change our plugs, you can do this....dealer charges around $85-$100
May 27, 2011 |
2003 Chevrolet TrailBlazer