Mazda Protege This compact model offers an economical solution for the need for a sporty sedan or wagon.

HELP 2002 ES high idle - high $ dealer fix

Old 05-17-2006, 05:59 PM
Thread Starter
Join Date: May 2006
Posts: 1
Default HELP 2002 ES high idle - high $ dealer fix

Hi all

I'm new to the forum, and I'm doing this for my son.
2002 Protege, ES, standard transm.

At idle, idles around 3000 most of the time, but not always, engine hot or cold.
Dealer first reset something on the idler motor.....not sure if it temporarily fixed it or not, as soon out of the shop, back to the high idle.

Now back at dealers for thorough diaganosis, dealer says around $1500 to fix problem, ie., says throttle body, some controller and cable assembly needs to be replaced.

Does this sound legit to you guys............. Any suggestions?

Thanks, guys & gals........

Old 05-17-2006, 09:54 PM
Senior Member
Join Date: Jul 2005
Posts: 2,747
Default RE: HELP 2002 ES high idle - high $ dealer fix

Sounds like they do not know what it is either and are performing the "shotgun approach" by replacing anything that might be causing the problem. Throttle body w/ IAC valve, throttle cable, and probably cruise control actuator. There are really only two things that could cause a high idle like that at intermitent times. #1 The IAC or Idle Air Control valve sticking open, and #2 The throttle being mechanically held open by a sticking throttle valve, cable, or cruise control cable/actuator.
Am assuming that no codes have been set as you did not mention a CEL being on.

The first thing I would do is this. when the engine is idling at that 3000 rpm, locate the cruise control actuator. It is located at the passenger rear corner of the engine compartment. First pic below is it. Take off the vacuum hose indicated in pic and see if idle drops.
Next, locate the black flexible intake air boot between the air cleaner and engine. There is a solenoid and bracket mounted on the boot. Pull the whole thing up so is not attached and set aside. Now loosen the clamp for the intake boot at the throttle body and while it is still at 3000 quickly pull the boot away from the throttle body and push down. Engine will continue to run for several seconds so take a quick look at the gold colored throttle plate. It should be completely closed as in 2nd pic. 3rd shows a throttle open to roughly 3k rpm. Now that engine is stalled, cut a thin (1/2") wide piece of paper. Manually open the throttle valve, stick paper in at the bottom and allow valve to close. you should not be able to pull paper out. If all is still checking ok then here is last step.
Inside the throttle body bore and in front of the gold throttle plate there is an opening at the top that you should be able to feel quite easily or see with a small mirror. Cut yourself off a piece of duct tape that is large enough to completely cover this opening and stick it over the opening. Reinstall the intake boot and start up the engine.

Please tell me that at some point here the idle dropped!!!!!



Related Topics
Thread Starter
Last Post
General Tech
01-08-2015 04:27 PM
Mazda Protege
12-03-2012 12:52 AM
Hate/Love 5
03-23-2011 09:00 PM
Mazda 323,Mazda 626 & Mazda 929
08-05-2007 12:57 PM
Mazda Protege
06-04-2007 11:10 PM

Thread Tools
Search this Thread
Quick Reply: HELP 2002 ES high idle - high $ dealer fix

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.