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

Mazda protege jumping rpm.

  #1  
Old 05-14-2019, 02:26 PM
Junior Member
Thread Starter
Join Date: May 2019
Location: cincinnati
Posts: 4
Default Mazda protege jumping rpm.

When I start my 98 protege it will idle anlil high at first then all the sudden the rpm drops and jumps and drops and jumps. I need to know where to start to get this problem fixed.
 
  #2  
Old 05-15-2019, 11:44 AM
Junior Member
Join Date: Apr 2019
Location: Alabama
Posts: 19
Default

Idle Air Control (IAC) motor. It's located right behind the throttle body and it controls the idle when you lift off the accelerator. I cleaned mine for the second time(in 220,000 miles) a few days ago. They get gunked up over time and you'll need a can of cleaner(take it off and spray it off and it'll be fine. Don't buy a new one they're a couple hundred bucks. Bad news is the IAC motor is held on with some weird spec Japanese #2 Phillips and US is slightly smaller. I changed mine out to Allen head cap screws, much easier to remove the next time. Good luck!
 
  #3  
Old 05-15-2019, 03:06 PM
Junior Member
Thread Starter
Join Date: May 2019
Location: cincinnati
Posts: 4
Default

Originally Posted by depmike38 View Post
Idle Air Control (IAC) motor. It's located right behind the throttle body and it controls the idle when you lift off the accelerator. I cleaned mine for the second time(in 220,000 miles) a few days ago. They get gunked up over time and you'll need a can of cleaner(take it off and spray it off and it'll be fine. Don't buy a new one they're a couple hundred bucks. Bad news is the IAC motor is held on with some weird spec Japanese #2 Phillips and US is slightly smaller. I changed mine out to Allen head cap screws, much easier to remove the next time. Good luck!

My mechanic says it doesnt have one
 
  #4  
Old 05-16-2019, 08:21 AM
Junior Member
Join Date: Apr 2019
Location: Alabama
Posts: 19
Default

Yours is either a 1.5 or a 1.8 & they both have one. The 1.5 style is like the one on a 99-03 2.0 liter. It's held down by those 4 weird phillips screws and has a hose and an electric connector. The 1.8 has an electric connector only I believe. Either one is right at the throttle body.
 
  #5  
Old 05-16-2019, 08:45 AM
Junior Member
Thread Starter
Join Date: May 2019
Location: cincinnati
Posts: 4
Default

Originally Posted by depmike38 View Post
Yours is either a 1.5 or a 1.8 & they both have one. The 1.5 style is like the one on a 99-03 2.0 liter. It's held down by those 4 weird phillips screws and has a hose and an electric connector. The 1.8 has an electric connector only I believe. Either one is right at the throttle body.

Ok so I took off the throttle body and found it. I canít get it off !!!!! Fml.
 
  #6  
Old 05-16-2019, 10:26 AM
Junior Member
Thread Starter
Join Date: May 2019
Location: cincinnati
Posts: 4
Default

Originally Posted by John Snyder View Post
Ok so I took off the throttle body and found it. I canít get it off !!!!! Fml.

Ok so i took the whole throttle body off. I still canít get them f^%*#*%#. Screes out. Even used a back out kit. Someone already tried this once. They were half stripped already. Iím so mad. Lol
 
  #7  
Old 05-16-2019, 02:01 PM
Junior Member
Join Date: Apr 2019
Location: Alabama
Posts: 19
Default

Take a sharp chisel and tap a cut for a flat screwdriver. Sometimes the tapping on the chisel even loosens the threads. I also have had luck with a small pair of needle nose channel locks. Replace them with allen head cap screws and washers. The size if it's exactly the same as my 2.0 liter is 5mm x .08 x 16mm. At least after this it's easy to do.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Buck Mulligan
Mazda5
2
06-27-2017 08:28 PM
wayne Sangwell
General Tech
2
03-13-2015 07:39 PM
mathos
Mazda2
2
11-10-2014 12:06 PM
mattpharding
Mazda6
5
07-01-2013 08:33 AM
FBPARENT
Mazda MPV
1
07-18-2006 09:47 PM


Thread Tools
Search this Thread
Quick Reply: Mazda protege jumping rpm.


Advertising
Featured Sponsors
Vendor Directory

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 Amazon.com and affiliated sites.