Skip to content
View in the app

A better way to browse. Learn more.

Ultimate Subaru Message Board

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Idle issue

Featured Replies

Ugh.....another problem, this is getting old. 90 leg 2.2 manual 364K miles.

 

so here is the issue, when stopped the car idles between 100rpm-900rpms. Up and down up and down. At one point it did die but started back up. No CEL

 

I have recently replaced Knock sensor, fuel filter, plugs, wires, and PCV.

 

Any thoughts...

  • Author
throttle position sensor

 

ya that is my next thought, but what to do, replace, adjust?

try adjusting first if that doesn't fix it than replace with one from a junk yard its like ten bucks. don't buy one new they are over $300 i just priced one. idle problems are usually oxygen sensors from my experience but it wouldn't hurt to try and adjust your tps.

I'm electrically challanged. So I swap the whole throttle body rather than the sensor.

Ugh.....another problem, this is getting old. 90 leg 2.2 manual 364K miles.

 

That is some impressive mileage...I'd be feeling my age @ 364K miles/22 years old too.

 

+1 on just replacing the whole TB.

 

Does it idle poorly when started cold - after sitting overnight? If so, it's not the 02 sensor, IMHO, as I've read they don't do anything 'til the car is in closed-loop and @ operating temp.

 

1. I'd clean out the IAC - don't use WD-40 or something that will leave a residue. I think brake cleaner is best?

POST on cleaning.

 

2. Also, clean the MAF sensor w/MAF-specific cleaner.

 

3. Coolant sensor, aka CTS - if it's giving faulty readings everything else the ECU controls will be messed up. Does it start OK when cold or crank more than usual?

 

4. O2 sensor

 

5. ECU could be bad...but unlikely.

 

6. Fuel pump

 

GL,

Td

Edited by wtdash

  • Author

ya she has put in the miles...here is another tid bit, it only idles like this once the engine has reached operating temperature.

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.