Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

High Idle


  • Please log in to reply
4 replies to this topic

#1 GREENSUBIE

GREENSUBIE

    Oh the Possibilities

  • Members
  • PipPipPip
  • 104 posts
  • Kelso

Posted 21 April 2009 - 01:45 AM

I just did a spfi swap on my 86 hatch, runs great except for when i stop at a red light or stop sign ect... the rpms rise to about 2800 rpms and holds till i take off. and then runs fine and when i stop same thing. its very frusterating cuz i cant afford it to be burning gas like that. and i dont know much bout spfi, ive checked: for vaccum leaks there are none, timing is good, and idk what to do



Thanks
SS

#2 Twitch de la Brat

Twitch de la Brat

    Village Psycho

  • Members
  • 1,533 posts
  • The Athol of Idaho

Posted 21 April 2009 - 02:27 AM

If its a spfi (single point fuel injection aka throttle body injected), try cleaning
the throttle body.
That can get pretty messed up with grease and grime.
Also check for vacuum leaks with a spray bottle of soapy water.
If you have a leak you may be able to get bubbles to show up on the offending
hose.
If its mpfi (multi port fuel injected) I would look into having it scoped by a
certified tech.
And do a vacuum leak test before you take it to a tech.

Twitch

#3 silverhelme

silverhelme

    USMB is life!

  • Members
  • 178 posts
  • Republic, WA

Posted 21 April 2009 - 12:16 PM

Check the coolant temp sender. Mine had a similar problem since it was installed. Unplug it and see if it returns to normal idle if it does find a replacement. As an afterthought is your gas mileage not quite what you expect? If not that is probably the culprit barring vac leaks.

#4 GREENSUBIE

GREENSUBIE

    Oh the Possibilities

  • Members
  • PipPipPip
  • 104 posts
  • Kelso

Posted 21 April 2009 - 02:48 PM

Check the coolant temp sender. Mine had a similar problem since it was installed. Unplug it and see if it returns to normal idle if it does find a replacement. As an afterthought is your gas mileage not quite what you expect? If not that is probably the culprit barring vac leaks.



Well i filled the gas tank to see my new mileage and so far its getting pretty good, with this high idle thing, so im expecting a little better after i figure out the idle problem, but ill check the coolant temp sender. thanks

SS

#5 GREENSUBIE

GREENSUBIE

    Oh the Possibilities

  • Members
  • PipPipPip
  • 104 posts
  • Kelso

Posted 22 April 2009 - 04:29 PM

The temp sensor was the problem.

Much Thanks
SS




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users