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

- - - - -

What's wrong? Have to hold throttle wide open to start hot engine?

  • Please log in to reply
2 replies to this topic

#1 Brettm57


    USMB Regular

  • Members
  • PipPipPip
  • 92 posts
  • Whitesville, NY

Posted 11 September 2003 - 07:46 AM

This is on a '90 Legacy. It starts fine when it's cold, but when it's hot you have to hold the throttle tight to the floor to get it to start. It seems to run fine once it starts though. Plus, the check engine light isn't on. I'm guessing maybe something with the MAF sensor? This is my daughter's car, and I'd like to get it straightened out so she isn't stranded somewhere. Thanks.

#2 frag


    Soob shade tree mechanic

  • Members
  • 1,777 posts
  • Montréal, Québec, Can.

Posted 11 September 2003 - 07:55 AM

Could be many things but your symptoms are in line with a coolant temp sensor malfunction.
The sensor send to the ECU the info that the engine is cold when in fact it is hot. The ECU sends to much gas and floods the engine (too rich a mixture).
That's why you can start with the pedal to the floor : you give the engine more air and that leans the mixture.
A possibility to investigate.
The fact that there's no CEL is strange though. When that happened to me (same symptoms) the CEL had been on for quite a while.

#3 Legacy777



  • Moderator
  • 12,810 posts
  • Houston, Tx

Posted 11 September 2003 - 07:00 PM

I'd agree with the coolant temp sensor diag.

You can get one for 20 bucks at libertysubaru www.newsubaru.com

you can pull the codes & do an active diag mode. Instructions on my site.

For the money, I'd probably just replace the temp sensor.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users