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
- - - - -

Starts hard, runs rough, ECS lite on, runs great


  • Please log in to reply
8 replies to this topic

#1 oldude

oldude

    USMB Regular

  • Members
  • PipPipPip
  • 50 posts
  • New England

Posted 01 January 2008 - 02:39 PM

An 83 GL EA81 Sta. Wag. Automatic

So this has got me a bit confused. First start of the day is really tough. Changed to manual choke, which helped at first. But now it is taking longer and longer to start when cold. Once started, it runs a bit rough, as if it is missing. Then when it warms up a bit AND ECS light comes on, it runs smooth. No missing, decent power, ( for a subie engine)

Plugs new, Wires, new exhaust from Cat back. (Problem was happening even before new exhaust.

This just seems backwards to me. I'd have thought that it would run worse when ECS light came on.

Any ideas? Hope the New Year is good to y'all. Thanks

#2 [HTi]Johnson

[HTi]Johnson

    Head Trauma, inc.

  • Members
  • 1,512 posts
  • Coburg, Or.

Posted 01 January 2008 - 02:53 PM

I'm not too familar with how the EA81 works, with the vacuum controls, that only help the car with a cold start...I'm drawing a blank. (Had a rough new year's.:drunk:) I'd suggest checking the vacuum lines to everything. Sorry for the lack of help.

#3 subiemech85

subiemech85

    SIX STAR SERVICE

  • Members
  • 2,710 posts
  • down by the river

Posted 01 January 2008 - 02:59 PM

unplug the computer and drive it

#4 oldude

oldude

    USMB Regular

  • Members
  • PipPipPip
  • 50 posts
  • New England

Posted 01 January 2008 - 03:01 PM

unplug the computer and drive it


So are you saying computer may be bad? I have another one.

#5 subiemech85

subiemech85

    SIX STAR SERVICE

  • Members
  • 2,710 posts
  • down by the river

Posted 01 January 2008 - 03:02 PM

the computer is not necessary

unplug and drive

see how it does

#6 Qman

Qman

    Happiness is... no lag!!

  • Moderator
  • 11,119 posts
  • Sumner

Posted 01 January 2008 - 10:53 PM

Sounds like a temp sensor. The computer is for the feed-back carb. Fix the problem. Check the codes for other issues as well.

#7 GeneralDisorder

GeneralDisorder

    Elite Master of the Subaru

  • Members
  • 20,280 posts
  • Portland

Posted 02 January 2008 - 07:35 PM

The computer isn't bad - it just can't compensate for a poorly functioning sensor. Once it realizes that this sensor is out of spec, it ignores the input from it and runs in "limp mode".

I agree that you are probably looking at a temp sensor. They are around $35 to $50 depending on where you get one.

Check the codes first to determine the exact problem.

GD

#8 oldude

oldude

    USMB Regular

  • Members
  • PipPipPip
  • 50 posts
  • New England

Posted 06 January 2008 - 12:19 PM

Thanks for the input. I will check out the codes, and if I can find my book maybe then I'll find the temp sensor.

#9 NV Zeno

NV Zeno

    Elite Master of the Subaru

  • Members
  • 3,036 posts
  • Ponderosa Ranch, Nevada

Posted 06 January 2008 - 05:12 PM

Sounds like a temp sensor. The computer is for the feed-back carb. Fix the problem. Check the codes for other issues as well.


Yep, the same thing happened with my '83. Turned out to be the "coolant temperature sensor", which is not to be confused with the sensor that's plugged into the radiator. Can't remember where it's located on the engine (it was probably 150,000 miles ago), but IIRC it was an easy fix.

I concur with Ken.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users