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

- - - - -

Quick answer needed - EA81 w/ Weber stumble/miss

  • Please log in to reply
5 replies to this topic

#1 Ever Victorious

Ever Victorious

    Hazard to himself

  • Members
  • 883 posts
  • Everett

Posted 14 February 2010 - 12:47 PM

I need a fast "save your bacon" answer here, and I need it in 2 hours or less... :eek:

'82 BRAT... EA 81 with Weber carb.

When it's cold, it stumbles/misfires like hell from 1750-2750 RPM, then gets better at about 3k, and flawless at 4k RPM.

Once warmed up, there is no stumble at all if the throttle is applied gently... but if I ask for power, it still stumbles/misfires from 2250-2750 (but not quite as bad as before), then not as bad from 3k-4k, then flawless...

It was running great before I put it in the garage for the winter. I've tried carb cleaner and new fuel with no effect. Quick ideas as to what's wrong?

#2 naru


    1000+ Super USER!

  • Members
  • 2,301 posts
  • under the bridge

Posted 14 February 2010 - 01:17 PM

Lotsa possibilities.

I would start by examining the ignition system.
Moisture under the disty cap or on the coil,fouled plugs,bad wires etc.

Fuel-wise,-make sure the accellerator pump works,could be lean from fuel delivery problems too(low float level,plugged filter etc.)

#3 GeneralDisorder


    Elite Master of the Subaru

  • Members
  • 22,052 posts
  • Portland

Posted 14 February 2010 - 01:30 PM

One simple thing - since it's related to temp - check that the choke is closed when it's cold and that there is power to it, it's openeing as the engine runs, fully open when at running temp, etc.

Pull out the secondary idle jet and inspect the hole in the tip of it - you may not have a secondary idle jet but often the Weber's do. It is used to assist in progression from primary to secondary - which could be part of your problem at mid-throttle. It's a quick check.

After that all the ignition components should be checked for sure. Cap, rotor, plugs and wires. Clean and regap the plugs and see how it runs if you can't replace them all right now.


#4 Ever Victorious

Ever Victorious

    Hazard to himself

  • Members
  • 883 posts
  • Everett

Posted 14 February 2010 - 02:56 PM

Thanks guys... just got it fixed in time. :)

The plugs were borked. Replaced 'em and it runs perfect! :banana:



    I think i can break that.

  • Members
  • 366 posts
  • Oregon

Posted 14 February 2010 - 11:19 PM

i love how rock solid and simple weber's are, easy to pass the problem onto somthing else.

#6 edrach


    RIP 6/28/14

  • Members
  • 12,326 posts
  • Bothell, WA

Posted 15 February 2010 - 09:19 AM

It's not cold enough this winter in our area, but the weber will ice over badly when it is really cold. Glad you got it fixed quickly.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users