Jump to content
Ultimate Subaru Message Board
rustybolts

83 brat lousy gas mileage

Recommended Posts

Possibly due to misfiring? Have you checked ignition components? I would pull the spark plugs and see if waht they look like, especially differences between cylinders.

Share this post


Link to post
Share on other sites
Possibly due to misfiring? Have you checked ignition components? I would pull the spark plugs and see if waht they look like, especially differences between cylinders.

Plugs all uniformly black idles fairly smooth plugs and wires new somehow seems carb dumping to much gas

Share this post


Link to post
Share on other sites

could be a bad jet or a bad needle and seat valve. Take the top of the carb off (SLOWLY... these damn things fly apart sometimes, then you're screwed :banana:) and have a look close to the float, there should be a little valve (screw-in?) between the chamber and where the fuel line reaches the carb.

 

This valve is designed to cut off the fuel flow into the carb if the fuel level in the chamber reaches a certain level, pushing the float up and closing the valve. However, if the valve has gunk in it, it won't close fully, so the pressure from the fuel pump will force fuel past the valve and up & out of the jet.

 

Take this valve out (Once again, carefully...) and either give it a good wash out, or replace it...

Share this post


Link to post
Share on other sites

Oh yes, and never ever ever ever turn a carb or sections of a carb upside-down to have a look at it....

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×