I have been getting really bad mileage in the realm of 9-12mpg on a 1991 N/A. I'm doing a 60K tune up and just changed the plugs and wires. Here are the pictures of the plugs, do they look normal? Possibly running rich?

Thanks for any advice/help, -Lukas.

Front Leading


Front Trailing


Rear Leading


Rear Trailing

 

Little bit of ash build-up, but otherwise they look ok to me.

 

good description for plug wear

http://www.gnttype.org/techarea/engine/plugs.html

 

Burn is fine, but those things have been in there for a long time!


-Ted

 

Your burn does seems to be in the ball park. They are a little to warn to keep though. I would check other areas. Click on the link in my Sig below.