L-jet running rich Options

[Ctrout]

I know that everyone here has D-jet but does anyone know of any L-jet gurus anywhere? My car has smelled like it runs rich since I got it. While doing some exhaust work this morning, it was confirmed by the black soot everywhere. I thought I read somewhere that these cars ran rich from the showroom floor. I have backed the idle adjust all the way out with no apparent change in the richness of the mixture. It did change the RPM to a point though. I read in one thread something about coming in from working on the car and smelling like I had been standing next to a diesel campfire. That's me!

[scotty914]

okay the two screws are as follows:

idle screw is on the throttle body its about 1/2 inch in dia with a nice wide slot for a screw driver. what i recommend it that you pull the screw all the way out and use some carb cleaner to blast out the hole. it is not uncommon for oil to clog the passageway. what this screw does is allows air around the throttle plate.

the mixture screw in on the airflow meter on the top near the rear side right next to the air filter part. what it does is allows air to bypass the flapper in the meter. the l jet "knows" how much air in being pulled in by how far the flapper moves, but it is setup to run rich if the mixture screw is closed all the way. so basicly by letting some air by the flapper you can lean it out do to the brain not "seeing" that air. the screw is basicly a controlled vacumn leak, if you back it out ti will lean out the motor, if you screw it in you richen the motor. but the best thing you can to is check the plugs to find out which way you need to go.

if the car is running really rich you can check the cold start injector for leaks ( spraying when the motor is running but not cranking ) . it is located on the front of the plenum, and it is a pia to get out. the way it works is if it is cold out ( below 32 IIRC ) when you crank the motor it squirts gas in to the plenum to rich all the cylinders to help it start. it only squirts when the motor is very cold and the starter is cranking.

hope this helps