AFM Adjust/Emissions Failure

[Scott R]

Hey guys! Well I failed my emissions test today with high CO. State limit is 20 I blew a 40.30. So I need to get the CO down. I will replace the O2 sensor, and then I will also surely need to adjust the AFM. So, the service manual states that leaner is "Anticolockwise." Is standing in front of the car or looking from the passenger compartment? I guess I mean to ask, is it screw out for lean or screw in?

87 951.

[mlue]

If the AFM screw was never messed with replacing the O2 sensor is probably all you have to do. The screw only changes the mixture at idle.

Screw in - richer
Screw out - leaner

How is the CAT? With a rich or slightly rich mixture there should be a little sulfer or rotten egg smell when the car is driven hard.

Mark
'86 944NA

[This message has been edited by mlue (edited 09-28-2001).]

[Scott R]

Yes it has been messed with. The cover has been drilled. Any rule of thumb on how many turns is normal?

[Britwrench]

Checked the air filter?

[mlue]

Check out this Post:

http://www.pelicanparts.com/ultimate/Forum5/HTML/004383.html

I had to adjust my screw because the PO had messed with it as well. It may not be perfect but its in the ball park.

Mark
'86 944NA