Adjust Gas and air mixture

[Jim Curnane]

Hi guys I think my car is running rich Im getting black smoke when we start it up can anyone tell me where the adjustments are we found 3 screws they look like there brass not far from the didtributor ????? Thanks Jim

[David T]

You are definitely running rich if you see black smoke! You cannot fix this by adjusting things. How long has the car been sitting? If it has been a while the plunger in the mixture unit is probably stuck. When you press down on the air sensor plate is there any resistance?
David Teitelbaum




Hi guys I think my car is running rich Im getting black smoke when we start it up can anyone tell me where the adjustments are we found 3 screws they look like there brass not far from the didtributor ????? Thanks Jim

[Bitsyncmaster]

You will need a dwell meter to test if your lambda is working and to adjust it if it needs it. Did you just buy the car? What is it's history?

[Farrar]

Might also be worth checking the spark timing.

[Bitsyncmaster]

Those three brass screws are not used for adjustment on our cars. They should be fully closed (turned clockwise).