how to adjuste co2 mixture

technowolf · Post by **technowolf** » Thu Jul 14, 2005 10:11 pm

Hi guys,

trying to tune my 1985 cab but dont know how to adjust mixture...

does anyone know the procedure to adjust idle mixture screw????

thanks

Al

Post by **SoCal_Cabby** » Fri Jul 15, 2005 12:38 am

may i ask why you need to adjust the CO2?

did you fail smog?

sixsracing · Post by **sixsracing** » Fri Jul 15, 2005 10:44 am

Without an emissions tester it's all guess work.

What do the plugs look like:
color?
deposits?

Is the ECU matching voltage with the O2 sensor?

We can help, but SoCal is right in asking why you feel the need to adjust the CO.

technowolf · Post by **technowolf** » Sat Jul 16, 2005 1:18 pm

no ecu this is cis
The guy who had this car foulded around whit the screw trying to make it start..........I got the car to start but but I feel it is running rich..dark smoke...

sixsracing · Post by **sixsracing** » Mon Jul 18, 2005 10:42 am

Turn the screw an 1/8th of a turn to the left and drive a mile or two. Stop and repeat process until you feel the car is performing the way you want it to. Then drive 25 or so miles and pull the plugs. They should all look tan to light brown. White or gray is too lean and you need to turn the screw back to the right.. If they are still black then you need to continue turning the screw to the left.

Left=lean

Right=rich

technowolf · Post by **technowolf** » Sun Jul 24, 2005 9:18 am

ok
thanks for advice...