After adjusting the timing on my 1988 Mitsubishi Mighty Max (engine swap to a 1991 or 1992), and readjusting the Idle Speed Control Servo to lower the idle speed, I thought I was all good to go with smog.
However, at the appointment today the referee stated that the hydrocarbons are too high.
Acceptable max is 130, my truck is reading 233.
Any thoughts on how to lower the hydrocarbons? There are no vacuum leaks... I was thinking adjusting the throttle position sensor?
Can anyone explain how to adjust the sensor and what the resistance values are? or where I can look them up?
Also, there seems to be a slight misfire that I cannot locate so far...any ideas?