Problems with the
throttle body can cause problems with your idle. Crud and deposits can
prevent proper closing of the throttle body plates. If the throttle plate
don't seat well, this can cause a high or inconsistent idle. Remove and
thoroughly clean the throttle body with a can of spray carb cleaner to remove
dirt and grime.
Improper adjustment of the throttle stop will also cause
idle problems. Always adjust the BAC valve before adjusting the throttle
Improper or malfunctioning dashpot can cause the engine to
die under deceleration. The dashpot doesn't usually need adjustment unless
previously tampered with; the dashtop is designed to dampen the closing of the
throttle plates when you suddenly lift off the throttle. The dashpot's
white, plastic tip should contact it's throttle stop only while resting at
idle. If the dashpot is adjusted too deeply, this can cause a high
idle. If the dashpot is bad, it needs to be replaced.
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