Engine Performance - Fiero L4-151 25L (1985) Idle Speed
Idle Speed: Technical Service Bulletins
Fuel - Minimum Idle Speed Adjustment Warning
Nomber 85-6(Gasoline)-8
Date
2/85
Subject:
MINIMUM IDLE SPEED ADJUSTMENT 1982 THRU 1985 2.5L-TBI (ENGINE CODE R, U, 2) and 1.8L-TBI (ENGINE CODE J,
O) ENGINES
Adjustment of idle speed by using the throttle stop screw (minimum idle speed adjustment) should not be attempted on the above engines. Idle speed on
these engines is ECM controlled and can not be adjusted with the throttle stop screw. If idle speed is incorrect, see "Driveability Symptoms", Section
6E2.
The throttle stop screw is factory set and sealed. Adjustment may be necessary only when the throttle body has been replaced.
