Summit L4-1468cc 1.5L SOHC (1989)
Throttle Body: Service and Repair
Throttle Body Cleaning
Throttle Valve Area
THROTTLE BODY (THROTTLE VALVE AREA) CLEANING
NOTE: Disconnect the air intake hose from the throttle body and check the throttle valve surface (for carbon deposits), by rotating the valve.
1.
Run the engine until warm.
2.
Remove the air intake hose from the throttle body.
3.
Spray cleaning solvent into the valve through the throttle body intake port and leave it for about 5 minutes.
4.
Start the engine, race it several times and let it idle for about 1 minute.
NOTE: If the idle speed becomes unstable (or if the engine stalls), slightly open the throttle valve to keep the engine running.
5.
Repeat steps 3 and 4 until the throttle valve surface is free of carbon deposits.
6.
Attach the air intake hose.
7.
Disconnect the negative battery terminal for more than 10 seconds and reconnect it (to clear any codes that are set).
8.
Adjust the idle speed control and throttle position sensor.
