Aerostar 2WD V6-182 3.0L (1995)
STEP 3
If the engine is not idling properly, turn the engine Off, and disconnect Idle Air Control (IAC) solenoid.
STEP 4
Place the transmission in Park (A/T), or Neutral (M/T).
STEP 5
Start the engine, then using a tachometer, verify idle rpm is 600 +/-50 rpm.
Throttle Plate Orifice Plug
NOTE: A plug in the throttle body orifice will decrease idle rpm. Where as an orifice without a plug will increase idle rpm. Orifice plugs and
installation tools are available in service kit # F0PZ-9F652-A.
STEP 6
RPM TOO LOW
a. Do not clean the throttle body, check for the plate orifice plug.
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If there is no plug, turn the screw clockwise to the desired rpm +/- 25 rpm.
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If there is a plug from previous service, remove the plug, and adjust the screw in either direction as required.
NOTE: Screw must be in contact with the lever pad after adjustment.
RPM TOO HIGH
a. Turn engine Off.
b. Disconnect air cleaner hose.
c. Temporarily block the orifice in the throttle plate with tape. If the orifice already has a plug from previous service proceed to Step (e),
otherwise proceed with next step.
d. Restart the engine, and check the idle speed, using a tachometer.
NOTE: For vehicles with Mass Air applications, reconnect the air intake duct hose before checking the rpm.
If the engine stalled, crack open the plate stop screw. DO NOT over adjust.
e. If rpm continues to be fast, perform Key On Engine Off (KOEO) Self-Test.
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If Throttle Position (TP) sensor Diagnostic Trouble Code (DTC) is within range, remove tape from throttle body and check for other
possible causes.
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If TP sensor DTC is out of range, adjust screw for proper TP sensor code. Lever must be in contact with the screw.
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If rpm is still fast, terminate the procedure and check for other possible causes.
f.
If rpm drops to 600 rpm or lower, or the engine stalls, turn engine Off, disconnect the air cleaner hose and remove tape from throttle plate.
g. Install the plug with proper color code depending on throttle plate orifice size (Refer to PROCEDURES FOR PLUG INSTALLATION,
below).
h. Reconnect the air cleaner hose. Start the engine, and check the idle rpm using a tachometer. Turn the plate stop screw clockwise to 600 +/- 25
rpm.
NOTE: DO NOT turn the plate stop screw counterclockwise. This may cause the throttle plate to stick at idle.
STEP 7
Turn engine Off and repeat Steps 4, 5, and 6.
STEP 8
Turn engine Off, and disconnect the negative battery terminal for at least 10 minutes.
STEP 9
Reconnect the Idle Air Control-Bypass Air (IAC-BPA) solenoid. Verify the throttle plate is not stuck in the bore, and the linkage is not preventing
throttle from closing.
STEP 10
