Neon L4-2.0L VIN C (1998)
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Idle air control motor will fully close
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Idle spark advance will become fixed
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PCM will go open loop enriched
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DRB or equivalent scan tool displays engine RPM
10. If idle RPM is within the range shown below, throttle body minimum airflow is set correctly.
Odometer Reading
Idle RPM
Below 1,000 Miles
550 - 1,300 RPM
Above 1,000 Miles
600 - 1,300 RPM
11. If idle RPM is above specifications, use the DRB or equivalent scan tool to check idle air control motor operation. If idle air control motor is OK,
replace throttle body. If idle air flow is below specification, shut off the engine and clean the throttle body as follows:
a. Remove the throttle body from engine.
WARNING: Clean throttle body in a well ventilated area. Wear rubber or butyl gloves, do not let Mopar parts cleaner come in contact
with eyes or skin. Avoid ingesting the cleaner. Wash thoroughly after using cleaner.
b. While holding the throttle open, spray the entire throttle body bore and the manifold side of the throttle plate with Mopar Parts Cleaner. Only
use Mopar Parts Cleaner to clean the throttle body.
c. Using a soft scuff pad, clean the top and bottom of throttle body bore and the edges and manifold side of the throttle blade. The edges of the
throttle blade and portions of the throttle bore that are closest to the throttle blade when is closed, must be free of deposits.
d. Use compressed air to dry the throttle body.
e. Inspect throttle body for foreign material.
f.
Install throttle body on manifold.
g. Repeat steps 1 through 14. If the minimum air flow is still not within specifications, the problem is not caused by the throttle body.
12. Shut off engine.
13. Remove Air Metering Orifice 6457 or equivalent. Install purge hose.
14. Remove cap from PCV valve. Connect hose to PCV valve.
15. Remove DRB or equivalent scan tool.