Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Idle Speed Fluctuates (MIL Works OK, No DTCs Set)

Idle speed fluctuates (MIL works OK, no DTCs set)

Idle speed fluctuates
(MIL works OK, no DTCs set)

Do the ECM/PCM idle learn procedure ECM/PCM Idle Learn Procedure.

Check the idle speed Testing and Inspection.

Test the throttle body Testing and Inspection.

Troubleshoot the A/C signal circuit A/C Signal Circuit Troubleshooting.

Also check for

Incorrect valve timing or clearance adjustment

Also check for

Intake vacuum leaks