P0507 Diagnostic Trouble Code Discussion for January 2026
Idle Speed Higher Than Expected
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| Help Request | Posted | |
| 2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, MIL Lamp on VIN: 2GCEC19T8Y P0507: Idle Speed High. I have smoke tested this engine and cleaned throttle body. I can remove intake and feel the iac is shutting but idle still high. The ecm starts at 180 for counts then goes to zero. I have new egr and intake gaskets. The purge and egr are good. I observed t... |
January 20, 2026 |
