Mechanics

WHY DOES A SC400 LOSES POWER AND KNOCKS OFF WHEN IDLING??

1995 Lexus SC 400 • 250,000 miles

When idling at low RPMS, engine loses powwer and frequently knocks off. Runs fine at higher RPMS
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Paul Dennis
October 25, 2011.



Clean and test the idle air control valve and also the throttle body-also the TPS and the MAF sensors

Rasmataz
Oct 26, 2011.