Service engine light is coming on when load is applied to 1995 3.4 V-6 engine with 64k miles in a Chev. Lumnia sedan.Service engine light stays off at idle rpms. Had the codes read and trouble code P1640-QDM-1 failure was read.I tried dis-connnect of battery to see if computer would clear code with no luck. Any suggestion,vechile starts and runs find no rough idle.??
Engine Code
Aug 27, 2005
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