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
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.??