Hi,
we have 2 Luminas 98 3.8L and one have on idle if the engine is warm 1000 rpm and the other 900...
I did changed the sparkplugs and wires but nothing change...
The only diffrent is the 1000 rpm vehicle have changed fuel filter... Air, Oil and other stuff is made...
So why is the diffrent?
Oh the 1000 rpm Lumina have platinum spark plugs the other have regular TR55 NGK...