I just replaced the plugs on my 03 4runner. It has 145k on it and appears to have been the original plugs. For fun I checked the gap on the old plugs and everyone of them was around .080. The truck has ran fine before this, though the gas mileage was a tad low. So my question is with the old plugs being so far out of gap, what was it affecting with the engine? I havent had a chance to drive to yet, but do notice it starts much easier now.
