I have a problem with the engine heavily backfiring in the exhaust at 5000+ rpm if I put my foot into it, particularly during merging operations on the Interstate. Maybe my foot is blocking the air flow and I should take it out of the exhaust?
Anyway, a look below the hood showed a yellow sort of dust on the plug wires, and maybe one connector not quite as well down as possible, but messing around with it did not change a thing. Anyway, I changed the plug wires and spark plugs anyway, even if they were fairly recent. The way it feels, however, is much like the rev limiter feels (burning in the exhaust, suddenly total lack of power.) On the other hand, during normal driving I have an occasional stutter where the wideband oxygen sensor drops down, suggesting (AFAIK) that the fuel is not being burned, hence an ignition problem.
Does anybody have seen something like this? It cramps my style if there is a 50/50 chance of the engine refusing to cooperate with what I want to do. Before you know it, I will be ending up driving 53 mph in the left hand lane of every Interstate in the US to avoid having to merge.
Leon