I've noticed a bit of a rough idle the last couple of days, warm/hot idle in gear on my automatic transmission Tundra. Doesn't seem there out of gear (higher idle). At 120k I'm due for plugs, so I plan to order a set and swap in at some point in the next couple of weeks. Just have to order a set. In the meantime... is there anything that can be checked via either my Scanguage or my Techstream copy to indicate worn plugs? I'm guessing worn plugs would need higher voltage, but I don't know if timing advances so as to counteract a delay in firing, thus giving a tell-tale sign of old plugs.
I don't have a miss, certainly no CEL, but something just feels off. Am curious what can be scanned for.
I don't have a miss, certainly no CEL, but something just feels off. Am curious what can be scanned for.