I'm having a curious problem with exhaust smoke from my truck that I hope someone here can shed some light on.
I’ve noticed my last couple of road trips that under certain conditions it produces a lot of exhaust smoke. It only happens when driving downhill with the throttle slightly depressed, just enough to maintain a constant speed. I’m not towing and no heavy loads in the bed and speed doesn’t seem to matter much as it happens anywhere between 40 to 65 mph, as long as I’m maintaining a constant downhill speed. With my foot off the throttle or when accelerating, it stops smoking. Also, it doesn’t smoke at all driving around town.
I'm the original owner, truck is bone stock, all original with 53k miles. Engine starts easy, idles smooth and accelerates normally, none of which produces any smoke. Mileage is decent at close to 16mpg highway and all else seems to be operating normally.
Any ideas on what could be causing it?
I’ve noticed my last couple of road trips that under certain conditions it produces a lot of exhaust smoke. It only happens when driving downhill with the throttle slightly depressed, just enough to maintain a constant speed. I’m not towing and no heavy loads in the bed and speed doesn’t seem to matter much as it happens anywhere between 40 to 65 mph, as long as I’m maintaining a constant downhill speed. With my foot off the throttle or when accelerating, it stops smoking. Also, it doesn’t smoke at all driving around town.
I'm the original owner, truck is bone stock, all original with 53k miles. Engine starts easy, idles smooth and accelerates normally, none of which produces any smoke. Mileage is decent at close to 16mpg highway and all else seems to be operating normally.
Any ideas on what could be causing it?