Thread: stuck on high cam?

my 8969 seems to be working fine with the car in idle, but whilst driving I noticed the gas mileage being very bad. Turns out the cams were stuck on high lobe, then while driving in the city at lower speeds, it bogged then activated then bogged. It was weird. Culprit? I mean I've heard of the cams continually not activating but not deactivating all the time and being activated all the time

Use a test light to see if the cams are coming on when they're suppose to Very easy!