When I take my foot off the gas, the vehicle will slow down about 5 mph and then keep going at that speed even with my foot off the gas. In town I typically go about 30 mph on the roads here. If I take my foot off the gas, it slows down to 25 and will keep going that speed until I brake. This morning I was going 25, took my foot off the gas and it (slowly) slowed down to 20 and stuck there.
Vehicle is a 2003 GMC Envoy with the 4.2, 108k miles. Has a lot of new parts and fluids, and I cleaned the throttle body and put in new plugs a month ago. I had a shop put in a new valve cover gasket at the same time (maybe there is a leak there?). This is something I just noticed, but it might have been doing it since I've owned it without me noticing (bought it at the end of July). I don't go on the hwy much, but last time I did the vehicle slowed down while coasting from hwy speeds to the point where I'd normally brake (around 40 mph).
To keep going a given speed it needs air and fuel. Any ideas?
Vehicle is a 2003 GMC Envoy with the 4.2, 108k miles. Has a lot of new parts and fluids, and I cleaned the throttle body and put in new plugs a month ago. I had a shop put in a new valve cover gasket at the same time (maybe there is a leak there?). This is something I just noticed, but it might have been doing it since I've owned it without me noticing (bought it at the end of July). I don't go on the hwy much, but last time I did the vehicle slowed down while coasting from hwy speeds to the point where I'd normally brake (around 40 mph).
To keep going a given speed it needs air and fuel. Any ideas?