Reduced Engine Power
Causes truck to go no faster than 10 miles an hour, until it kicks into 2nd gear after 3 mins, in which case it will almost make 20 mph. What is it? In addition, the lights on my car flicker while I am driving down the highway, and if I close the door or something heavy falls in the back, the hydraulic brake assist kicks in-the whine one hears when they put their foot on the brake pedal-and the tail lights come on, all with the car off and I may be away delivering a package. I've seen the flickering lights on a couple other package cars, and even on some other non-UPS delivery trucks as well.
What's up with these things? Brown Mechanic, other mechanics?