A vacuum leak can do that. Check the gasket at the base of the throttle body for a vacuum leak.
It is important to know the fuel economy of a vehicle while owning it. The 1985 Chevy Caprice has a fuel economy between 14 mpg city and 26 mpg highway.
because of u <<not part of my answer>> Probably need to check/do an allignment.
Black smoke is always too much gas. Its running too rich. Poor mpg! A good mechanic can scan it in a minute. Might be an O2 sensor failure causing 'open loop' all the time.
the therostat runs it self its in the motor maybe you mean the heat and it should not effect the ignition/spark in any way the worst it should do is the blower motor starts to smoke or it pops fuses take it in if you cant trace the prob or know how cause you ain't gonna learn on a message board.
A bad compressor belt can cause a whistling noise while running the air conditioner. A bad engine can also cause this noise.
directly in the radiator while the van is running
You will need to drop the transmission pan and replace the gasket. While you're at it, replace the filter and clean the pan.
A backfire is caused by a misfire... a cylinder fails to ignite the fuel which may cause a stutter, it may also cause a back fire due to it pushing that un-ignited fuel into your manifold where it then ignites from the heat of the other cylinders and boom you have a backfire...
This depends on the year and generation of Caprice as well as specific accessory options. Around 1971 the Chevy Caprice weighed about 4,000 pounds, while in 1976 it weighed about 4,300 pounds. Various years had similar weight, however in the early 80s an effort was made to reduce weight. I own a 1985 Caprice Classic and it weighs over 4,500 pounds -- it has a V8 engine and several options that add weight to it. In 1991 the style and engineering of the Caprice changed a great deal. The cars were lighter -- overall about 4,000 pounds. The Chevy Caprice Wagons generally weighed more than sedans and coupes.
Ur clutch may be closed if it is ur carbraiter may be bad
The steering nozzle is part of the PWC that can cause severe internal injuries while running.
Yes but with low profile tires (20-30 series) Also check the front tires for clearance while turning.