smart: My engine is running too fast on my 1991 plymouth voyager mini van. I want to try and spray carb. and choke cleaner but don't know how and where to do it. Can you please kindly describe where I can find the air cleaner/butterfly thingy?Where is the air cleaner on 1991 plymouth voyager mini van?Find the biggest plastic black ductwork leading from the front left or right air cleaner assembly to the throttle body. It's easier to simply ask someone who knows to point it out to you. But can you remove the ductwork yourself and clean the throttle body plate? http://www.mobil1.com/USA-English/MotorO鈥?/a>Where is the air cleaner on 1991 plymouth voyager mini van?lIt is in back of the engine,looking straight back from when you open the hood,It sounds more like a vacuum leak.their is a hose some where on top that is broke or pulled off,start the engine hood open.and follow all black hoses listen for a hissing or sucking sound.plug it back in or replace the line