Some do. Most have over 25000 hours on them and if you start one and the engine is going full throttle, shut it down and grab a different one. The throttle bodies get really gunked up and will stick wide open at times.yrc-atm I am going to ask you this question but anyone can jump in and answer it. I had to kick freight Saturday night in MI and I don't have a lot of experience with those forklifts that use the big tanks for fuel. When you fire them up after they have been sitting do they always idle super fast for about five minutes before the idle drops down and they become safe to drive? Can you explain this to me. Thanks!