Hi I have a 95 B2300 5 speed with just over 300K on the engine. Just started having an issue with idle speed. It starts fine cold but idles either at about 2000 or drops to zero and stalls. Does this every time the clutch is engaged. If I shut the engine down when hot, it will crank over and over but not start until it has sat long enough to cool down again. Any ideas for a fix for this. I did ask the"technician" at the last oil change but they said i would have to take it to the dealer. Don't want to spend a lot of money on it...