Quote:
Originally Posted by vickyg
600 ish. It's happy nearer 800-850.
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If memory serves, yours is the B200F Vicky? In which case, according to Marks very useful chart, it should be 775rpm. First thought is that the idle switch isn't making on the throttle body. Easy to check, engine off and pull the throttle cable to open the throttle gently. As you pull it, you should hear a click as the microswitch opens, as you let it back (still gently) you should hear the same microswitch click as it closes.
Someone may have overtightened the throttle cable when adjusting it so check that first, should be a little slack in it at idle position. If not, adjust it to give a small amount of slack and you may even hear the microswitch click as you do it. If so, start it and let it warm up and check the idle speed, should be nearer what it should idle at.
Also check in the area of your coolant expansion tank, should be a white/red wire there on a 2-pole connector with only one wire going into it. Check to make sure nobody has left a piece of wire in here to earth. This disables the AICV which alters the idle speed.
After that there's a few more things to check if those steps don't get the idle speed where it should be.
