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View Full Version : 1995 prostar 205 idles high sometimes


rricard205
09-12-2011, 12:25 PM
I have a 1995 prostar 205 with TBI. It will occasionally start to Idle high(900-1000) and I need to shut it down to get back to 600. Starts from cold are fine. Idle will then be good for some time than start to drift up. I had no error codes show up. The other day the Idle went to 1600. until I shut it down. This was the highest. Also need to give it a bit of gas to get to start after boat warms up. If not the boat will just kick but not stay running.
Any help would be appreciated

Skipper
09-13-2011, 11:11 PM
A few ideas:

1. Throttle is not returning to the closed position because the spring is weak or the cable has interference.

2. Vacuum leak

3. Perfect pass cable is bound causing interference

mikeg205
09-17-2011, 09:25 AM
here's a video which explains checking the IAC (idle air control) http://www.youtube.com/watch?v=406BTo4JE3A

IAC could be bad or dirty...