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Ted G.
Ted G., Rigger, Diagnostician
Category: Boat
Satisfied Customers: 6155
Experience:  40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness
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I have a Nordic Heat with a 496 HO. When it's running, the

Customer Question

I have a Nordic Heat with a 496 HO. When it's running, the sensor gives off two beeps about every 2minute. What causes this?
Submitted: 2 years ago.
Category: Boat
Expert:  Ted G. replied 2 years ago.

Most likely you have a failing Idle Air Control valve, very common on the 496. And in most cases will not set a code. Often if you use a scanner you can see the idle counts at around 99 (too high) which indicates the IAC has failed.