Whistling noise - ZR-1 Net Registry Forums

XfireZ51 · 03-20-2019

Quote:

Originally Posted by 1991KOTH

Idles at about ~800 when cold but “searches” for a bit when Im coming to a stop and put the clutch in. When it warms up the idle can be quite erratic. Check engine light also comes on and off at times. Gonna have to put a piece of cardboard up to the airhorn and see if the engine stalls out tomorrow.

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Yes I would block the airhorn. Idle hunt when coming to a stop w clutch disengaged is not unusual and not necessarily indicative of a vacuum leak. See if SES has a code to it.
What are the conditions that have SES come on?
If idle oscillates w warm engine, could be vacuum leak.