Air sucking sound with air filter installed
Engine will start and RPM will go to 1000 + and come down to 550 or so then
drop and stop; sometimes with a loud sucking sound. IAC was replaced.
Check seal around IAC and all vacuum hoses. Spray carb cleaner around base of IAC if engine revs up replace gasket or vacuum hose may have come off.
I have explored this problem for a good long while & found, one should turn on the ignition & wate for all the sensor & indicator lights to go off befor befor starting engine, when the sucking sound begins turn ignition off & repete the steps again. Do this every time for about a month & the sucking noise will learn to stop. Still I continue to wate for indicator light to of off befor start up.
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