Sounds like a vent door selenoid, a frayed wire to the selenoid. The selenoid operates the vent door to close, or allow outside air into car
SOURCE: 1997 buick skylark wont start
Does it crank and not start or not even crank. You could have a bad starter. I would test the battery first. When it won't start try to jump start it. If it jump starts it's probably the battery. If it won't jump start it's probably the starter.
SOURCE: small nok in moter for 1 min when i start up
when you start the car for that 1 min dot rev it up you hear the nok because the car has been seating for a while and when you start it it takes time for oil to go everywhere and lubricate if your oil pressure is ok after 30-40 sec and the nok stops after 1 min then don't worry.
The humming would be the fuel pump coming on. It should only hum for a few seconds, then shut off.
Your problem is with the start circuit from the battery to the starter, or from the ignition switch to the starter solenoid. Check the connections at the starter (the big cable) for tightness.
Is the battery charged up enough to turn the engine over? Check by turning headlights on and observe while someone turns key to crank. If they dim a LOT, then either battery is too low, or the starter is bad and needs removing for testing. If brightness doesn't change, then the circuit from ignition switch to starter solenoid is likely not working. Check for 12 volts at the small wire to starter solenoid with key in cranking position. If you have power there, the solenoid may be bad. Remove starter for testing. If no power at solenoid in starting position, then either the ignition switch is bad or the neutral safety switch might be the problem, or the wiring from the switch to the starter solenoid is not passing current.
Good luck.
SOURCE: AC comes on about 3 to 5 min after engine start
Yes this can be caused by a low state of charge inthe system. Have an AC repair shop hook up AC pressure gauges and verify this.
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