Idle changes when removing oil cap or dip stick
#1
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Idle changes when removing oil cap or dip stick
Hello,
I have a 1993 Mazda MX-3 GS that I am selling. A possible buyer took a look at it and noticed that the idle changes when removing oil cap or dip stick? Is this something to be concerned about? I would think that this is not a problem given the change of oil pressure. The car does not stall, but rather the idle speed changes and comes back to normal in a few seconds after the oil cap/dip stick is removed. As far as I know, there is nothing wrong with the car.
Thanks,
Mark
I have a 1993 Mazda MX-3 GS that I am selling. A possible buyer took a look at it and noticed that the idle changes when removing oil cap or dip stick? Is this something to be concerned about? I would think that this is not a problem given the change of oil pressure. The car does not stall, but rather the idle speed changes and comes back to normal in a few seconds after the oil cap/dip stick is removed. As far as I know, there is nothing wrong with the car.
Thanks,
Mark
#3
Vacuum leak via the PCV system as New Guy indicates. I have never heard of anyone looking to buy a car (or for any other reason) remove either the oil filler cap or dipstick while the engine was running.