idle changes after I let out clutch in neutral?

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kpc_0721
Posts: 350
Joined: Fri Jan 26, 2007 2:37 am
Car: 1991 240sx hatchback

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if im in neutral and rev the car up while holding the clutch in and then let it out as its coming down the idle seems to drop.....anyone have and idea why it would be doing this?


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boznuttz
Posts: 3515
Joined: Tue Mar 14, 2006 11:25 pm
Car: MS13

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The flywheel, clutch, and pressure plate are constantly in contact. However, when you depress the clutch pedal to the floor, you send brake fluid (same that you use for clutch) from the master cylinder to the clave cylinder, which in turn pushes against your clutch fork. When the fork is pushed, the transmission itself acts as a fulcrum. The clutch fork pushes the throwout bearing against the metal splines of the pressure plate, which in turn relieve pressure from the pressure plate, which in turn also relieves pressure from the clutches constant contact with the flywheel and pressure plate.

When there is less contact, then the flywheel spins independantly from the clutch and pressure plate = less rotational mass.

When the pressure plate is sandwiching the clutch inbetween the flywheel and itself, then there is more rotational mass.


S13FX
Posts: 1892
Joined: Sat Apr 30, 2005 10:59 am
Car: '69 l20b Dimeski :)

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BRAVO BRAVO WOOOOOOOOOO BRAVO

kpc_0721
Posts: 350
Joined: Fri Jan 26, 2007 2:37 am
Car: 1991 240sx hatchback

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ohhh I wasnt sure if it was just my car that did it cuz every other stick I have drove dosent seem to do it.....and I really dont understand wat you said haha but thanks for the input man

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GEO
Posts: 6449
Joined: Mon Jul 07, 2003 3:15 pm
Car: 95 240sx KA-T
Contact:

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The car has load to it.


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