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DiscoWeb Bulletin Board » Message Archives » 2003 Archives - Discovery Technical » Archive through February 02, 2003 » RPM's going up and down when in park « Previous Next »

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Will Bobbitt (Rkores)
Posted on Saturday, January 18, 2003 - 11:31 pm:   Edit Post Delete Post Print Post

On my dad's D2 often when you crank it up the RPM's go up to 2500, then down to 1100 and back up. It does this endlessly. Once it's put in gear the RPM's go back to normal and the vehicle drives fine. Any idea what the problem is? The vehicle is an '01 D2 with 34,000 on it.

Thanks,
Will
 

Leslie N. Bright (Leslie)
Posted on Sunday, January 19, 2003 - 05:14 pm:   Edit Post Delete Post Print Post

Is your A/C button on? The RPM will cycle when it is, or when other electrical items are on, to help compensate. I wouldn't worry, it's probably fine....


-L
 

Kennith P. Whichard III (Kennith)
Posted on Sunday, January 19, 2003 - 06:20 pm:   Edit Post Delete Post Print Post

Sounds normal,

How many revs does the tach show after the temp guage is is dead in the middle (after about 10 minutes)?

Cheers,

Kennith
 

johnb
Posted on Saturday, February 01, 2003 - 06:03 pm:   Edit Post Delete Post Print Post

is the tach driven from the alternator like my d1 ? just a thought,but maybe the alt is heading south.
 

Jason T. Barker (Speedminded)
Posted on Saturday, February 01, 2003 - 10:44 pm:   Edit Post Delete Post Print Post

In other words...the engine is "surging"?
 

Jason T. Barker (Speedminded)
Posted on Saturday, February 01, 2003 - 11:31 pm:   Edit Post Delete Post Print Post

...if so, no it is not normal. It should not do it in any gear or at any temperature....could be a vacuum leak. Has any work been done under the hood prior to the problem or possibly a car wash disconnecting a hose?

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