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mack6820's Avatar
 
Join Date: Nov 2005
Location: Moore, OKlahoma
Posts: 563
high revs when warm

Hey guys. My 83 3.0L still holds rpm at approx 2000 even after a 30 mile drive to work. Does it sound like the WUR? How do I check it?

Old 12-17-2007, 02:02 PM
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JK-81SC's Avatar
 
Join Date: Oct 2002
Location: Monument, Colorado
Posts: 266
When my car had that problem it was a dirty distributor. Gunk on the sliding weights for the mechanical advance wouldn't let the advance return to the idle position.

Do a search on measuring the fuel pressure if it's not the distributor. It's not hard to measure the fuel pressure, once you buy the kit. I got mine from JC Whitney for about $70.
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Jeff
1981 911SC Coupe - SSI's + Dansk, MSD, AC delete, Heater Backdate, Euro ride height, polygraphite bushings, Rennshift
1998 F-150 4x4 - Snow Time
1998 Yamaha WR400 - Mountain Ride
Old 12-18-2007, 07:10 AM
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sean m's Avatar
 
Join Date: Apr 2006
Location: NE Atlanta
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Hey Mack......my 77 had the same thing. Stayed on 2000 after completely warmed up. Posted info here. Everyone said before you start replacing stuff, messing with WUR, idle speed etc. be sure it's not a vacuum leak.

THOROUGHLY checked hoses and....yep, you guessed it....had a hose with a little crack at a connection.

Replaced the hose, idles perfectly.

Sean
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'77 911S Targa Ice Green
Old 12-18-2007, 10:02 AM
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Good point Sean, vacuum leaks are a good place to start.

The WUR gets blamed a lot, but most of the time it's something else.
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Jeff
1981 911SC Coupe - SSI's + Dansk, MSD, AC delete, Heater Backdate, Euro ride height, polygraphite bushings, Rennshift
1998 F-150 4x4 - Snow Time
1998 Yamaha WR400 - Mountain Ride
Old 12-18-2007, 11:05 AM
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Location: Moore, OKlahoma
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good point, i'll check it out in the morning. Thanks guys

Old 12-18-2007, 03:50 PM
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