What should my idle be?

03-22-2001, 07:14 AM

I just got my '83 SC back from getting a tune up, valve/ timing adjustment and compression/ leakdown test. All the numbers were great. I am noticing that my idle is now around 1500 RPM, vs the 1000 that it was before. Which is correct? Is this highjer RPM a problem? Should I get my mechanic to fix it?

Thanks!

Magilla

03-22-2001, 08:12 AM

A high idle won't hurt anything, but it's annoying.

Just reach in with your left hand a turn the big knob on the throttle body clockwise, while looking through the rear window at the tach. Do it when the engines warm. Difficulty Level 0

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Bill Krause
'79 911SC Euro

03-22-2001, 08:46 AM

I think spec is 950 to 1100. Although I know several people who set it higher than this. Not sure why, but they seem to like it. Mine is set at 950. When I check it with the tach on my timing light, my dash tach is off (low) by about 200-250 RPMS.

Yeah, just turn the large bypass knob until you are happy. Very easy, nothing you can really mess up.

Nick.

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Nick Shumaker
1982 911SC Coupe
nickshu@yahoo.com

03-22-2001, 10:09 AM

Hold on: are you saying that it "floats" at the higher idle, and will settle to a lower rpm at times? That is, it is at 1500rpm and you, for example, cover the airbox intake and it goes down? That would be a different situation than resetting your idle via the air screw on the throttle body.

Jw

03-22-2001, 10:32 AM

No, there is no fluctuation. Once the car is warmed up, it consistently runs at 1500 RPM. Sounds like the knob adjust will work!

Thanks, all.
Magilla