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Better idle...what happened?
It's been months since I've posted. Good to be back at the board. Thought I'd solicit opinions on my car's idle (stock '74 911 CIS). I always start per the manual - hand throttle up until warm and then whatever is necessary to maintain just under 1000 rpm's. This has worked fine for me since I bought the well-maintained car back in December of last year, but for the past couple of months, it hasn't idled very well unless i keep the hand throttle almost all of the way up all of the time...put it down and it would likely stall.
Had a theory that all it needed was to be run hard and burn carbon off of the plugs, so I took it on two three hour trips (driving particularly fast) and replaced the battery. Now the car idles just fine - hand throttle up to start for a few minutes then all the way down and it idles great...maybe a little high (1100-1200). This sounds dumb...did my car fix it's own idle just by giving it a good hard driving? 
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09-29-2002, 09:54 PM
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idle
hi
mine is doing the same thing, i will have to try out your theory gar
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1975 911S Targa Silver Anniversary Edition |
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12-08-2002, 05:32 PM
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Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,512
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Any change in fuel sources?
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12-08-2002, 06:52 PM
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Since I posted this in September, my knowledge of CIS, etc. has jumped by leaps and bounds. Almost funny to see my old post now that I'm such a 'pro'!
 I've since learned how to replace points, use a dwell meter, check and set timing, adjust idle air bypass, etc. and no more of this problem. It seems the more I work on this car, the more I want to work on this car...and so on... Ryan
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To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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12-08-2002, 07:39 PM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
Posts: 16,484
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Just be happy.
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Kurt V No more Porsches, but a revolving number of motorcycles. |
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12-09-2002, 06:34 AM
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1974 Porsche 911 2.7
