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engine idle question
Hello, I just got my 1976 porsche 911s targa running after recently purchasing it as it had not ran since 2003 due to a broken shift fork. I replaced all the clutch and fork, all tune up parts and fluids. She fired up and seams to run very well. My question is when the motor comes back to idle it stops at about 2000 rpms for a few seconds before it drops down to 950 where it should be. Maybe this is normal ? I checked the throttle cable and it is not getting stuck anywhere , also about 3500 the motor seams to lump a tad bit. Any help would be great! Thanks
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05-19-2015, 08:21 PM
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Forgot to mention when I disconnect the vacuum line on the distributor the rpm goes from 950 to 2000 that does not seem correct to me . That might be part if the problem or a different problem. Thanks
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05-19-2015, 09:51 PM
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Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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that is a vacuum retard. not sure exactly what yours is but some had as much as 15 degrees retard. set you r timing for 30 degrees full advance and just use the idle timing as a ref.
there is a decel valve (DV). it is behind the throttle body. it holds the RPM up and lets it come down kind of slowly.
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86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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05-20-2015, 02:28 AM
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Join Date: Dec 1999
Location: Novato, CA
Posts: 4,740
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Quote:
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05-25-2015, 09:57 AM
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