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Is it the idle control valve?
I have done my search and I think it is the idle control valve...
My 85 3.2 has a perfect idle with the expection of on two occassions when in heavy traffic the idle began to pulse between 800 and 1500 when I would stop. As I sat in traffic and the engine temp rose to the 10 o'clock mark, the idle pulsed and then as traffic broke, and engine temp returned to normal, the problem went away. Have no issues on start up, when cold, etc; only in the described above scenario. In searching archives, seems that idle control valve is likley culprit. If so, is replacing the unit the only solution or can it be "cleaned". Thanks Chris
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Chris 1985 Carrera http://www.pelicanparts.com/gallery/ckmaggie |
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10-21-2004, 07:13 AM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
Posts: 16,500
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It can be cleaned. Take it off, easy to do, and spray it out with some brake cleaner. Make sure you install it in the same position you took it out.
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Kurt V No more Porsches, but a revolving number of motorcycles. |
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10-21-2004, 07:17 AM
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I'm concerned about your engine temp rising to the 10 o'clock level....
Please explain....
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The Fox Carrera |
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10-21-2004, 08:47 AM
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I have a spare ICV if you want to diagnose your idle issue
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The Fox Carrera |
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10-21-2004, 08:48 AM
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I would think a bad ICV would show up at start-up as well. It sounds like the engine temp rise is affecting something else that is not quite right. This could be one of the sensors (CHT?) that might indirectly control the (possibly good) ISV. It could also be a vacuum leak, manifold leak, or other that occurs because of the elevated temp. The first thing I look for with an irratic idle is a vacuum leak, it's not always easy to find, but it's usually a cheap fix. I'm guessing now so I'll step aside and let the experts chime in. But I agree with "kqw" the temp rise is a concern.
Good Luck Andrew
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'88 Carrera Cab 3.2 Diamond Blue Metallic - ERP Polybronze Bushings, ERP Monoballs, SW Chip, Bilstein Sports, 930S Steering Wheel, DAS Rollbar, Sparco 5pt Harness, Hunsaker Sport Seats, Dansk Pre-Muffler, MK 1in-1out Exhaust, Magnecor KV8.5 Wires '86 944NA, Sunroof Delete, Track Rat, Full Cage '72 914 1.7 Guards Red / '02 Audi S4 Light Silver Metallic Last edited by aj88cab; 10-21-2004 at 09:48 AM.. |
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10-21-2004, 09:27 AM
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Location: Novato, CA
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Is your head temp sensor still the original single wire style?
Joe |
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10-22-2004, 07:39 AM
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1985 Porsche 3.2 Carrera 3.2
1988 Porsche Carrera Cabriolet 3.2
