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No Idle, lost
I just did a complete tuneup on my 89 964. I drove it for a week with no problems. Then, all of a sudden i lost my idle. I did pull some fuses looking for a blown one this weekend. One was the computer fuse. What can make the idle go away?
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10-24-2010, 05:59 PM
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Flat Six
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"lost my idle" as in won't idle w/o keeping foot on accelerator? But runs/revs otherwise? If that's the case then sounds like a vacuum leak. Loose and/or split hose end?
D
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Dale 1985 Carrera 3.2 -- SOLD 2026 Jaguar F-Pace / 2025 Ford Bronco Sport |
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10-25-2010, 10:54 AM
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Thanks for the idea. It does start and run great. I do have to keep my foot on the gas pedal. I was wonder if the computer got reset somehow. Can pulling the fuse make this happen. I don't think I was around any vacuum hoses to cause them to fall off. I drove it 10 miles trying to reset the computer (just trying anything).
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10-25-2010, 12:27 PM
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Easy to 'bump' some hoses when trying to R&R air filter (I'm assuming you changed as part of your tune up). Seriously, sounds like false air and/or stuck (or inop) ICV. Don't think pulling fuses would've hurt anything, even if you did so while engine running (though I'd never make this a standard practice).
Does this idle issue happen when engine is cold? Warm? Both? D
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Dale 1985 Carrera 3.2 -- SOLD 2026 Jaguar F-Pace / 2025 Ford Bronco Sport |
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10-25-2010, 01:13 PM
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I know i bumped allot of things. I did all filters, spark plugs, spark plug wires, and adjusted the valves. Just odd it ran ok for a week and this just happened hot or cold. Will check all vacuum lines this weekend. Any other ideas to check?
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10-25-2010, 01:19 PM
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Thanks for your help. Will check out the vacuum system this weekend.
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10-28-2010, 06:12 AM
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Join Date: Dec 2003
Location: Arapahoe County, Colorado, USA
Posts: 9,032
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ColoPorsch,
Welcome to the Forum  You will find a lot of help here. Where are you located? Having your location under your avatar will connect you with local Pelicans and PCA members. Best, Grady
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10-28-2010, 06:27 AM
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It didn't work. I found one vacuum line off the air filter. When to start the car it idles ok for about 30 seconds then just shuts down. You can restart the car again and it will run again for 30 seconds and shut down again. (did four times) Some one says it could be a sensor or the engine management system. Any new ideas??
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10-31-2010, 03:13 PM
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1975 Porsche 911S
1989 Porsche 964 C4
1985 Porsche Carrera
