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CIS runs badly when warm up
My 79' 911SC runs poorly when up to operating temp. I suspected the freq. valve and the sensor plate. When the car was cooled down it ran well but when warm I have to pump the gas and floor it to get it to run, then it only runs well above 4K RPM. Should I look now at the WUR?
Mike |
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08-12-2004, 11:37 AM
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Registered
Join Date: Dec 2001
Location: Venice Beach, California
Posts: 838
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cis
There has to be someone in your area that has a set of fuel pressure guages that can test the fuel pressure both hot or cold. It sounds like a chech valve problem.
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Racing Porsche for over 30 years. http://www.OttosVenice.com Check out the Porsche Owners Club Track event Videos |
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08-12-2004, 12:55 PM
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Join Date: Aug 2003
Location: Pacific Northwest
Posts: 389
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If you're going to try to deal with it yourself you MUST have CIS test guages. Otherwise youl'll be replacing the wrong parts. It's the best investment you can make.
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08-12-2004, 01:00 PM
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Join Date: Aug 2003
Location: Pacific Northwest
Posts: 389
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Forgot to mention that you'll also need a Bosch CIS book.
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08-12-2004, 01:01 PM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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Sounds like the WUR. You can check the warm control pressure w/ the gauges the others have mentioned.
__________________
Paul Yellow 77 Sunroof Coupe/cork interior; 3.2L SS '80 engine/10.3:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein B6; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Firestone Firehawk Indy 500s; PCA/UCR, MID9 Never leave well enough alone |
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08-12-2004, 01:08 PM
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1976 Porsche 914 2.0L
