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Registered
Join Date: Mar 2006
Location: Minneapolis
Posts: 36
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Is it the WUR? Please Help
HI Guys,
I am ready to purchase a new WUR, but need to make sure this is the part I need, PLEASE HELP! Here are the symptoms: 1. Car starts right up immediately- 100 degrees here today 2. Comes right back to about 1000rpm, 3. Then gets really sluggish at idle, batt and Ox sensors light up 4. If throttle is applied, very rough acceleration, pop valve pops 5. If I can get it over 3000rpm, everything clears up 6. If I let it idle, it will eventually cut off Please help- The $$$ cost for a new WUR is scary if I don't need it! I did take the WUR apart and cleaned up some rough areas, including the screen. Everything looked good. Also didn't notice any kind of leaks anywhere. Thanks |
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07-15-2006, 11:26 AM
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without your system pressures, we would only be guessing just like you. but if you want me to guess..i think your mixture is off.
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poof! gone |
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07-15-2006, 11:40 AM
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Registered
Join Date: Aug 2005
Location: sydney australia
Posts: 138
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You can check the ohms reading with a voltmeter across the bi metal strip heating coil. Just unplug the connector and check the ohms reading. It should be (at a guess) a couple of ohms, say 4 to 10 ohms. Other than that you need to check the pressures.
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'83 911SC |
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07-15-2006, 11:54 AM
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18 -22 ohms.
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poof! gone |
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07-15-2006, 11:56 AM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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As Vash saids, it sounds like it may be your mixture is wrong, especially when the engine is cold. You may find you just need a mixture adjustment, or maybe your WUR is just out of spec, and just needs to have the plug knocked, rather than be replaced. That is very common w/ these cars. Getting a good read on your control pressurse tells you where to go next. If you feel adventurous, or have experience w/ this, you can try a mixture adjustment. If not, getting a baseline reading for fuel pressures and mixture is best.
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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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07-15-2006, 12:00 PM
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I hear you on the cost of the WUR. The part for my car increased from $200 to $800 in the last fours years!!!??? I have a hard time understanding why you can get a good condition 911SC for $9,000 and the WRU is $800.
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07-15-2006, 12:15 PM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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Gestalt dyslexia. When it comes to costs, the whole is less than the sum of its parts!
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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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07-15-2006, 01:32 PM
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Registered
Join Date: Dec 2001
Location: Venice Beach, California
Posts: 838
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poor running
If your car ever backfired, it knocked the sensor plate out of adjustment, which changes the mixture(CO). Set the sensor plate and then set the CO pre-cat.
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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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07-15-2006, 02:23 PM
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Porsche 911 Speedster Slantnose
