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jtkkz's Avatar
 
Join Date: Feb 2003
Location: Bay Area, CA.
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Question '80 SC w/SSI ???

A friend of mine installed SSI and monty exhaust on his 1980 SC

Problem: when cold idles fine, when warmed up it idles eractic almost dying at times.

disconnected the O2 sensor the car idles and runs just fine.

does he need to replace O2 sensor?

what could be the problem?

thank you for all replies

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Early Porsche Reproduction Products:
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Old 10-08-2005, 09:41 PM
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Old 10-09-2005, 12:38 PM
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Get the mixture reset.

The SSI's greater free flow really changes the setting. It is probably more than the adjustment range of the Lambda system.
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Paul

1980 911SC Targa - Sold
1972 914 - Sold
Old 10-09-2005, 02:45 PM
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Cool 80SC w/SSI........

I also have an 80 SC with recently installed SSI heat exchangers and 2 in/1 out exhaust. I richened the mixture to about 3% CO and adjusted the idle speed with the air bleed screw. It starts and runs well, especially on the top end. If you close down the air bleed screw too much the idle will tend to drop too low when you close the throttle. Even though I richened the CO from 2% to 3%, I am getting slightly better fuel mileage now (17-18 mpg town / 25-27 mpg hwy).
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FEC3
1980 911SC coupe "Zeus" 3.3SS
god of thunder and lightning
Old 10-09-2005, 06:19 PM
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I can't wait to get some SSI's.

I should figure out how long they will pay for themselves with gas savings.
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Paul

1980 911SC Targa - Sold
1972 914 - Sold
Old 10-09-2005, 06:27 PM
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all fixed

replaced O2 sensor

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Old 10-09-2005, 08:59 PM
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