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Somatic Negative Optimist
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1980 SC lumpy idle plus
My 1980 SC had a top-end rebuild, re-ring, reseal, SSI's installed with Flowmaster muffler and runs great. The idle is not really smooth and it sometimes sputters on up-shift below 3000 RPM. But what is most annoying is the gargeling and spitting when coasting in any gear. Aside from tweaking the mixture some more, what gives? This is a standard 3 liter CIS with vacuum advance/retard on the distibutor and SC cams. There is no more CAT or OX sensor and it runs on 5 degrees BTDC. Very good at anything above 3500, really wants to go. Has anyone had similar experience with sputtering below 3000 and lumpy idle plus this aweful ruccus when coasting? Thanx anyone.
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1980 Carrerarized SC with SS 3.2, LSD & Extras. SOLD! 1995 seafoam-green 993 C2, LSD, Sport seats.  Abstract Darwin Ipso Facto: "Life is evolutionary random and has no meaning as evidenced by 7 Billion paranoid talking monkeys with super-inflated egos and matching vanity worshipping illusionary Gods and Saviors ". 
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05-14-2002, 06:29 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,445
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got yer frequency valve workin? it has to function. disconnect the computer relay under the right seat. if the idle doesn't change, that's the problem.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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05-15-2002, 06:27 AM
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Somatic Negative Optimist
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Thanks John: I'll try your suggestion and I noticed the relay under the seat, but where is this frequency valve you are refering to?
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1980 Carrerarized SC with SS 3.2, LSD & Extras. SOLD! 1995 seafoam-green 993 C2, LSD, Sport seats. Abstract Darwin Ipso Facto: "Life is evolutionary random and has no meaning as evidenced by 7 Billion paranoid talking monkeys with super-inflated egos and matching vanity worshipping illusionary Gods and Saviors ".
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05-15-2002, 07:43 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,445
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the frequency valve is in front of, and below the sensor plate housing. it looks like an electric injector with a black snap on plug. it makes a distinct buzz/rattle when it is working. they don't fail much, it's usually something else upstream. if the idle falls off when the relay is unplugged, you don't have to worry about it.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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05-16-2002, 07:09 AM
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ME 262 (SOLD)
Colibri
Gas Mizer
Mileage King
Dog Bus
