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Registered
Join Date: Sep 2002
Location: Cedar Falls, IA
Posts: 212
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CIS mystery solved
For several months I was experiencing what appeared to be intermittent fuel starvation upon startup. Couldn't solve the problem and then last week the engine stopped completely as I was leaving an early morning meeting. I sat in the car for several minutes trying to determine whether to have the car towed.
As a last ditch effort, I opened the engine lid and took off the air cleaner and Voila! there was the problem! When the car had backfired it blew the "pop-off" valve completely out of it's opening. I placed the "pop-off" valve back into the hole and the engine immediately fired up. On the way to the office I stopped by a hardware store and picked up some epoxy. Epoxied the pop-off valve back in. That was two weeks ago and I have since had no problems with startups. Who would have thought? The mysteries of CIS. Guy Chiatello 82 SC Black Coupe |
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11-19-2004, 08:57 PM
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Registered
Join Date: Mar 2004
Location: North Jersey
Posts: 416
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That happened to me, too, some years ago. Since then I have carried an expandable rubber "freeze out plug" of the right diameter in the tool bag, thus assuring that I will never need it.
Howard
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Howard '76 911S '53 Nash (!) '01 Audi TT '82 GPZ-550 |
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11-19-2004, 09:09 PM
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Registered
Join Date: Sep 2002
Location: Cedar Falls, IA
Posts: 212
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Howard,
Cool! When I put the valve back in with no epoxie I was surprised that the car ran so well. guy |
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11-23-2004, 03:17 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,592
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as long as they don't get backfired out, you'll make it home.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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11-23-2004, 03:41 PM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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You should look into why the backfire occurred in the first place.
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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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11-24-2004, 11:55 AM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,592
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hell, they backfire any time they feel like it, even if perfectly tuned. usually it's because the cold running is too lean.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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11-24-2004, 12:40 PM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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Your cold control pressure or your mixture could be off.
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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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11-24-2004, 01:54 PM
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