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Registered User
Join Date: Aug 2014
Posts: 19
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'71 2.2E engine question
This engine is in the 914 conversion that I bought recently. Looking at the air filter box, I have a couple of fittings that don't have hoses attached, which based on my research here, is causing my high idle when warm (1600-1800rpm). Would greatly appreciate it if someone here could tell me what the two fittings circled in the attached photo should be linked to.
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02-05-2019, 05:39 PM
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Hopefully one of the experts will chime in. In the meantime if memory serves the larger opening is where crankcase ventilation is routed while the smaller opening is where air from the engine fan is blown into the air cleaner assembly.
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Brian Miller - Scottsdale, AZ 1971 Porsche 911 T Targa @targatuesday :: 2005 Ducati Monster S2R :: 2008 Porsche Cayman S |
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02-05-2019, 06:51 PM
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I have the same engine.
Not 100% sure but I think the little pipe on the lower right is the fuel line that supplies the cold start? It should run through the air cover and connect to two lines that feed the top of each stack.
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Don't buy a Porsche until you can afford two. 1980 SC - sold 1983 SC - sold 2000 C4 - sold 1967 912.5 in DIY build |
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02-06-2019, 01:50 AM
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The lower little pipe is drain for water oïl
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02-06-2019, 02:40 AM
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I couldn't remember the details since I removed my stock airbag and switched to the motorsports style air cleaners.
I found this diagram online which shows the drain hose (12). The hose passes through the engine-tin/firewall and the little receptacle (10) is mounted to the back of the engine on the underside of the car. Usually full of sludge! 
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Brian Miller - Scottsdale, AZ 1971 Porsche 911 T Targa @targatuesday :: 2005 Ducati Monster S2R :: 2008 Porsche Cayman S |
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02-06-2019, 09:03 AM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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The single small nipple is a drain. The larger Tee is connected to both the oil tank vent line and the forward charcoal canister vent line.
Neither are the cause of high idle. What do you consider high idle? High idle on MFI can be caused by throttles out of sync or linkage that is too short. It could also be timing that is out of spec (too advanced). Time to dig a little deeper and find the cause. Start going down the list of "Check, Measure and Adjust".
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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02-06-2019, 09:10 AM
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Registered User
Join Date: Aug 2014
Posts: 19
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Quote:
As I said in the original post, when warm, the engine idles at 1600-1800rpm. I'd consider that high. |
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02-06-2019, 08:04 PM
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1974 Porsche 914 2270 Type IV
