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Join Date: Jul 2010
Location: Cape Girardeau, MO
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New carb install - question

I've installed PMO 46's on the 3.0L in my 71 911T. There is a constant smell of gasoline around the car now. Is this normal? I've been all over my fuel lines and can't find any leaks of any kind. I don't remember this being the case while I had a 2.2L with Webers in there for a short while, but that was over 18 months ago.

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1971 Light Ivory 911T - Gretchen - sold

Looking for Engine # 6114097

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Old 03-27-2017, 01:32 PM
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83 911 Production Cab #10
 
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Do you have a Fuel Pressure Gauge in your set-up?
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83 911 Production Cab #10, Slightly Modified: Unslanted, 3.2, PMO EFI, TECgt, CE 911 CAM Sync / Pulley / Wires, SSI, Dansk Sport 2/2, 17" Euromeister, CKO GT3 Seats, Going SOK Super Charger
Old 03-27-2017, 01:59 PM
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The float bowls of the carbs do vent to the atmosphere and today's fuels do vaporize more than the gasoline of old, hence more smell. With modern, closed EFI systems, people tend to forget how much these older fuel systems smelled.
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Old 03-27-2017, 02:44 PM
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I do have the PMO pressure gauge installed.

Jack Stands, that's what I'm afraid of. My wife is asthmatic and the strong smell is hard on her. I still have a lot of tuning to do and it was initially very rich. If it doesn't lessen I may consider a switch to EFI.
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1971 Light Ivory 911T - Gretchen - sold

Looking for Engine # 6114097

2010 Cayman
Old 03-28-2017, 04:26 AM
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I'm not too familiar with PMO carbs, but can you vent them to a charcoal canister?

Old 03-28-2017, 04:58 AM
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