 Carbs and Gas Smell |
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| mmascari |
 Apr 21 2023, 10:12 AM
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#1
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Member  Group: Members Posts: 322 Joined: 1-September 14 From: Concord, CA Member No.: 17,850 Region Association: None  |
I have a 914 with a 3.0l six and PMO carbs. The gas smell is unbearable, especially when the car is in the garage. My wife is about to lose her mind. What do you carb guys do to limit this? Would running the engine with the fuel pump off, IE running out of fuel help with this situation?
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| NARP74 |
Apr 21 2023, 11:15 AM
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#2
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Senior Member Group: Members Posts: 1,375 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
This also brings up the return line vs no return line debate. That pressure has to go somewhere...
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| porschetub |
Apr 21 2023, 11:19 PM
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#3
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Advanced Member Group: Members Posts: 4,869 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(NARP74 @ Apr 22 2023, 06:15 AM)  This also brings up the return line vs no return line debate. That pressure has to go somewhere... Not sure about that,with the LP pump not running there is no residual pressure like an FI car,the fuel bowls are full and stay that way until the engine is running again then the float valves regulate fuel demand from there as set by the float levels . The OP may have too higher float setting or bad float valves or as mentioned an external leak . All factors to consider. |
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| 930cabman |
Apr 22 2023, 07:23 AM
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#4
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Advanced Member Group: Members Posts: 4,167 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States 
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QUOTE(porschetub @ Apr 21 2023, 11:19 PM) QUOTE(NARP74 @ Apr 22 2023, 06:15 AM) This also brings up the return line vs no return line debate. That pressure has to go somewhere... Not sure about that,with the LP pump not running there is no residual pressure like an FI car,the fuel bowls are full and stay that way until the engine is running again then the float valves regulate fuel demand from there as set by the float levels . The OP may have too higher float setting or bad float valves or as mentioned an external leak . All factors to consider. I have ran carb'd Porsches and VW's for years always dead headed (no return line) and never had an issue |
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| porschetub |
Apr 22 2023, 01:17 PM
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#5
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Advanced Member Group: Members Posts: 4,869 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(930cabman @ Apr 23 2023, 02:23 AM) QUOTE(porschetub @ Apr 21 2023, 11:19 PM) QUOTE(NARP74 @ Apr 22 2023, 06:15 AM) This also brings up the return line vs no return line debate. That pressure has to go somewhere... Not sure about that,with the LP pump not running there is no residual pressure like an FI car,the fuel bowls are full and stay that way until the engine is running again then the float valves regulate fuel demand from there as set by the float levels . The OP may have too higher float setting or bad float valves or as mentioned an external leak . All factors to consider. I have ran carb'd Porsches and VW's for years always dead headed (no return line) and never had an issue (IMG:style_emoticons/default/agree.gif) done the same for years ,my six engine is no differant . |
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Posts in this topic
mmascari Carbs and Gas Smell Apr 21 2023, 10:12 AM
Osnabruck914 If everything was correct, you should not be smell... Apr 21 2023, 10:22 AM ClayPerrine Most of the carbed 914s have the charcoal canister... Apr 21 2023, 10:24 AM GregAmy That's not totally true; the float bowl is ven... Apr 21 2023, 10:25 AM
ClayPerrine
That's not totally true; the float bowl is ve... Apr 21 2023, 10:35 AM mmascari Thanks for the replies. I will look for leaks. Apr 21 2023, 10:37 AM JmuRiz Let us know what you find, I've always found c... Apr 21 2023, 10:42 AM dr914@autoatlanta.com something is leaking somewhere, maybe use a sniffe... Apr 21 2023, 10:45 AM ClayPerrine
This also brings up the return line vs no return ... Apr 21 2023, 11:22 AM rfinegan I had gas smell in may garage too, on a Carbed 75 ... Apr 21 2023, 11:24 AM Root_Werks Don't forget carbs vent to the atmosphere, the... Apr 21 2023, 11:50 AM r_towle Todays fuel sadly evaporates much faster with the ... Apr 21 2023, 12:36 PM mlindner I would check all hose clamps to lines, filter, pu... Apr 21 2023, 12:53 PM BillJ Gas cap as well. If that seal is not working righ... Apr 21 2023, 12:55 PM r_towle Fun fact.
The evaporation "system" on a ... Apr 21 2023, 01:01 PM 914_teener
Fun fact.
The evaporation "system" on a... Apr 21 2023, 05:48 PM emerygt350 Yeah, look around. I just pulled mine out to do s... Apr 21 2023, 01:06 PM r_towle
Yeah, look around. I just pulled mine out to do ... Apr 21 2023, 01:08 PM 930cabman Better get things fixed quick, or you may find you... Apr 21 2023, 01:20 PM nditiz1 As stated carbs vent to the atmos,
I have PMO... Apr 21 2023, 03:27 PM mmascari
As stated carbs vent to the atmos,
I have PMO... Apr 21 2023, 05:37 PM mmascari Looks like the leak is in the front of the car. I ... Apr 22 2023, 06:08 PM porschetub
Looks like the leak is in the front of the car. I... Apr 23 2023, 03:41 PM mmascari
Looks like the leak is in the front of the car. ... Apr 23 2023, 03:47 PM rfinegan pros and cons ...but sure you can remove the retur... Apr 23 2023, 04:01 PM porschetub
[quote name='porschetub' post='3073287' date='Apr... Apr 23 2023, 06:10 PM mmascari
[quote name='porschetub' post='3073287' date='Ap... Apr 23 2023, 07:46 PM porschetub
[quote name='porschetub' post='3073336' date='Apr... Apr 23 2023, 08:17 PM targa72e Glad you found your problem was just a leak up fro... Apr 23 2023, 10:07 PM mmascari
Glad you found your problem was just a leak up fr... Apr 24 2023, 10:31 AM Justinp71
Glad you found your problem was just a leak up fr... Apr 24 2023, 10:37 AM Rufus Resurrecting an older thread to add info.
This ... Jan 22 2024, 05:15 PM r_towle Porsche 356 has carbs and a fuel shutoff underneat... Jan 22 2024, 05:20 PM 73-914
Porsche 356 has carbs and a fuel shutoff undernea... Jan 22 2024, 08:50 PM ClayPerrine
Porsche 356 has carbs and a fuel shutoff underne... Jan 23 2024, 03:09 PM Jamie
[quote name='73-914' post='3125092' date='Ja... Jan 23 2024, 03:29 PM flipb
I've been running my 914 on locally availabl... Jan 24 2024, 11:11 AM brant
I've been running my 914 on locally availab... Jan 24 2024, 01:23 PM Rufus
Porsche 356 has carbs and a fuel shutoff undernea... Jan 22 2024, 05:23 PM JmuRiz
…I also use E0 gas exclusively
Lucky duck
Yes... Jan 22 2024, 08:48 PM mmascari By the way, for anyone that cares, the smell of ga... Jan 24 2024, 02:50 PM r_towle
By the way, for anyone that cares, the smell of g... Jan 30 2024, 09:22 PM Rufus “I'm not sure what the advantage would be of... Jan 24 2024, 02:57 PM GregAmy Prooooobably won't make any difference on our ... Jan 24 2024, 03:32 PM Rufus My quick search said the difference is slight, but... Jan 24 2024, 04:07 PM Rufus
Prooooobably won't make any difference on our... Jan 24 2024, 04:31 PM Rufus A couple more thoughts to share on venting a 914â€... Jan 29 2024, 08:55 PM |
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