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Occasional Gas Smell Issue
I have never smelled gas in my car until yesterday (owner since new). I ran the car to empty (not enough gas to start.) After filling up, I had a few hesitations, but then it ran smoothly. Yesterday, while out for a drive, I nailed the throttle and went through a few gears. I started to smell gas. After returning to normal speed for a while, the smell went away. I pulled over and lifted the engine lid. No gas smell at all. Then while climbing a long hill, I smelled gas again. Finally, after reaching the crest and driving for a while, the smell was gone. In normal (not agressive) driving , the smell did not come back in the next 10 miles before I got home.
Diagnosis?
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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10-20-2008, 03:50 PM
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Join Date: Mar 2005
Location: Auckland New Zealand
Posts: 58
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I had a similar problem with my 74 Carrera on the track - only in the cabin. I checked fuel pump connections etc but couldn't find a leak. In the end I had the fuel line running through the car replaced and the smell went away. The old line had deteriorated with tiny pin holes in a few places that seemed to let fumes out under load ie full throttle. Difficult to say if your problem is the same but that fuel line in your car might be 27 years old.
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1974 Carrera Track Car - 3.0 Webers Headers and Flowmaster. 915 with Wevo Shifter, Tarrett 22mm ARB's, Elephant Racing Polybronze Bushings and Monoballs |
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10-20-2008, 04:10 PM
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Quote:
Maybe the crap from the bottom of the tank caused this in the line.
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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10-20-2008, 04:59 PM
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AutoBahned
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do emissions vapor lines first - easier
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10-20-2008, 05:09 PM
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Join Date: Jan 2004
Location: Sydney
Posts: 327
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....do emissions vapor lines first - easier ....
..and get a new gas cap - cheaper !... ..it worked for me !  Cheers, Dennis. 
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The 914-6 from my 'Lotto'garage has finally arrived. 1971 911S 2.2. 1975 Carrera Targa (ROW) - missed. One of us is fast becoming a valuable antique. |
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10-20-2008, 11:36 PM
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I have a new gas cap. Not sure what/where emissions vapor lines are.
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John Original owner '81 911SC blackmetallic coupe. Terbatrol, SSI, M+K Gen 4, SC+ cams, A/C delete, console delete, heater backdate, 7 & 8 x 16 Fuchs with polished rims, Turbo tie rods, tensioner update, Rennline engine mount bar, Mainely Custom sump plate, new top-end, corner balance. |
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10-21-2008, 09:25 AM
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AutoBahned
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trunk - you will need to search up the numerous threads on this
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10-21-2008, 10:21 AM
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Join Date: Jan 2006
Location: Santa Barbara, CA
Posts: 2,307
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New gas cap? If you can find an old inner tube or similar piece of rubber, make an extra gasket for the cap. Last time I replaced the cap I had your smell until I realized the new cap didn't seal very well. Worth a try.
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jhtaylor santa barbara 74 911 coupe. 2.7 motor by Schneider Auto Santa Barbara. Case blueprinted, shuffle-pinned, boat-tailed by Competition Engineering. Elgin mod-S cams. J&E 9.5's. PMO's. 73 Targa (gone but not forgotten) |
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10-21-2008, 10:40 AM
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1981 Porsche 911SC
