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#1
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70 Trans Am strong fuel odor after driving.
I have a new to me 70 Trans Am, RA3 4-speed. Trying to sort out some issues. First up is a VERY strong fuel odor after driving. Not as noticeable under the hood, seems to be from the rear of the car, gas tank area. I have checked the rubber lines under the passenger seat, they seem fine, no leaks.
Any suggestions before I drop the tank to check all the lines?
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#2
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This have EEC? Seen those plastic "boxes" leak with modern fuel, and its warm enough there to vaporize it instantly.
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
#3
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This was a California car, so yes it has the EEC. The canister under the hood has been disconnected, I guess I will need to figure this out as well.
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#4
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All 5 hose connections can be seen and serviced without dropping the tank. Two are from the sending unit which is hard piped from the top to the two longer hoses on the upper front passenger side. Three other connections are short pieces connecting to chassis mounted hard lines. Best to have a lift for easier access.
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1970 Trans Am RAIII 4/spd Blue/Blue Van Nuys built 1977 Can AM 400ci Sunroof car 1973 Grand Prix 400 A/T (Parting out) |
The Following 2 Users Say Thank You to mlewisariz For This Useful Post: | ||
#5
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The EEC is ABOVE the factory crossflow Muffler, and is the Piece I am talking about. It is 1970 Cailf car only. Also used a canister up front, but smell is out back.
I have a set up off a 1970 Formula if you need pics. These were FACTORY installed in California built AND Norwood built Firebirds Sold in California.
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather Last edited by Formulabruce; 03-06-2023 at 04:39 PM. |
#6
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Quote:
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#7
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Quote:
With it all hooked up and working properly, you won't have any gas smell. My 70 Formula built and sold in California has all the stuff Formulabruce mentioned, hooked up and working. Me personally, I'd go through the whole system checking lines and get everything hooked back up as it should be and go from there. |
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#8
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Does anyone know if a replacement canister that mounts above the tank, is it available today? or something that would function in its place?
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#9
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If you're referring to the piece that Formulabruce pictured, I think they call that the separator assembly.
I don't recall seeing those sold new anywhere but I would think they would be. You can buy the charcoal cannisters new so I would think the separator would be available somewhere. |
#10
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Quote:
I would sell what I have in the pic if needed and it has never seen any alcohol fuel. Obviously new high heat fuel lines are required. You should be able to get it going without too much trouble. Does your car have the EEC unit and the front canister still in the car?
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
#11
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Quote:
Anyone have a diagram on how this all hooks up?
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#12
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Looking for a diagram on how the EEC system is laid out.
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#13
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I have that but cant get to it for a few days. May be in the 70 Firebird suplement manual.
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"The Future Belongs to those who are STILL Willing to get their Hands Dirty" .. my Grandfather |
The Following User Says Thank You to Formulabruce For This Useful Post: | ||
#14
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Can someone tell me the correct size fuel line hose and the hose size for the vapor lines?
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#15
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This “vapor separator” is intended to keep liquid gasoline from making its way to the canister. Liquid fuel can deactivate the charcoal. Unfortunately the 70 only California-only separator was replaced by the standpipe set up behind the rear seat on all 71 and later 2nd gens. I suspect once you connect everything your fuel smell issue will be solved.
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#16
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Do you have a vented fuel cap ?
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If your not at the table you're on the menu A man who falls for everything stands for nothing. |
#17
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#18
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#19
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Quote:
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1971 Trans Am - Sold 1977 Can Am - Sold 2002 Trans Am Firehawk - Sold 2004 GTO - Sold 2006 GTO - Sold 1970 GTO - Sold 1972 Trans Am - Sold 1970 Trans Am - Current Project |
#20
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__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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