Any body know if the 1969 Camaro fuel tank is vented? My mechanic seems to think it needed a vent line since the new tank we put in has two lines going to/from it. Another source says the two lines are for a fuel injection system and the second line is simply a return line. I've been running it for nearly two years with the new tank and it was never vented. The second line was simply blocked. My mechanic on his own accord decided to vent the tank. After a fill up today, the car started coughing out fuel in my garage through this new vent line. I'm not upset that he took the initiative to fix what may be an issue. I just want it to be set up the correct way, vented or not.

Any advice is greatly appreciated!

Thanks!

 

The vent is through the gas cap. The correct gas cap is a vented anti-surge cap. Not sure what your mechanic did but it sounds like a mess....good luck!

 

...Meaning the gas cap (and tank) is supposed to vent in only, not out. The SS 350/396 models had a vent/return line that ran from the canister fuel filter (situated between the pump and carb) back to the tank. And fuel injection? No such animal in these cars. Plug up the fitting that the mechanic vented.

 

This is and after market tank. They do make aftermarket tanks with return lines for guys doing fuel injected or LS conversions.

Block off the return in this application.

 

Thanks for the replies guys! Turns out I do not have a "Vented" cap on the tank. Got one coming from Classic. I hope that solves the issue. Friend has the vented cap on his but still gets the whoosh of air when he removes the cap. Anyone know how this cap is suppose to vent? Does it just let air in as fuel tank level drops, and not letting pressure out as it builds? Or is it suppose to equalize the pressure both letting in air and out as needed?
Inquiring minds want to know! LOL!

 

Go back and read my first post. I described how the cap, and fuel system, is supposed to work.

 

Well, I guess I missed the obvious, thanks. Got it now!

Back to the shop it goes this morning. Had some issues with it this weekend. It sputtered and died two blocks from my house and to top it off, the starter solenoid would not engage. Seems to be heat related. Just a little too hot in Vegas this weekend for the ol' girl!

 

That's normal. The cap breathing in and not out, pressurizes the fuel system, and can actually help to prevent the fuel pump from having a dry start. Your sputtering and dying from the extreme heat could very well be carburetor related. The carb could be getting too hot, especially if the crossover port in the intake manifold is still open, which could make the gas perk out of the bowl. Or the float level could be set too low. Or both. If the guy at the shop thinks it's a heat related issue, you can install a phenolic (non-metallic, non-radiating) carb spacer, or even a heat shield as an effective but uglier alternative.

 

That all makes sense to me, thanks. It's in their hands now. there is a spacer on the carb so that should help. I'll have the correct gas cap on this afternoon. As for the rest of the issues, they are going to have the car for a week or so while I'm out of town. Hopefully they can duplicate some of the issues and resolve them!
Thanks again for the advice!