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#1 |
Registered User
Join Date: Aug 2002
Location: Phoenix, AZ 85018
Posts: 102
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Wondering if anyone knows the specifics on emissions requirements. Specifically the "Gas Cap Test" requirement. At least in AZ they do exhaust check on anything newer then '66, and they also do a gas cap check. I'm just not sure what that is.
I know on my newer vehicles they do some sort of pressure thing, clamp a line and put some cap with vacuum lines where the regular cap goes to check for system leaks. I'm thinking on the older stuff they only want to see a cap, that it can be removed and the seal is not cracked (i.e. bad rubber). to the nuts and bolts - the reason I am asking is that I did a custom tank install (spare tank area) with a fuel fill neck utilizing a vented gas cap that is for use on motorcycles. I don't know that motorcycles go through the same requirements. (should have thought of that sooner) Anyways, the cap has a rubber o-ring, I built the neck with a vent that goes to the tank, etc. Anyone see any issues or should I just take it through and see if I pass. Thanks in advance for helping calm my nerves. I'll post pics of the install soon.
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Jimmie Modern Vintage Autoworks - '70 Chevy C10 - '74 Chevy C30 3+3 Dually - '04 Chevy Colorado Built, NOT, Bought. If you build it...they will ENVY! Drive Slow, Scrape Hard, or Take Your Truck and GO HOME! |
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#2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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I'm pretty sure the 70 would have a vented cap stock.
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#3 |
Registered User
Join Date: Jul 2003
Location: north of Phx AZ about 30 miles
Posts: 698
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Worst thing that will happen is they will make you come back with a new gas cap.
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Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold |
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#4 |
My other Love
Join Date: Aug 2001
Location: Castlegar B.C. Canada
Posts: 4,085
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shouldnt all tanks have a vented cap, otherwise how would the air get into the tank, I remember I had a unvented cap on my 74 Cheyenne once without knowing, and the tank was imploding and my truck would stall
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![]() Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life |
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