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"bobby swift" <bobbyswift@webtv.net> wrote in message
news:28011-43EB9510-280@storefull-3117.bay.webtv.net...
> The truck has a different front clip on it because it has the eng. as
> being a 302.And it doesn't have a juice can anywhere on it.I believe the
> truck must have struck something in the front,so there is no telling
> what parts are missing.I've had the truck about 6 yrs.I thought I had
> the problem solved by installing the new air pump,until I got on the
> interstate with it.You gave me a lot of good info.I guess I need a
> factory manual.I may take the manifold off and see if ther's a leak
> somewhere.I took the vent hose off the carb. and it's wet with gas.it
> has a check valve on it and another valve 1 line going to canister and
> the other one to the antibackfire valve.Thanks for the info.!
> Bobby
>
There should be a diverter valve in the air pump system that "diverts" the
air pumps out put
to atmosphere when you release the throttle so that you don't get the back
fire. The valve is usually
at the "Y" where the line from the air pump splits and goes to the
manifolds, but may also be mounted
at the pump.
The canister you found earlier is the secondary charcoal canister for the
fuel tank vent, it stores
gas fumes and then the fumes are feed via the line to the air cleaner
housing.. Then secondary
only has two lines on it, the primary three.

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