In article <baw0b.1$ux2.21516@news1.trib.com>, "Robert" <roberte@trib.com>
wrote:

> I have a 1982 Civic with a 1500cc engine. I have given it a recent
> tune-up including new spark plug wires, plugs and a valve adjustment. I
> have set the carb floats and cleaned out the jets. I have checked the
> vacuum hose connections, engine compression (160psi @ 7000ft) and fuel
> filters. I have checked the vacuum advance and vacuum reading of engine
> idling is 18"mg at 7000 feet. EGR works fine.
> The problem is that it runs great until it is floored. At 35 - 40 mph,
> it starts hesitating like a governor has kicked in. If I back off the
> throttle slightly, the engine takes off and increases rpm. If I take off
> the top of the air filter, the problem goes away. I have replaced the
> element and actually taken the element out for testing. The problem exists
> with or without the hose from the headlight to the air filter housing, with
> or without the temperature bypass mechanism installed, with or without an
> element installed.
> Any help would be appreciated. - Bob

You should adjust the timing--you need a timing light for this.
You may also need a new distributer cap.
Leaking spark plug wires can cause this problem. Make sure you don't
see sparks when you look watch the wires while the vehicle is on idle.

Did this problem also occur before the tune up? If it started only after
the tune up--it is probably related to a mistake you made during the
tune-up.