Quote:
Originally Posted by MPDano
Is this documented somewhere? Or did you test this on your car?
|
Blowing air into your exhaust system cannot make your car stumble. The smog pump blows air into the exhaust to aid further combustion of the unburned gas, and all of this is taking place in the exhaust. It's not like an EGR valve where you're putting exhaust back into the intake side. Now if the diverter valve is bad and it's causing a vacuum leak, then that could cause a stumble.
Valve 9 is a one way check valve, it's to keep the hot exhaust from flowing back into the diverter valve and burning it up. The check valve is back between the firewall and engine block on mine. To check, disconnect the hose between 8 and 9, when you start up the car there should be no flow coming out of 9. In fact, due to the venturi effect may actually have a little suction present, so have someone blip on the throttle to make sure you don't get any flow OUT.
In ok, out bad.