When using seafoam through the PCV valve. Which side contains the vacuum? From the crank case of intake manifold? The brake booster line is very difficult to access and on their site it says I can apply seafoam through the pcv valve.
The PCV valve scavenges OIL VAPORS from the crankcase tthe VALVE COVER. Remove it and you will FEEL the vacuum when you put your thumb over it. It will POP the small pellet inside it. Foolow up with GUMOUT srpay and use BOTH to clean the THROTTLE BODY and the IDLE AIR CONTROL VALVE, the IAC is resonsible for mixing AIR with injecte4d fuel. A dirty IAC will RUIN mileage and clog up the converter. GOOD LUCK!!!
On most engines the PCV Valve is located on the valve cover. You would remove the PCV valve from the valve cover but leave it connected to the vacuum hose. Otherwise you would have a severe vacuum leak and the engine would race wildly. With the PCV valve still in place the engine would idle somewhat normally. Pour the Sea Foam directly into the PCV valve. The Sea Foam would be sucked into the PCV valve and into the intake manifold. Be careful not to over do it on the first application. If this has not been done for a few years enough gunk can be washed out of the intake manifold that it can foul the catalytic converter. I would apply the Sea Foam. Have a friend shut off the engine while the Sea Foam is added. Allow the Sea Foam to soak for several minutes and do its job. Reconnect the PCV valve. Start the engine and drive the vehicle for several miles. This will allow the catalytic converter to burn off the gunk that and Sea Foam that has passed through the engine. Repeat as necessary.
Remove the PCV valve from the rocker arm cover remove the hose off the PCV valve shake the valve, is it springy? if yes it is OK put it back on. If not spray the top and bottom holes and shake it back and forth till you can feel it becoming springy Best world I can think of sort of feels like a ball bouncing inside when it's free afterwords spray it till it's clean then dry it and install it bak into position. The hose is the vacuum side but you DO NOT want to get the sea foam into the booster diaphragm or it will damage it, it's made of rubber and ea form will harm it as will any oil or lubricants that gets on it. The PCV valve is a controlled vacuum leak and it pulls engine gas out and recreates it to burn again and it supplies boost to the brake system as well. Hope this helps.
