Thanks for the replies. Very helpful!!!
I replaced the PCV valve (with an Isuzu part). Per recommendations of the people on this board, I also used Sea Foam... Added 1/2 can to the fuel tank and 1/2 can to the oil (drove around ~3-4 miles and had an oil change).
Apparently, there is one more place that Sea Foam can be applied: While reading the instructions on the web page for the Sea Foam, it says that "With engine warm, slowly pour 1/3 to 1/2 pint through carburetor or throttle body throat. If vehicle is port injected slowly pour SEA FOAM through direct manifold vacuum line that will feed all cylinders, possible sources are P.C.V. valve or brake booster line". So in my Rodeo, where do I feed this from? The PCV valve?
Any other recommendations/suggestions for the use of Sea Foam through injection would be appreciated.
Thanks!