The 2001 Pontiac Grand Am 2.4 liter engine PCV valve is located on the firewall. The valve will be on the drivers side firewall in the engine compartment.
On the oil pan.
Open the hood and look straight down on the front of the motor. It is in front of the motor by the fan.
try checking your catalyctic converter
Check plugs and plug wires---worked for mine.
maybe some water stuck in the cylinders
Johnson outboards, model RDS-24L, would be a 1962 year model, 40 hp. the boat motor is a 50 hp.
More than likely 10W30. Your owner's manual will list the exact weight required. * I drive a 2000 Plymouth Breeze with a 2.4L engine. The owners manual recommends 5W30 weigt oil.
You didn't say which engine, but, The 24L DOHC engine is located in the top coil pack cover It is a rectangle shape plugin next to the fuel lines. On an 2.2L OHV engine follow the plug wires. It will be underneeth the coil pack. Either way the coil packs are sitting on top of the ICM....
I have a 2000, I'm sure they are the same..take the four bolts off the top cover (the one that says 2.4 or whatever) and carefully lift the piece out...there are plastic and rubber boots attaching the cover to the plugs.