After removal of the dog house ( inside the the van under the middle of the dashboard ) the valve is on the left side. Careful, do not be ruff in disconnecting the pipe connection as it is easily damaged and will cause you more problems down the road. Damage may not be visible and a bent pipe will cost you 300 to repair.
The PCV valve on a 1999 Bravada is located near the oil filter. It is on the passenger side of the engine compartment.
The EGR Valve is located just below the firewall lip top center of the engine compartment.
EGR valve is in engine compartment, next to firewall, slightly left of centerline when looking at the engine from the front (bumper).
In a 1999 Lincoln Continental : The car battery is located in the engine compartment , on the drivers side of the engine compartment
On a 1999 Mercury Sable : The transaxle ( transmission ) is located in the engine compartment , bolted to the engine
found it
The 1999 Chevrolet Suburban 1500 5.7 liter V-8 air check valve can be found on the firewall in the engine compartment. The air check valve will be on the drivers side of the firewall.
In the engine compartment there is "L" intake valve. It has a green cap with an "L" printed on it. It is located on the left front side close to the headlight.
According to the drawing of the engine compartment in the 1999 Lincoln Town Car Owner Guide : The automatic transmission fluid dipstick is by the firewall , in the engine compartment , just on the passenger side of the engine in the engine compartment ( it is hidden by the engine cover )
inside the engine compartment and on the fire wall
The fuse box can be found in the engine compartment. The fuse box is located on the drivers side of the engine compartment.
On your 1999 Ford Ranger , 4.0 liter EFI , V6 engine : I believe the EGR valve is just to the left of your engine oil dipstick ( when you look into the engine compartment from the drivers side ) The EGR valve is lower down and has a round shaped top