Where is the pcv valve at the engine ford explorer sport 99

Depends on which engine you have

the simplest way is to follow the largest vacuum line from the main vacuum port

PCV Basics
PCV stands for Positive Crankcase Ventilation.
All car engines have a PCV valve and it is located on top of the motor's valve cover. There is a vacuum line attached to it. It pulls out of the valve cover and if you shake it, you should hear a marble knocking inside it. If you shake it and don't hear anything, it's bad. It costs less than 5 bucks to replace.


Location
* 4.0L is located in the valve cover near the brake booster
* 5.0L is located behind the intake manifold (engine rear)

NOTE-Most people that are asking actually want to know not only where is it but also how do you get at it to replace it.

Often answers say that you need to dismantle the intake manifold to get to it.
This is a major and unnecessary approach, for example, on the 2000 Explorer with a 5.0 V8

Below is an additional suggestion on how to access a PCV valve on an 2000 5.0 V8 Explorer

The PCV valve is on the rear of the intake manifold (the intake manifold is also on top of the crankcase so PCV valve has direct access to crankcase)

To replace valve and/or its bushing:

• Disconnect one battery terminal, unbolt/unplug the PCM cable (Powertrain Control Module connector located on the firewall) and firewall ground connection, depress underneath tab and slide the main cable connector (located to the right of PCM connector) off its mount.

• Move the cables to the right and now you can easily reach down behind the intake manifold to the PCV valve

• Service valve and its bushing if needed, reverse actions to reassemble