EGR valve and air temp sensor

[Riddler250]

I love sea foam!!!!

[redneckgearhead34]

I love sea foam!!!!

Is sea foam available at autozone or something of that sort.

[Jaxom]

Advance and O'Reilley both carry it on the shelf. Sea Foam is great stuff.

Big Apple...The 4.6L trucks are notorious for clogged EGR passages. If that's what he has you'll need to pull the intake plenum elbow off the top of the engine to clean them out, as they generally clog where the passage enters the main airflow ~4" behind the throttlebody. The DPFE sensors on those trucks are known for going bad also, and that can cause an EGR code too. The DPFE is sometimes called an EGR position or EGR flow sensor.

Redneck...I've never seen an IAT go bad in a Nissan pickup, every one that I've repaired has had broken wires at the sensor connector under the air filter housing. This is normally cauused by someone pulling up on the filter housing without knowing the sensor is there. Sometimes the wires break inside the insulation and you can't tell just by looking at them. The EGR code could be a bad valve but it's unlikely. Most of the time a vacuum hose is broken or the control solenoid is bad.