[reekor]

With a good scan tool you can check voltage of most sensors.Carbon is a normal product of burning petroleum. Their will alway be some carbon build up in any engine, the first gen 4.6 have very small openings in the EGR channels and this is why they tend to plug solid. After the engine reaches operating temp the opening of the EGR depends on engine load. The EGR passage is at the intake, you do not remove any exhaust parts or the EGR to clean them.

Originally Posted by [email protected]

Thank you for the info.

The way I understand it is the solenoid connected to the ERG is an on off deal that determines if there will be any sucking and the PFE determines how much due to conditions like acceleration.

The flow of the Gases is not smooth like cigarette smoke going out a partially open window or too much to handle a fault will occur.


Service for for both units is the same and the first thing to check is the hose to see if it is not clooged and to make sure Garage exaust isnt removing to much of the exaust . I have no garage and the hose was clear so I figured it was the PFE.

It is almost impossible to check voltages at the connector so im going to strip a little casing of the wires where I can get to it.

What I cant seem to undersatnd is where the soot comes from. If the on /
off solenoid is closed until operating temp then any soot at start up would go out the exaust and not into intake.

After a stop for gas say.. Car is at op temp. on/ off opens like it should
but PFE is wrong and sending a signal that is too high or low so a big dose of that soot is going in at an RPM that wont suck it through? If ya make a lot of stops shopping thats a lot of soot.

I intend to clear the passage when I get the balls to mess with a rusty connection at the exaust. When I get them I will also attack the rusty lines on my steering gear to stop the leak at the seal. No balls on e bay

Good luck