Need help identifying an engine part

Here’s the actual EGR strategy from the A9x as written by Ford. We will ignore the “confidential and proprietary” statement and don’t ask questions

This section is 30 or so pages long so I just snapped the most relevant. As you can see, throttle condition is one of the criteria.



APT of part throttle is 0. Idle would be -1 and 1 is WOT. (This is explained on a different page) The only allowable condition to allow the EGR to function is part throttle, otherwise the system self-disables until the 0 condition is met.

More importantly, LOAD is a bigger part of the equation as to when the EGR is functioning. Even at part throttle, as the engine loads up (like going up a hill) the egr is commanded to disable. It would take 5 pages to show this.

In other words, when you need power it shuts off.

Also, just to add. If the EGR is disabled on the A9x, it also disabled “decel fuel shutoff” and “manual trans shift fuel shutoff” from the programming as well.

This doc is almost 600 pages of ECU function.

manicmechanic007 said:

To each his own
I will not be running an EGR valve on mine
Any EGR at anytime is a power loss
Your info is simply not accurate

Click to expand...

Not applicable to the question, we are trying to id the part not debate what good/bad an egr does to performance.

I’m still curious what this part is. I’ve spent a good hour down the Google rathole. My 1986 EVTM is quiet on the 3.8L with regards to this.

I’ll have to check my chiltons. I always felt it was better with the early cars.

@Boss_Stangs I searched for quite a while, not much info on these 3.8 cfi cars, even tried rockauto to see if I could match something, I don't have access to alldata anymore too.
i'll look more later.