[bmasencup]

I asked this question a long time ago and never got a reply so trying again. This is one of those projects that just keeps getting pushed out, but I am ready to get the exhaust put on and get all my O2 sensors installed. I have a '99 5.0L from an Explorer. My setup is a READ0 strategy on a EEC-V PCM. I have looked through everything related to EGR and I cannot find a scaler to disable it. I can probably change some of the limits to trick it into not operating, but I want to hook up the analog output of my wideband to the EGR input on the PCM for logging with QH. I have looked at a few other strategies and the EGR disable is obvious, but I can't find it on my strategy.

[ATPCR]

@bmasencup Did you find an answer to your question?

[cgrey8]

My guess is you'll need to contact the person that sold the READ0 definition to you. Even if one of the resident bin hackers could give you the offset details for how to disable it, you wouldn't be able to modify your existing definition to display it and let you modify it. Add to that, if you've already made significant changes to your tune, you wouldn't be able to modify the tune in its encrypted form. You'd have to go through some fairly detailed steps to extract your tune in an unencrypted form, modify it manually using a HEX editor, write your tune back to the hardware, then upload that modified version of your tune using your definition file so that setting would be set in the background for that version and all future versions of your tune moving forward.

Another detail worth looking into. Is the DPFE EGR signal a voltage based signal or a PWM signal? If it's a pulsed PWM then you may not be able to use that input for a Wideband anyway. I don't know of any variant of Ford EGR that was ever PWM but that doesn't mean they don't exist.

[ATPCR]

@cgrey8 I would think that bmasencup acquired the READ0 file from BE seeing as the other "camp" doesn't have a developed xdf to go with the READ0 bin file. Just a guess though. bmasencup hasn't been back since I asked him if he found an answer to his question.
ADDED 1-13-26: Even though EGR wouldn't have been required in 1965 on my Mustang in my location (state), (I'll be using a READ0 controlled '99 Explorer 5.0) I'm glad that someone asked this question before I was to get ahead of myself and delete things off of the engine that may need to stay in place. I want everything to function properly, and the check engine light NOT come on because of hardware deletions. The only physical situation that I could anticipate is in my case, the fitting of some of the EGR components to either tri-Y headers or the mid '60s 289 HiPo exhaust manifolds.
In the old 1964.5 to 1966 Mustangs and Falcons, there is not much room between the shock towers and exhaust.
Thank you, guys, for letting me comment on the original OP thread. cgrey8 insight is helping me think this through before any physical work takes place!

[cgrey8]

If you are using an Explorer 5.0L and you WANT to retain the EGR, then it's worth knowing that the 96 Explorer 5.0L came with an 89-95 "sonic" style EGR that pulled from the intake and used a EGR position sensor. The intake elbow was specifically designed to hold this older style EGR and supply the EGR from the intake.

The 97 model changed the EGR to a DPFE style which uses a tube with the DPFE sensor and taps connected to that pipe to measure differential pressure in order to calculate EGR flow. The EGR valve itself is significantly smaller with a completely different bolt and mounting surface pattern. As a result, the elbow on 97-2001 5.0Ls is different and designed to work with this era EGR. My 97 Explorer's upper and lower intake (and even the GT40p heads) had the EGR provision, even though none of it was used. Somewhere around 98-99, the intakes were modified to no longer have the EGR path in the castings.

I know all this because I reverted my 97 5.0L to use that 96 Explorer elbow so I could use a Mustang sonic EGR since my engine was being controlled by an 89-93 Mustang (GUFB) EEC which only uses sonic. My aftermarket FMS Explorer headers have the EGR pipe provision that my setup no longer needs, so I used a couple of solid-copper pennies to block them off with.

Point being, if you found that there were fitment issues with the DPFE, you could revert the system back to the older sonic era. I think the 97 Explorer EEC strategy retained the logic and switch for setting the EGR for sonic. I suspect that got dropped by 99 when the EEC went from a 2-bank to a 4-bank, but I'm speculating...I don't actually know.

But as you said, you don't need the EGR. So you can just turn it off in the tune and block off your intake and exhaust ports.

[ATPCR]

My 96.5 Merc Mountaineer has the "sonic" type of EGR. That is the vehicle that I converted to coil -near-plug using "Godzilla" coils and a Crown Vic pcm with 8 coil drivers. It is working extremely well. I haven't consciously thought about being able to swap some parts around between the two engines. I'll have to take a closer look at my '98 5.0 engine that is an early '98 with 3-wire camshaft position sensor and dual return fuel line setup. Early next week, I'll look and see if it has a DPFE on it. FoMoCo made some mid year changes which is not uncommon for them. I have collected some parts from a '99 Explorer 5.0, 2-wire camshaft position sensor and injector rails from a single fuel line and white injectors with the return inside of the tank and a READ0 pcm. I just need some 3-bar non "P" or E7T heads to use in the early Mustang body for now, the "P" plug angle won't work for me. I'm using one of the two early Mustang exhaust manifold/header options.
Side comment: I try to stay away from the 1997 2-bank pcms seeing as they aren't "writable" and kind of a first year "one off" deal. But I was able to read one recently.
Thanks for bringing that to my attention. Maybe the info might help the other guy bmasencup!
ADDED 1 hour later: I'm going to have to think about this a little more using the '96 sonic EGR with READ0. In the morning on a fresh brain, I'll break out my BE dongle/key and look around READ0