Anybody have this?

[protraxrptr17]

When it says "back to the bottle", does that mean back to the degas?
Pic in the next post, sorry.

 

[protraxrptr17]

PIC

 

[G Racing]

Yep back to the degas bottle.

 

[protraxrptr17]

Thanks. If I put on an 06 style elbow on my 04, will just leaving the plug open cause any issues other than a cel? Prolly a newb question. I have stock tunage for now. And egr unplgged? I havent found a definite on that one by searching. Some say the fan will act crazy?

 

[G Racing]

Thanks. If I put on an 06 style elbow on my 04, will just leaving the plug open cause any issues other than a cel? Prolly a newb question. I have stock tunage for now. And egr unplgged? I havent found a definite on that one by searching. Some say the fan will act crazy?

It will mess with the fan. For a tune hit Matt at gear head up
For one.

 

[wetnsloppy4x]

It will mess with the fan.

Yup. That was pointed out by Matt or Eric in another thread. I can't remeber which.

The two are tied in together on the same circuit. Apparently it's not possible to tune around an unplugged EGR in order to get the fan duty cycle to straighten out.

Oh and like they said. Degas=Coolant bottle.

 

[protraxrptr17]

That sucks. What about the flapper?

Can some resistors be wired in place of the egr to fool the ecm into thinking it is still there?

 

[wetnsloppy4x]

I've posed that very question in the past when it came out that the two were on the same circuit. The lack of reponse led me to believe that the tuners weren't willing to put info out there to further bypass emissions equipment. With all the crack downs lately, I don't blame them. That would only be another red flag for the feds.

I would still like to know the answer. I imagine it can be done. I haven't looked further into it though. I'm thinking about changing my up pipes and doing a few other things with my truck this weekend. I might just pull the valve and check it over with my meter to see whats what.

 

[protraxrptr17]

I'm looking at the diagram right now.
Brn/wht- should be Vref which is the 5v reference to the egr position sensor
Gry/red- should be sensor ground
Lt blu/org- should be the sensor signal
Red- should be 12v, looks like it comes from the GPCM, should be jus t basicly a 12v supply. There is a splice (splice 193), that branches out and supplies the fan and the IPR.
Wht/pnk- runs back to the pcm. Should be a pulse width modulated ground to open the EGR valve.

Being spliced into the fan should have no effect on fan operation, but the pcm may screw with it if it doesnt see a certain resistance value or an open circuit. May even go so far as to need a change in sensor resistance when it grounds the EGR actuator circuit. I may just have to be the guinea pig and put in resistors and see.

The EGR position sensor just shows a range of 0 to 5 volts to the pcm. My brain is really tired right now, but there should be some kind of way to wire a resistor into the actuator circuit and branch off of it with another resistor(s) to make th pcm see a change in voltage when grounding the actuator. Maybe with a relay. After I get home and eat my supper, and clear my head, I think I can figure it out.

 

[protraxrptr17]

Just looked thru the dtc list. The actuator circuit is monitored. So is the position of the valve and the performance of the valve. So yes, we must figure out how to make the PCM see a change in voltage when the actuator circuit is grounded. And that change in voltage must be in linne with what the PCM wants it to be. So a relay cant be used. Maybe the best thing to do is just lengthen the harness and put the valve somewhere out of the way. That just is not the way I like to do things though.

 

[protraxrptr17]

All the same applies to the butterfly valve. Ford calls it an EGR throttle.

gry/wht- throttle actuator, Looks like this one works like a power window motor. PCM reverses polarity to open or close valve
yel/wht- throttle actuator, same as above

brn/wht- Vref
gry/red- sensor ground
org/lt blu- sensor signal again, this will vary from 0 to 5v depending on throttle position

 

[wetnsloppy4x]

Being spliced into the fan should have no effect on fan operation, but the pcm may screw with it if it doesnt see a certain resistance value or an open circuit. May even go so far as to need a change in sensor resistance when it grounds the EGR actuator circuit. I may just have to be the guinea pig and put in resistors and see.

That was my guess as well.

Just looked thru the dtc list. The actuator circuit is monitored. So is the position of the valve and the performance of the valve. So yes, we must figure out how to make the PCM see a change in voltage when the actuator circuit is grounded. And that change in voltage must be in linne with what the PCM wants it to be. So a relay cant be used. Maybe the best thing to do is just lengthen the harness and put the valve somewhere out of the way. That just is not the way I like to do things though.

Now there's the tricky part. I'm not a complete dummy when it comes to automotive electronics but I'm not smart enough with this stuff to design that complcated of a setup. Back in high school my partner and I placed in the Chrysler Troubleshooting Contest. Things have changed a bunch since '92. You never used to see circuits tied together in this manner back then IME.

You sound like you're on the right track. Keep up the good work and please keep us posted.