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VTG is commanded, not actual. Have you checked the turbo connector?
With the original turbo I unplugged the VGT solenoid just to see what it did and it acted totally different. Major turbo lag and a different sound. So to me that tells me it's doing something. Also that was the same time I lost my turbo whistle at idle. That's why I was wondering about a VGT relearn cycle. Or would it relearn its self? Anyways the connector and wiring looks fine to me.
Yes in fourth it will get close to 30psi and yes after it locks up that seems to be the worst. It will spike up to just over 30-32psi ish. Hard to tell at that speed without crashing. Lol.
That's pretty normal to get more boost with the converter locked up. Mine will get to 34psi or so but that's tuned.
Are you looking at a mechanical boost gauge or the map sensor?
This may seem like an odd question at first but you will see why later.
Do you still have the old flex tube in the turbo oil feed?
It could be that the liner had started to collapse and your not getting
dull oil flow to the VGT solenoid. That oil flow opens and closes the
turbo vanes. After all it is really just a hydraulic actuator that moves 2 ways.
If the oil flow is restricted then the solenoid will be slow to activate and travel
the desired direction. This is the one really bad thing about not having any type
of feedback for the solenoid location.
So it worth looking at both the feed and return lines.
2005 for some reason I think you don't have to do any relearn and that is for
the 2003~2004 engines.
When was the last time the EBT tube was cleaned. Maybe you said that and I
just missed it.
With the SCT you should be able to return to stock and then tell it to
turn the EGR valve off. Speaking of you still have the valve still plugged into
the electrical system? That helps keep the cooling fan happy for some odd reason.
Also depending on what SCT you have you can also use it to log data with there
software package. BTW : What SCT programer are you using?
This may seem like an odd question at first but you will see why later.
Do you still have the old flex tube in the turbo oil feed?
It could be that the liner had started to collapse and your not getting
dull oil flow to the VGT solenoid. That oil flow opens and closes the
turbo vanes. After all it is really just a hydraulic actuator that moves 2 ways.
If the oil flow is restricted then the solenoid will be slow to activate and travel
the desired direction. This is the one really bad thing about not having any type
of feedback for the solenoid location.
So it worth looking at both the feed and return lines.
2005 for some reason I think you don't have to do any relearn and that is for
the 2003~2004 engines.
When was the last time the EBT tube was cleaned. Maybe you said that and I
just missed it.
With the SCT you should be able to return to stock and then tell it to
turn the EGR valve off. Speaking of you still have the valve still plugged into
the electrical system? That helps keep the cooling fan happy for some odd reason.
Also depending on what SCT you have you can also use it to log data with there
software package. BTW : What SCT programer are you using?
Yes it's still the old style feed line. I upgraded the drain line but not feed line yet. It's on my upgrade list.
I just cleaned out the exhaust back pressure tube the other day.
The egr is still In place and plugged in just a cooler delete lit was installed.
It's a 04 engine in a 05 excursion if that makes any difference as far as the VGT relearn.
And I'm using a SCT x3 tuner. Ya I might try just returning it to stock and keeping the egr off if possible. Thanks for the help.
I'll see if I can somehow get my dead computer to give me some info.
The 03 04 relearn thing was a PCM thing. So you may not have to worry
about that being a 05 programming. Would be worth asking Mchan this question.
So now I keep getting a code for the exhaust back pressure malfunction. Forget the number but it's a new sensor and I cleaned the tube. What gives. Man this thing is driving me nuts.
The sensor I put in was a standard product. It didn't even have the right threads on it. I just screwed it into the tube. So I just now cleaned my original Ford sensor up and reinstalled it. Right off the bat my turbo whistle is back and it seems more responsive. Could that new aftermarket sensor have been no good from new. That's what I'm thinking. Anyways I'll see how it goes now. Thanks
First off I'd like to thank everybody for the help I've been getting in this thread.
So let's talk EBPS for a min now. I originally changed the sensor to try and help my overboosting which I'm pretty sure is tuning related. The Standard sensor I got had different threads on it than my original which should of tipped me off right away. It came with what I would call a tapered seat type thread like AN or JIC. It threaded right into the tube not into the little bracket my original one was threaded into. The original had 1/8"npt. So I'm wondering if it is for a newer 6.0 or possibly a older one maybe. Either way it was giving me a reading of 17psi KOEO. I didn't know what my original one was at before changing it so I figured it would be fine. Through some googling I've found that they should read atmospheric pressure KOEO (Duh). I'm at around 2000' above sea level out here on the prairies so it should be reading high 13ish. Anyways put the old one back in and sure enough 14.1psi close enough. Boom my turbo whistle is back and it seems much better. With my stock tunes it doesn't seem to overboost yet so I'm going to drive it and see what happens. Fingeres crossed. Just worried about my CEL coming back on for my EGR delete. Anyways thanks again for the help. Learned a lot about my rig in the last couple weeks.
I bought a few cheap ebp sensors,some would be at 17,one at 21 out of the box, went with oem 14.2 then, the one showing 21 would let me build 28lbs boost but lag was bad,the oem almost instant spoolup no lag and 25lbs, no tunes no nothing stock.
I bought a few cheap ebp sensors,some would be at 17,one at 21 out of the box, went with oem 14.2 then, the one showing 21 would let me build 28lbs boost but lag was bad,the oem almost instant spoolup no lag and 25lbs, no tunes no nothing stock.
Yep that's pretty much what happened to me. I should of know better to throw parts at something but oh well. And as expensive as OEM parts are they are usually worth it.
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