NO BOOST
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6th Gear
Joined: May 2024
Posts: 6
Likes: 0
NO BOOST
I’m having an issue with my 2008 F-250, 6.4 Powerstroke. The truck makes absolutely 0 boost, can’t get out of its own way. It doesn’t have any obvious leaks, and the VGT actuator seems to be fine. Using Forscan, I can command the actuator, but it does not operate under acceleration. With a quick throttle chop, the actuator will function for only a second then stop. MAP and EBP sensors have been replaced, MAF sensor has been cleaned. Truck also has gone into a “no crank” issue here and there after unplugging and plugging in the actuator a few times. After clearing codes the truck starts fine again. It gets a P2563 and P2263 code. Not exactly sure how to narrow it down, gonna replace pigtails for the sensors and rig up a replacement plug for the actuator because the clips are broken. Any ideas?
5th Wheeling
Joined: Feb 2024
Posts: 27
Likes: 7
From: Central Wisconsin
Stock? Deleted?
I know my deleted 6.4 will not generate boost in park. Not sure how that actually happens, but I can attest to it myself. Nothing shown on gauge in the cab.
Do you get any codes at all if you don't fiddle with the wiring to the VGT? P2563 is a VGT position fault, but the P2263 is a fault that should only happen under certain conditions and indicates an open charge air cooler hose/pipe or PCM pressure sensor issue.. At least that's what I'm finding on the web.
Do you have any OBD-II software like ForScan? This will help a lot to see the actual data in the PCM. This especially helpful if you did not use Motorcraft parts.
I hate to say it, but it looks like you're going to spend some time in rabbit holes.
I know my deleted 6.4 will not generate boost in park. Not sure how that actually happens, but I can attest to it myself. Nothing shown on gauge in the cab.
Do you get any codes at all if you don't fiddle with the wiring to the VGT? P2563 is a VGT position fault, but the P2263 is a fault that should only happen under certain conditions and indicates an open charge air cooler hose/pipe or PCM pressure sensor issue.. At least that's what I'm finding on the web.
Do you have any OBD-II software like ForScan? This will help a lot to see the actual data in the PCM. This especially helpful if you did not use Motorcraft parts.
I hate to say it, but it looks like you're going to spend some time in rabbit holes.
Thread Starter
|
6th Gear
Joined: May 2024
Posts: 6
Likes: 0
Stock? Deleted?
I know my deleted 6.4 will not generate boost in park. Not sure how that actually happens, but I can attest to it myself. Nothing shown on gauge in the cab.
Do you get any codes at all if you don't fiddle with the wiring to the VGT? P2563 is a VGT position fault, but the P2263 is a fault that should only happen under certain conditions and indicates an open charge air cooler hose/pipe or PCM pressure sensor issue.. At least that's what I'm finding on the web.
Do you have any OBD-II software like ForScan? This will help a lot to see the actual data in the PCM. This especially helpful if you did not use Motorcraft parts.
I hate to say it, but it looks like you're going to spend some time in rabbit holes.
I know my deleted 6.4 will not generate boost in park. Not sure how that actually happens, but I can attest to it myself. Nothing shown on gauge in the cab.
Do you get any codes at all if you don't fiddle with the wiring to the VGT? P2563 is a VGT position fault, but the P2263 is a fault that should only happen under certain conditions and indicates an open charge air cooler hose/pipe or PCM pressure sensor issue.. At least that's what I'm finding on the web.
Do you have any OBD-II software like ForScan? This will help a lot to see the actual data in the PCM. This especially helpful if you did not use Motorcraft parts.
I hate to say it, but it looks like you're going to spend some time in rabbit holes.
Thread Starter
|
6th Gear
Joined: May 2024
Posts: 6
Likes: 0
5th Wheeling
Joined: Feb 2024
Posts: 27
Likes: 7
From: Central Wisconsin
Question for the larger group... can the VGT unit be/remain closed nearly all the way thereby blocking the air to the engine? This could look like no boost because of the 6.4 still having to suck air for combustion and the PCM dumping too much fuel (aka black smoke).
A quick test would be to disconnect the VGT and manually open the turbo gates to see if it helps. The P2563 code would come back anyway.
A quick test would be to disconnect the VGT and manually open the turbo gates to see if it helps. The P2563 code would come back anyway.
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5th Wheeling
Joined: Feb 2024
Posts: 27
Likes: 7
From: Central Wisconsin
I use ForScan, it’s very helpful. Also the EGR is deleted, but not DPF. What is the PCM pressure sensor you’re talking about? EBP sensor tube and MAP sensor were both replaced, which seemed like common problems with others, but the truck still won’t make any boost at all.
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6th Gear
Joined: May 2024
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I’ll check on that later. Also gonna try a few other things. Ended up finding the bottom of one of the cac pipes had a bunch of oil around the boot, and one of the clamps wasn’t sitting straight and was halfway off. Gonna check for blow by and also disconnect the exhaust at the down pipe to either confirm or rule out a clogged DPF
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6th Gear
Joined: May 2024
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Yeah that’s what I found too, it’s the BARO sensor. Everything looked good there, but I did find some odd readings. The MAP sensor doesn’t have enough voltage for the measurement that it’s reading.
5th Wheeling
Joined: Feb 2024
Posts: 27
Likes: 7
From: Central Wisconsin
Why do you think your MAP voltage is too low? You are pulling a vacuum in the manifold from atmosphere. The MAP can go up to 55-60 psi. Not sure of the actual range on the sensor.
I'm more concerned by the EBP_A. That's at the inlet to the turbo. If this was at idle, that's a lot of pressure, and I mean a lot. Likely a plugged DPF.
If EBP_DSD is "display data", ie Boost, it should have subtracted atmosphere from BARO. I'm not finding a good source of info on the EBP_DSD yet. I'll check my truck when I get home. I don't actually see BARO on that pic, but if the BARO is good like you say that would indicate 14.3 pounds of boost.
The difference between EBP_A and I think EBP_DSD is what I refer to as "The cost of turbo" or more aptly the turbo loss. That's extremely hi as far as cost goes. The VGT_MES is saying the VGT is complete closed. That would do it. It's trying to command 2% and is faulted.
I hope I'm reading that wrong, but it looks like a lot of stuff is way off at this point.
I would start with the DPF... make sure the truck is breathing.
Then I would attack the VGT.
I'm more concerned by the EBP_A. That's at the inlet to the turbo. If this was at idle, that's a lot of pressure, and I mean a lot. Likely a plugged DPF.
If EBP_DSD is "display data", ie Boost, it should have subtracted atmosphere from BARO. I'm not finding a good source of info on the EBP_DSD yet. I'll check my truck when I get home. I don't actually see BARO on that pic, but if the BARO is good like you say that would indicate 14.3 pounds of boost.
The difference between EBP_A and I think EBP_DSD is what I refer to as "The cost of turbo" or more aptly the turbo loss. That's extremely hi as far as cost goes. The VGT_MES is saying the VGT is complete closed. That would do it. It's trying to command 2% and is faulted.
I hope I'm reading that wrong, but it looks like a lot of stuff is way off at this point.
I would start with the DPF... make sure the truck is breathing.
Then I would attack the VGT.
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6th Gear
Joined: May 2024
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We finally got it! Turns out it was a clogged dpf. I guess when we deleted the EGR and turned emissions off with the tuner, it wouldn’t let the dpf regen. Seems simple but I guess we were thrown off by the amount of different codes it gave us
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