You should hear the valve operate during the KOER test. If the test completed without any codes, it should be working normally.

 

[quote=Pikachu;14577992 Have a look at MAP sensor voltage in AE and see what it says.[/quote]

AE reported MAP/BARO low input when I first ran it. I have since cleared everything. I do not find MAP as something I can monitor in AE.

V 5.4

 

It's not under Manifold Absolute Pressure? I know it's in there somewhere, but I don't remember exactly what AE lists it as.

 

Yep, under the "Live Data Meter" tab select:

Manifold Absolute Pressure
Barometric Pressure
Exhaust back pressure

They are the top three in this photo:

In this example my Exhaust Back Pressure sensor was bad. They should be within .2-.4 psi of each other with the "Key On - Engine Off" on a cold engine. That way they are all reading pressure at a relatively close temperature to each other.



Are you sure you have the Ford Diesel Bundle? When you connect to the OBD port are you given the option of the 7.3L engine? Just making sure.....

As Pikacha said, when you run the KOER test you should hear the EBPV being activated. First the idle will kick up a bit and then you will hear the exhaust sound change to something like an oversized leaf blower (as the EBPV is closed).

The EBPV is controlled by the PCM if I remember correctly. It will activate when the oil temp is low - so you might want to monitor oil temp as well on the live data meter tab to see what temp the PCM is seeing.

Do you hear the exhaust sound change during the KOER test? Are you getting the message that the test has "successfully completed" or is it just timing out? Either way, AE should pop up a message to let you know whether or not the test was fully completed successfully.

 

they should read something like this:

EBP, MAP, BAro & oil temp

 

Standard Pressure at 3,300 feet elevation should be around 13.0-13.1psi. So the numbers for all three of your sensors should be close to what your MAP is reading.

 

raydav: I got nothing to offer but speculation (I haven't been online for awhile and WhiteBuffalo pm'd me) but RushN350 has some good suggestions. Current over or through a restriction can make sounds like you describe for sure.

Current can be air in or out: For inlets, the van air filter clamps are horrible and will subject your turbo vanes and then piston rings and cylinder walls to dusting if the filter box is torqued out of shape and leaking or clamps are missing and it is leaking. The CCV also provides an air inlet which is attached to our air inlet pipe behind the air filter and before the turbo which could conceivably leak and make a sound. For exhaust: Check for soot at the up-pipes (take your dog house off and take a picture and post it). We also have a butterfly valve as part of the EVBP system on the outlet side of the turbo. If that were to stick closed or partly open it would probably sound like a reed instrument. (That is also very accessible with your dog house off. And you can even take off the downpipe and look inside at the butterfly valve to see if it is not fully open.) I don't know much about our van turbos, but my guess is that a misaligned, dusted or bent vane or a vane with a missing tip on the air turbo inlet side could make wierd noises. (In fact, would "pulsing" be another name for "surging," and doesn't surging constitute a variation in power?) (Again easliy viewable with the dog house off and disconnecting the turbo air inlet pipe to the turbo and looking at the vanes for missing tips or dusted ragged edges.)

Current can also be liquid, like fuel. The van has a steel tank which is prone to delaminate sending paint goo flakes to the in valley fuel filter. I know it can clog the in valley fuel filter but I don't recall a sound when mine got clogged (take the fuel filter out and take a picture of it and post it). Some FTEers have also had a problem with algae gowing in the diesel fuel and clogging everything up. Paint goo or flakes or algae could also clog the pump inlet screen (nonserviceable) and maybe you could hear that scream or pulse depending on the amount of restriction as the pump clogs and then macerates and then passes the goo in the fuel on to the in valley fuel filter (the fuel pump is on the frame rail under the driver's side door). This would also likely cause less or more fuel pressure with a resulting change of power?

[For my horror story take a look at:
https://www.ford-trucks.com/forums/1...fuel-tank.html

You may want to record a video when the sound is occurring and post it in Youtube for these engine gurus to hear and comment on.

That's it for me. A whole lot of worthless internet speculation (in comparison with those who actually know what they are talking about). But I do know this, to help deepen the knowledge pool further, us other van guys would really appreciate it if you would post your results when you determine what it is.

 

Wow Tim, you might have just hit the nail on the head. Turbo surge - Ray, does it sound like a pressure cooker when you hear that sound? Pssst.....psssst.....psssst.

You might even catch the MAP sensor fluctuate on the readings. You can see it on a boost gauge flutter.

Still need to get those sensors straight......

 

On another note, you have a doghouse - so unlike most of us you can better see the EBPV operate during the KOER test.....there's an actuator rod at the base of the turbo pedestal that open & closes the EBPV.

 

The engine selection is greyed out. I told AE what I was working and this is what they sold me. So, time out.

 

I'll PM you my phone # , see if I can help you activate it.

Rich

 

Click the help tab and select "feature activation"

is the "enhanced Ford Bundle" highlighted green and listed as "activated" or yellow highlight and "not activated"

I sent you my cell # in a Private Message - feel free to give me a call if you need help trying to activate it.

 

A couple years ago my on-engine filter got clogged with what looked like black silicone that had been softened buy fuel. That happened on the road and forced me to abort a trip. I have since added a Racor R26S, with a settling bowl, before the supply pump.

I have long had one on my 98 IDI van. And last evening the fuel filter light came on anytime I got on it hard. So I know to check/change the filter, BEFORE it causes an operational problem. The 89 system has a vacuum switch before the filter. I took the filter off the engine and put a Racor on the frame with the supply pump, but kept the vacuum switch. The 2001 will tell me there is water in the filter but not that is starting to plug.

I will see what I can do about recording the sound, but think howl not hiss.

 

Based on the description I'm with Rich's (WB) first diagnosis, fan clutch engaging due to higher temps. It's only happened on mine while towing the 5er on hot days in the desert up a steep grade, I had no idea what the noise was either. It's a subdued whoosh, maybe 60% of the volume of the EBPV. Starts as a continuous whoosh as it draws ungodly amounts of air thru the radiator, then the 1 second cyclical sound as the temps improve. There is a small power loss due to the fan engaging but again, nothing like the EBPV. My understanding is the PCM monitors EOT, IAT and Trans temps (ECT instead of EOT on a stick) and when all meet some value the fan clutch is engaged for additional cooling of those systems. So monitoring the ECT and dash trans temp will not give you any clues. If you can see real trans temps and EOT and IAT, that should show you something.

It's a feature, not a bug.

But if it's happening now under same conditions as before something in the cooling system is not up to snuff. If coolant level is good I'd check the radiator fins for obstructions. IIRC someone here posted pics of their radiator with a ton of small debris that accumulated over the years, resulting in lousy cooling. You could barely see thru it. Something of a pain to pull just to look at it, but so is monitoring EOT and Trans and IAT and recreating the symptom.

My dos centavos.

 

I monitored EBP, MAP, BARO, RPM, Trans temp, converter clutch, and three trans solenoids.

I started at about 3K feet. Key-on-engine-off (KOEO), MAP and BARO were about 13. EBP was about 17. After driving a bit KOEO EBP was about 15. For the rest of the drive EBP tracked MAP but about two pounds higher. I got them into the low twenties.

On an uphill from 2K to 4K, traffic slowed which caused a downshift to third. The pulsed sound then started. I locked out OD, maintained about 60MPH to the top of the hill, lifted, EBP and MAP dropped back to 15/13, pulsed sound did not change. Continued driving for a few minutes in third, sound remained, unlocked OD, trans up-shifted, sound stopped.