Ford 6.0L Power Stroke Diesel :: Turbo Surges Faintly While Hot And Cruising At 65 MPH


Apr 9, 2016

Still chasing a surge for some time while cold, mainly. While hot and cruising 65 mph the turbo still surges faintly.. but today was a different story, very fast and high surging from the turbo only, while on overdrive as usual. It calmed down as i dropped the boost a bit but it was quick swings of about 3-5 psi which is quite bad for what it had been doing which was manageable.

Short of taking off the turbo, I took out the VGT solenoid and it had some oil burnt on the end, cleaned that up and pushed the plunger in all the way a few times and it 'seemed' to have worked greatly, until today.

I pulled some other numbers;
KOEO
Map 13.7
EBP 14.1
Baro 28.2

Cold Idle
Map 14.0
EBP 16.5
Baro 28.2

When cold, mainly below 130F the RPM gauge itself will surge or hesitate around 1700-2000 RPM. Any higher or lower it will be smoother I suppose....

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Ford 6.0L Power Stroke Diesel :: Surges / Buck At Acceleration - Gallop / Miss / Stall At Idle?

I've seen the gods of the diesel engine do some amazing things on these forums, so after a year of pulling my hair out, I've signed up to try this myself.

This time least year,I bought a 2004.5 6.0L F-250 with 196k on it to haul around the state for my new business. At this time, I knew nothing about diesel engines AT ALL WHATSOEVER, but I've never been afraid to tackle anything and mechanics are not totally foreign to me. Not to mention, I was hoping everything might just go peach-ily for at least a couple years. (for what it's worth, My dad and his family are mostly shade tree mechanics and I'm a power plant operator so mechanical concepts are not totally foreign to me, just never had a diesel before)

To begin, I purchased the truck and everything was fine for about 2 weeks. Then abruptly one morning I noticed a couple of hefty surges on the way to work. Then, on the way home I thought all was well until about half way home, it did it again! as I was pulling up, it galloped once I pulled my foot off the pedal. like ba-DA-DA-DA-da-da-da-da-da-da-DA-DA-DA-DA-DA-da-da-__ and then STALL! Shaking with concern over potentially an awful purchase, I turned the truck back on only to find... that it's fine?!?? No problems for the next two days and then it happened again. then good for a week, then again. then good for 2 weeks, then again. so then I bought auto enginuity and an edge insight to do some troubleshooting. Let that sink in as I explain it's history a bit.

-All but one injector is ford remanufactured the other is stock (was never told which one)
-replaced head gasket with another OEM
-ARP Head Studs
-EGR delete
-HPOP AND STC fitting both replaced
-FICM replaced
-Oil cooler replaced 50k ago
-ICP and pig tail replaced right before my purchase
- Has been through roughly a handful of ICP's since I've had it (I'll explain)
-I've cleaned the EBP tube a lot and updated it to the newer ford sensor with the flare fitting

-I use Rotella T6 5W40 and CAT ELC-1 Coolant.
-Deltas are under 10 at normal driving
-I typically drive under 2200 rpm until warm then like a banshee at operating temps.

Now one year later, its not fixed, but I feel like I'm close.

The DTC's I have seen are ICP sensor circuit intermittent (I think po2884) and Power Blance contribution failure from cylinders #2 #7 and #8 but never at the same time.

Every time I replace the ICP, it will be problem free for about 6 weeks and then it will return full force (surging and galloping when warm about 50% of the time)

During a possession I see the following:

*Cylinder power contribution test yields no issues at idle or when cold. when "possessed", the whole baseline across all cylinders goes up and all cylinders dip and return at random. none singled out

*ICP voltage fluctuating from ~.6v to 1v (.24 @koeo) *Also during a surge*

*ICP PSI dancing up and down ~600 to 900psi (0.0 @koeo and ~500 at normal warm idle) *Also during a surge*

*IPR% bumps up and down ~25% to 30% (15%@ koeo and 23% at normal warm idle) *Also during a surge*

*FICM Voltage anywhere between 47.5v and 49v

*EBP is normally 15-20 psi

*Boost is 1-7 normal and is not affected by "possession"

These numbers have taken a long time to get since it will only be possessed for about 3-10 seconds at a time and then will disappear for days. The stall has only happened about 5 total times in a year. The surging is much more frequent. I usually get a buck or 2 on any given trip that is longer than a half hour but NOT IMMEDIATELY AFTER AN ICP REPLACEMENT.

On one occasion, I noticed that the ICP PSI actually tanked to about 350 right before the IPR went from 25% to 40% right before a posession. I was driving about 35mph through town at the time.

Here's my thoughts...

- Did that one occasion clue me in to an intermittent HPO system leak causing the truck to briefly over-compensate by spiking the IPR?

- Is my ICP pig tail jobby done incorrectly? If there was a short, wouldn't I see the volts drop to 0? I have another one and will replace to rule it out.

- I have yet to test my fuel pressure, but I figured if it was low, I would have lost injectors by now. (I replace filters probably too often but next empty tank, I'm dropping it and checking the screen and strainers)

I should also mention that I have buzz tested the injectors and I can hear each one clear as day, and that for REALLY long trips, it actually returns to normal. In other words, my window of death is between 30min and 2hrs of driving; invincible after.

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Ford 6.0L Power Stroke Diesel :: 2003 F450 Surges And Jumps / Code P0528 Coming Up

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This past week the truck started lurching while in traffic. I brought it back to the shop and put the scanner on it, and found codes for #1,#3,#5 injectors imbalance and no circuit to the fan motor. Did some research and found low oil and/or dirty oil could affect the injectors, I changed the oil and all filters also removed the EGR and cleaned it too.

I started the truck ran it, stopped, and restarted and let it run for a few. I cleared the codes and did another test. The only code that came up was the Cooling fan P0528 again. I let the truck run. All of a sudden the truck revved up and I could hear the turbo kick in and the engine seemed to take a life of it's own. I did another round with the scanned and found codes for Cruise Control popping up P0565 through p0569 and the p0528 again along with a p1000.

My truck is not equipped with cruise control, but apparently that is what might be making the engine surge. What do I do? What this might be???

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When I tried to start it up, no oil pressure. It appears that the IPR valve may have failed, but I'm curious if the pop was a catastrophic IPR failure or an indication of something else?

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,the symptom that I'm wondering about is that when the truck is cruising at different high speeds like 65 or 75 it starts to jerk/jolt, if I accelerate it goes away, or if I let off the accelerator.

Once I settle on a different cruising speed it does it again. There is no smoke out the exhaust pipe, it does not loses any power, I look at the RPM's and they don't move when the jerking/jolting starts. Truck runs fine except for this issue.

I do get the P0404 and P0405 codes which are for the EGR valve and the sensor. By the way **is there an EGR SENSOR** anywhere on this engine, I seen some posts where people refer to it as the EBP Sensor, is this correct? I cleaned the EGR valve, but it did not do anything to fix the issue. I'm thinking I damaged the valve when I cleaned it, but I would like to verify that this symptom could be the EGR valve before I buy a new one.

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I'm cruising around 55-60 and when I slowly give it gas......No boost. I stomp it and the turbo gauge slowly climbs to about 12 psi. At this point I waiting for the truck to throw a warning message and none came.

As I'm reaching my destination, the speed limit is 30 so I'm just putting along and any acceleration I did, the boost needle wouldn't move. I arrive at the store, and when I got back in 5 minutes later and drove off, My boost was back. Truck operated normal for the 25 minute trip home. I thought a similar thread was started but I couldn't find it.

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I only messed with it for a little while - it's physically difficult bending over inside the van to wrestle with it - and will go back at it first thing in the morning. I know there's gotta be a way, I've just never done this before.

Do I stick the tube in the turbo first, in the engine, or neither until I got the turbo in place?

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2005 F250 SD, Crew Cab, Diesel 6.0L...

Hauling my jeep (close to 16,000 pounds all in F250+trailer+jeep) on a highway going a little over 70mph up a hill when I seemed to have lost some power and the check engine light came on. The turbo PSI was well over 20PSI (according to the gauge in the dash). I have a Scan Boss but I have not been monitoring turbo boost PSI.

I was only 10 miles from the final destination so I continued without stopping. It seemed that the turbo was limited for the rest of the trip. Later in the evening, no more check engine light but I haven't really driven the truck since then.

What do you think the problem was? What should the course of action be?

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Ford 6.0L Power Stroke Diesel :: F450 - Turbo Malfunctioning When Hot

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Before 1600 rpms and after 2200 rpms, the truck has lots of power but withing those ranges, the truck has almost no power at all. When I first got the truck, the problem didn't start until I was up to 1800 rpms. No codes showing up either. I had the truck serviced by a diesel mechanic and the filters replaced using Ford parts. Problem persists and only exists when the engine is warm.

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I will note that I did find a plug for the driver side injectors wasn't plugged in the first time I started it, but I shut it down pretty quick and plugged it in. So then after I noticed the turbo not spooling I used the chip to pull the codes and had a whole bunch related to the unplugged harness and one for turbo underboost. Figured it was because the harness was unplugged so I just cleared the codes and tried again, now I'm not getting any codes but I'm also not getting any turbo boost the only code that it is throwing is the P1000 "on-board diagnostic systems readiness test not complete" do I need to go drive it for the learning sequence because I had the batteries disconnected for a couple days?

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