Ford 6.0L Power Stroke Diesel :: Fluctuating Idle / Surging And Stalling - ICP Bad But Not Leaking?
Jun 24, 2015
So any ICP sensor been proven bad but i was not leaking oil? The symptoms of my truck sound similar to a bad ICP...fluctuating idle, surging, stalling, but it does run and start. IT tends to start acting up when it hits operating temp.
I have an 04 and the ICP sensor is in the easy spot to get to on the valve cover vs under the turbo (that's awesome) so its an easy swap. but just wondering if there is any way to test it over simply swapping it. I do not have a monitor yet but a dongle is on order and will get the torque app for my tablet.
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I replaced the exhaust back pressure sensor and the readings on my sct programmer didn't change at all so I don't want to keep blindly throwing money at it if one of you has experienced this and found a cure. The interesting thing is it never throws a code or check engine light or anything according to my sct. Doesn't even show that the egr valve is unplugged. I have read that it could be a bad turbo, vgt solenoid, icp, throttle positioning sensor, or a couple other things.
It feels like I'm the front car in a bump draft in cup racing when I'm at a steady speed. The truck has arp head studs, new style egr cooler with the tubes, coolant filtration, new oil cooler, new ficm, blue spring, all filters have been changed in the last month.
2004 powerstroke surge/ rapid idle - YouTube ...
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I was driving my 2011 the other day home from work and experienced a rough idle. Normally the truck idles pretty smooth. I noticed when I was driving at highway speeds the truck seems to shake a lot. I pulled over and turned the truck off. I did a walk around and could find anything out of the ordinary. I started it back up and no more rough idle. However while i was driving at freeway speeds I could feel a momentary lack of power, then the truck would regain its speed. This would only last a sec or two.
I figured I'd give it a few days.... well now its gotten worse. Its doing the same thing but a noticeable difference in the lack of power. I still have boost pressure and the turbo seems to working fine. Im trying to figure out what it might be. I'll be taking my truck into ford again...
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Just bought a 2006 F250 with 6.0. A week or so ago, it surged once at idle at a light. Sort of felt like someone bumped into your rear. It has gotten more frequent over the last week or so. Now it does it often. It tends to rev up and then back down again over and over. Then it will clear up again. My brother said his 7.3 used to have a similar problem (as did quite a few others apprently) and it was the Cam positioning sensor (CPS). Where is it located?
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A few weeks ago i had a surging idle issue very intermittently, and it went away for a while so i stopped thinking about it. Just got back from a weekend in vermont, about 130 miles each way, and i noticed as soon as i got to vermont and came to a stop sign it was surging, and when i just got home it was surging again. Why would this have picked back up after long stretches of running for a while? Runs great as far as i know, just have this surging idle for some reason.
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My 6.0 stalls out when under load above idle intermittently. When it stalls, if I release the gas pedal and tap it, it usually catches again but not always. ICP is strong and doesn't seem to waiver when it stalls. Engine runs much better when oil comes up to about 180. Oil / water temp spread about 5 degrees.
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What could be causing my turbo to be fluctuating while accelerating? I can definitely hear the difference in the sound of the air and today while towing my camper I could even see the dash gauge bouncing around some.
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I have a 1999 f450 7.3 diesel that surges and will stall but will start right back up again and drive. It does this over and over but all ways gets back to the shop. The engine starts good when cold so glow plugs are working correctly. What I have done:
Fuel filter change, check electric fuel pump but have not replaced it. I have replace camshaft sensor.
What I have found d by inspection:
Throttle pedal has 2 electrical connections one for the IVS and one for the TPS. I have experience on the 7.3 IDI diesels but very little on the newer injection system.
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Truck Details:
2004 6.0 F250 extended cab.
Mileage: 1,162,000 Kilometres (the dash stopped at 999,999)
Egr is deleted.
Motor has approximately 120,000 miles on it.
The previous owner delivered campers with it. He said that almost everything in had been replaced except the transmission.
I've had an intermittent crank, no start since I've owned the truck. (2.5 years) It's only happened maybe 5 times and the second attempt was always successful....until yesterday morning.
It threw a few codes but none I believe related to the no-start. One code for a transfer case issue, one for a turbo under-boost, one for the ac clutch not communicating, one for the exhaust pressure sensor not communicating. I would list the actual code #'s but after the first scan I reset them due to my ignorance.
While cranking I get the following numbers:
FICM LPWR- 11 to 12.5 volts
FICM MPWR- 47.5 to 48.5 volts
ICP v- up to 1.8 volts
ICP pressure- up to 1493 psi
IPR %- 15 to 55%
No FICM sync
No ckp/cmp sync
RPM- 0 to 60 and fluctuating
FUELPW- 0.00 ms
I've checked hertz across the red and orange wire at the centre plug of the pcm while cranking and i believe it tested good at 1.4 hertz. The batteries are both getting old and I plan on replacing them but the voltage seems adequate.
The following Forscan tests all checked out good.
PCM KOEO
PCM KOEO injector electrical
TCM KOEO
There were a few others but I think they're irrelevant and they checked out good anyway. I've visually inspected for chaffing but I need to look harder still. There were definitely no codes regarding the cpm, ckp or ficm. Based on what I've read, the fluctuating rpm reading should point to something I'm not aware of.
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I have a 2000 Excursion with the 7.3L. We bought it in February of last year with 81,000 miles on it, and it has 111,000 miles on it now.
First problem:
It threw a code today: P0683 indicating a communication issue between the Glow Plug Control Module and PCM Communication Circuit. Other than the code, the truck isn't doing anything out of the ordinary today. Drove it about 40 miles, up to 80 MPH, problem three below did show it's head once, but other than that it ran great.
Second problem:
Ever since we've owned the vehicle it has done a strange surging/near-stalling thing (for lack of a better word) when it's started up. It only does it occasionally, and the problem seems to appear, and then go away for several weeks or months only to reappear. Here's how it goes:
- Start truck
- After starting the truck immediately begins to surge (rev?) and then nearly stall.
- It will do this over and over, about one surge/near-stall cycle per second, until I tap the accelerator, at which point it stops immediately. So far it has never stopped on it's own, but has always stopped with a tap of the accelerator.
Up until recently I chalked this up to "huh, that's weird" since the truck has otherwise run fine.
Third Problem:
Every once in a while the truck will hiccup while it's up to speed. It only seems to do it at highway speeds, typically between 55-70, and the hiccup typically only occurs once.
The first time I distinctly remember it happening was right after I had replaced the Camshaft Position Sensor (approximately 5-6 weeks ago).
While digging around online I found one other guy say his truck started doing the same thing after replacing the CMP in his F250 with the same little plastic gray one I used. So that problem might be caused by that part.
My Thoughts:
It seems like the run-away favorite for fixing problem one is to replace the GPCM. I've dug through a couple hours of forums this afternoon/evening, and it looks to me like the GPCM is the culprit the vast majority of the time when code P0683 comes up.
I'm thinking problem 2 might be an ICP issue. I can't find any previous forums anywhere that describe the exact issue I'm having - or really anything very close. Maybe it's out there, but I couldn't find it. So I'm really grasping at straws.
Problem 3 could either be related to the ICP (if problem 2 is an ICP problem) or it could be due to the new CMP I installed (the cheap gray plastic one from Autozone). It's possible the hiccup has been around longer than I think. Half the time when it happens (or does it?) I can't decide if it was a hiccup or a bump on the road I didn't see. I am sure it's happening at times, but there are other times I'm not sure if it was a hiccup or a bump I just didn't see. So I think it's possible it's been going on longer than I realize, and I noticed it that first time because I had JUST been under the hood and pretty finely attuned to how the truck was running as a result.
I'm about to hitch my 35' camper to this truck and haul it a few hours and I'm not feeling real confident right now. Problem 1 hit today, problem 2 is more prevalent than every right now, and problem 3 has been hiccupping for 5 or 6 weeks. I'd like to get at least problems 1 and 3 sorted out before hauling 8,000 lbs if possible.
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Just replace the b solenoid in my transmission last night; everything running good now, but for some reason it started doing this weird thing where if I come to a complete stop at a red light, then ease into the throttle, it will start surging,bucking. If I give it a little more gas on the pedal it will smooth out though. It only does it if u ease into the throttle after a complete or near complete stop. What's going on?
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I have a 6.7 diesel extcab longbed 4wd with the 3.31 rearend. I have been experiencing a surge primarily told by the boost gauge when using the cruise control unloaded and either or both going up a steady climb in elevation or headwind. It does not surge if I shift down to 5th. Does not occur pulling a load. Still occurs in manual mode and tow-haul mode. Does not occur if your controlling throttle with your foot. I find that it happens at speed of 65-70. It will boost to about 10 pounds then fall to about 3 and will continue this until maybe a hill or change in direction. It does not occur with a tail wind. I took it to the dealer today and ford had a new flash for the pcm and the tcm. Hoping that this would fix it but I don't believe it did.
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I'm getting some light surging while under acceleration. None at idle or once in overdrive. I cleaned out by exhaust back pressure although it wasn't really that dirty. Thinking about replacing the sensor anyway but it is a little pricy to just buy for no reason. Should I look for anything else? And where I'd the best place to get one? I've seen the 20 amazon ones or over 100 at the parts store.
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I have a 2007 f350 6.0, just replaced the oil pressure sensor in January, now, my truck is surging like crazy! I heard it could be the ICP sensor, how easy is this to change? And where do I find it if this is the problem!
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Last night pulled in at rest stop and truck started surging then stalled put dieselkleen in and topped off tank but no luck eventually would not run at all. Had it towed to ford and this morning started right up running fine. Having them change fuel filters. Not sure what to do got to get back to drive?
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I was wondering about same turbo problems that I'm having? When running in cruze only at 55-60mph the turbo will surge from 2-12 psi up and down repeatedly. It sometimes will level out for a couple seconds and then continues to do it. I had it to the dealer and the service manager drove it and said it seems like it's searching for something, but since there was nothing from ford about it he couldn't do anything about it. There was an update for a prior serial number but my truck has the current software. What kind of damage is this going to do. It sucks because alot of my driving is at this speed.
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My '03 7.3 is "surging" on idle. When warmed up, and idling, the RPMs will drop by 300 or 400 for a few seconds and then will correct and shoot back up. It cycles like this (every 5 seconds-ish) continually . I just put in a new IDM and checked the UVCH - is there a separate idle control mechanism that I need to have a look at? (2003, 7.3, 214K, stock).
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I have an early 99 F-350 with 268K miles. It is bone stock right down to the factory exhaust. A couple months ago I started have a rough idle and surging while driving problem. I never got a check engine light but I borrowed a scan tool from a friend and pulled the following codes: P1690 (wastegate solenoid), P0381 (glow plug circuit malfunction), P0269 Cylinder 3 Contribution/Balance Fault, and P0284 Cylinder 8 Contribution/Balance Fault.
I did some research and everything I read said it was most likely the CPS. So I changed the CPS. The truck ran fine for for a few days but then it started acting up again occasionally. I noticed that most of the time when it acted up was at start up when the engine was cold and I also figured out that if I shut the truck off and re-started it (sometimes I had to do it 2 or 3 times) it would clear up and run normal.
A buddy of mine that has a 2000 F-250 said he had a similar problem with his truck and it ended up being the ICP sensor. We switched his ICP with mine and I changed my oil at the same time (because it was due for an oil change). My truck ran flawless for over 2-weeks (over 200 miles) so I put a new ICP in my truck. Note: my buddy did not experience any problems with his truck with my ICP in it.
I've put about 700 miles on the new IPR and the truck has started to act up again. Once again shutting the truck off & re-starting it will clear it up and still no check engine light. I took it to a local "diesel specialty shop" while it was running rough and they hooked it to their scanner and got P1280 (Inj. Control Pressure Low), P1690 (Wastegate Solenoid Fault), P0381 (Glow Plug Indicator), P0269 Cylinder 3 Contribution / Balance Fault, and P0284 Cylinder 8 Contribution / Balance Fault.
They never did anything other than hook it to a machine & check the codes but their diagnosis is my High Pressure Oil Pump is going bad and my #3 and #8 injectors are going bad. They recommended I let them replace all 8 injectors and the High Pressure Oil Pump. The problem I have is they can't give me a REASONABLE explanation as to why re-starting the truck a few times clears up the problem.
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A few weeks ago I got in my 2005 EX and started for work. As I idled in traffic, the engine started surging (it had never done this before). So I took it right to Ford and dropped it off before it got worse. Of course, they couldnt look at it until Monday (this was a Thursday), so I had to get a rental.
I get the call on Monday that the surging problem was an injector, but covered by my warranty. But, it seems that my EGR cooler was bad, but even more important was my blown head gasket.
WHAT?! My truck did NOT have a blown head gasket when I dropped it off. But thats besides the point. There was much back and forth between Ford and my warranty company, but finally I got them to cover the head gasket.
But, I had to pay for the EGR cooler. So I asked the Ford mechanic if I could supply him with an upgraded cooler, so I wouldn't have this issue in the future. He said no problem. I then told him I was going to buy a Bulletproof and he said no, get a delete kit. He said "I've done a number of these, and its really the best solution.". He even HEAVILY recommended the ADT Delete kit. He even said that since I have a 2005, we can just leave the EGR valve hooked up and I wouldn't have a CEL issue.
Fast forward several days. I picked up my EX last night and... CEL is on. I called and spoke to the mechanic and he told me that I must have an upgraded program, and that my only option is a tuner to turn off the EGR completely. He also told me that I don't need an expensive SCT or Bullydog just for the EGR.
Anyways, with all of the above setting of the stage complete, just wondering what my best option is here... Is there a simple/cheaper tuner I can use to just disable the EGR? Is it worth the money to get a more expensive tuner? For the most part, this is my daily driver and I don't need a performance or towing tune. I wouldn't mind better mileage, though
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Ok I have a 2004 f250 6.0L, has 104k on it. A little back story... truck was running well when I started to get surging on takeoff and it was blowing black smoke when it surged. After it hit 1600 rpm it would blow out and run normal. So did some research and found it could be the FCIM, I have the 4 pin and tested it and had 48.5v so it tested good. Did some more research and found symptoms leading towards the ICP so I replaced that and the ICR also.
Upon doing this my surging issue cleared up but now I'm getting a miss around 1200 + rpm weather it's in park Reving it or driving, but it is not throwing any codes, I did check with my code reader. I have also changed both fuel filters and have the EBP sensor on order as I hear they can be troublesome. My question is what should I do next or look at? I was trying to avoid the dealer so I can learn more about the truck in diagnosis.
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I've been noticing some weird, very subtle engine sound changes while driving at highway speeds lately. Something almost like surging, but not. I don't know how to describe it. I might try to make an audio recording next time I take it out so I can explain it.
Anyway, I don't know why but ICP popped into my head. Maybe, for some reason, the engine was varying ICP causing the surging sounds.
So I hooked up AE and did a test. I've attached a screen shot.
With my idle speed actuated as high as it will go, and ICP actuated as high as it can go, I can only get a pressure of about 1450 PSI. I always thought ICP should go higher than that. I seem to recall reading somewhere around 3600 PSI.
So am I misinformed, am I reading the data wrong or do I have a problem? How high should Injector Control Pressure go? I missed it in the screen shot, but ICP is actuated to 100%.
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