Ford 6.0L Power Stroke Diesel :: 2005 - Bucks And Surges After Start Up / RPMs Fluctuate
Jul 2, 2015
After start up it bucks and surges, acts like it is starving. RPMs fluctuate. Once it fully warms up and driven a little bit it clears and runs normal. This all began after the alternator went bad and battery warning light came on. Batteries never went completely dead, but could low batteries effect sensors or control module. This morning it was difficult to start, not low battery problem, but a lot of bucking and black smoke. I changed the fuel filters and a little better. New air filter last week when alternator was replaced. No codes have appeared.
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I just got a 2006 ford F250 lariat fx4,and it's already at the shop.. when cold start it has some white smoke, but once I get up to highway speeds the truck jerks and bucks. turbo is putting out normal boost. I've changed oil and filters along with fuel filters. also put on a new serpentine belt and pulley, air filter and have everything cleaned real good. the truck is acting like it's starving for fuel. FICM or injectors ?
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I literally just got this truck 1 week ago. '05 6.0 F250. I have read numerous other threads and have not found an answer. I will start from the beginning.
I was driving on the hwy and once the engine is hot and I am over 55mph the truck feels like it wants to stall. The rpms drop and come right back up. Its like a 'hiccup'. If it starts to act up and I pull over it remains at idle and not stall. Once i get back on the hwy IF I go over 55mph the truck will stall and I will not be able to start until cool.
After doing some reading through the forums I replaced the IPR on the HPOP.
I tested the high pressure oil system. I took off the valve covers and tested both the right and left side individually, with the IPR valve open and close; cannot find a leak.
I took the fitting off of the top of the HPOP and tested with air there as well. I only hear air out of the weep hole in the back behind the gear on the pump.
I took the oil pump off and charged the branch tube with air, no leaks.
I checked all the dummy plugs. They have been already replaced with the upgraded ones and the orings all looked good.
I took the upper half of the standpipes out - look good, orings looked good. I was unable to get the lower half of the standpipe out on the passenger side due to the air box and the driver side only the top half came out when unscrewed from the oil rail.
I put it all back together with 2 new batteries.
I started it, (started cold), drove it 25 miles and it stalled, let it cool down and it started. Drove it 20 more miles and I pulled into a parking lot and I shut it off, and it started right back up 3 times. When it shut it off on the highway I unplugged the ICP sensor and it did NOT start.
It runs fine until I go over 55mph then I am getting the same stall issue. I can drive it around under 50mph and have no issues. I drove it under 50mph and shut it off a total of 3 times and it started back up no problem. If I drive it over 55mph rpm gauge drops and then comes right back up and IF it stalls I cannot start until it cools. Once it stalls out, If I try to crank on it, my IPR is 84.8% IPC - 99-120.
I am using a Scanguage II at idle:
ICP - 18.5
IPR - 585
FMP - 47.5
My FICM Voltage stays between 12.5 - 13.0 while running.
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I've got a slight surge that's very noticeable cold and not so much after warmed, I can hear the turbo surging and feel a slight power increase on and off, checked with forscan the normal values, alls inline, I did not ck fuel pressure yet but will, I noticed vgt, boost fluctuates when this happens, icp ipr readings inline, this is a 04 with throttle plate inside the air elbow area, can this cause a surge and how to test this, I am not familiar with this setup as my 05 does not have it.
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I've had a scangauge on my truck for years and today while on vacation I noticed the voltage was fluctuating between 12.5-13.5 while driving. It has always ran at 13.5-13.7 .... I checked it with a fluke and it is a solid and steady 13.8v at idle. Why would that gauge be fluctuating like that? Truck seems to be running fine.
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Our temps have hit into the -18 to -25 Celsius... I have noticed that on 3 different occasions now that the truck feels like its locked in 4wd when I reverse out of my drive way.My Truck is an F250 Crewcab with 4800 miles
This all started with the cold weather. At first I thought my 2 yr old was turning switches on while he was up front one time, but it happended again the following morning taking my 5yr old to school...
I back up up about 20 feet and then make a fairly sharp 90 degree turn and then all the way down the driveway to the street...its really noticeably on the 90 degree turn..once I turn to go forward it still seems jerky...same as having 4wd engaged on dry surface while turning..
After a little bit of driving it seems to go away...also keep in my mind that the 4wd switch has never been touched at anytime at all...we have a lightly snow packed driveway but my traction is still fine to where 2 wd is all that's needed
Could it be something in the rear diff "catching and releasing" for lack of a better term ?
Locker issues, clutchpacks...?
As I am typing I also remembered making a right hand turn on dry pavement and it felt like the rear end slipped a bit and then caught again, much the same way it would fell as if you hat one tire on a small patch of ice and slipped as ya took off and then caught as it hit the dry pavement...
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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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Starts good cold and hot. Taking off like a grandpa on an evening drive don't notice a thing. Only codes that keep coming up are 2614 and 2617 which are cmp and ckp open curcuit codes and a software incompatibility code for FICM which is due to the updated software in the fresh FICM I installed. HPO pressures are good, has boost, idles smooth, revs nice when in park. New injectors (cause it was running rough especially cold before) and CMP and CKP (because of the above codes and didn't change)and ICP and IPR (last 2 installed because of HPO codes that are gone now with the IPR and ICP). Fuel pressure is 65psi (updated spring). When you step on it while driving it sputters and bucks like it's out of fuel, let off the throttle a bit and it purrs like a kitten. I'm a little stumped. I think it puffs a little white/blue smoke while it bucks.. not much tho. and it comes in little puffs. Took off filler cap and there is almost no blow by.
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i am recently a new owner of a 2006 6.0 F-350. So like any other used rig, it has its quirks. So the one that is bugging me to s the steering. It has been surging hard while driving. It mostly does this when cold. It feels like it's bouncing back and forth then I have to stop and force it from lock to lock. Once I do this it seems to stop it till the next day. I checked the PS reservoir and it's full. The power steering pump looks like it has a slight leak but doesn't seem to be a major issue. The lines going into the steer box are clean and no leaks...
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My 2002 Ford Focus ZX5 has had a low idle (not unsteady) for about a year. Just thought I needed a tune-up. Recently, it started surging and bucking between 40 and 50 MPH. Seems to run fine under acceleration, but then when backing off the accelerator, it starts the surging/bucking. The check engine light is on constantly. A diagnostic pointed to the EGR valve, which I replaced, but it didn't solve anything.
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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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I own a 2003 Ford F-450 Superduty Chassis w/Utility Body. Owned it for the last 2-1/2 years . So far, the only things needing replacement were an Alternator, FICM, and routine oil and transmission fluid as well as filters.
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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My 05 F350 will not start hot, occasionally stalls when hot as well. Starts immediately when cold and runs smooth as silk. Truck has 138k miles on it, I bought it studded and deleted, running 5w40 Rotella T6 with Archoil. Some history on the issue: Started out with a rough idle, found low FICM voltage along with a bad battery. Replaced both batteries and FICM, problem fixed. Soon after developed a misfire with a cyl 5 imbalance and injector code, replaced all 8 injectors which fixed that issue.
About 2 months ago I had a no start problem, turned out to be a bad ICP, replaced that and the harness and was all good for about 3 weeks. That's when it started becoming hard to start when the motor was warm, and then no start at all when hot and would stall occasionally at idle, wait an hour and it'll fire right up!
Ran the air leak test, found a leak on the right bank standpipe, replaced the dummy plugs and standpipes, no start still remained. Went on to replace the IPR and STC fitting which didn't work either. Now it throws a P2285 code, low ICP. Ran the air test again and I don't hear any leaks. HPOP seemed to have good compression turning by hand.
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A few weeks ago, my 09 Sonata V6 starting fluctuating (slightly) abnormally when starting from a cold start. I attributed this to the cold snap (25F mornings down from 40's). To be safe I used a fuel system cleaner at the next fill up.
When the issue didn't immediately go away, I was a little concerned, but extremely busy with work. After 2 weeks of needing to start the car and let it warm up for 10 minutes... things got a lot worse.
RPMs started fluctuating between 2500 and 500. Rev, choke, rev, choke. I got it to the dealer... but it had of course warmed up. Another thread had a similar issue, so I checked for and got an ECM update, reset the adaptive memory, and had the (just due) transmission flush.
No change. The next night, I parked the car in the dealer's lot and let them start it. I suspected the Throttle Position Sensor (TPS) but wanted the dealership to independently confirm. The head mechanic definitely noticed it, confirmed with me, and replaced the TPS, did a carbon cleanout and oil change. So far, 2 weeks later, no issues.
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Don't know where to start so I'll ramble!
2005 f350 with the 6.0. Crew Cab, 8' box, 4x4 with DRW. I use it only take the boat to the launch 5 minutes away once in a while and to pull car trailers every other week. Majority of driving is on the highway and average trip is about 300 miles. Low power and now no start.
No codes. I do have a scan Gauge and can provide data.
Was running this week, but has had a lack of power for some time. I had put 2 new injectors in last summer. Also updated dummy and stand pipes. Blue spring. Also new IPR at the time.
Ficm board was replaced in March.
New injector harness last year. New Glow plug harness last year.
Coolant level is fine and none being lost.
CAC hoses appear fine, no cracks.
No boost. But newer MAP sensor, hose not cracked or plugged and nipple on intake is clear. Put the MAP sensor last year and it didn't make a difference.
Turbo was rebuilt 2 years ago.
IPR has to hit close to 80 before boost hits 12-15. But it takes a while to get there.
Now won't start.
Yesterday am it was about 30 farenheit and no start. Last year would start no problem.
Batteries are fine. tested.
Engine fires within 3 seconds, but doesn't want to run.
ICP is above 500. climbs as I turn over.
Fires only in first few seconds and then nothing while I keep cranking it. it is cranking fast enough though.
Now...I see IPR will hit 84.7% and then 14.8%. Not good!
When running it sits in between.
FICm voltage is 48.5 key one and 47.5 when cranking.
Wondering if possibly IPR screen is plugged? Or would CKS or CPS cause issues? I recall reading about pulling one of them and cleaning rust off of it? Also...should mention, no EGR reading on scan gauge..never was either. I had checked and cleaned egr valve before. it was clean when I pulled it and not sticking.
Intake had been cleaned 2years ago. Also, on occasion, while pulling up hill, I would get power! Black smoke and it would race up a hill like it's supposed. Then it would go back to no power.
Also...if I pull the MAP hose from the intake nipple, should I feel suction from the intake? There doesn't appear to be any air coming or going from the nipple.
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I have 2005 f350 with 365000 km on it I have it for one year and don't have a problem till last week. I was pulling van on dolly uphill and sadden lost pover, so I stopped and check oil leaks ,transmission .... But everything looks ok in couple minutes start engine and go home (10 km). Change fuel filters trans filter, looked good for 50km and star losing power again and doesn't want start. So I skan and its show me next numbers.
Key on engine off
Ipr-15%
Icp-0psi
Icp-.26v
Ficm main power-47.8
Ficm logistics power-14.5
Ficm sync is good
Engine crank
Ipr-85%
Ficm main power-48.0
Ficm logistics-12.5
Icp- 625psi
Icp-.77v-1v
So what I have to do?
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Where can I send pcm off to have checked out.
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Brother in law company 6.0 died on him in his driveway after a night of plowing
It stalled out, his boss sent out a "tech" and he said it doesn't have "nearly enough" oil pressure
Now I want to further diagnose the truck myself with my scan gauge II but haven't used it for that......yet......
What should I check for IPR pressure psi or %?
I know I can get ICP pressure in PSI on my SCT x4 not sure about the Scan Gauge......
I assume a blown IPR or failed STC fitting......
Truck is a 2005..... I can figure out the scan gauge I just need to know what to look for for an idea of a blown IPR or STC or ICP.
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05 6.0 will only start if I cycle the glow plugs, crank 3 seconds shut off glow again then it starts immediately. If I try to glow 2 cycles with out cranking it won't start either. When he truck is hot it seams to start easier. I have new batteries new alternator running 5-40 synth. New glow plug control module. It does it hot or cold weather.
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My truck usually starts up great, but every so often it takes 3 to 4 long cranks before it will start. By long cranks I mean more than 4 or 5 seconds of turnover. Seems to be no real rhyme or reason to this. It does it engine cold or hot. I have iPhone engine monitor app and numbers seem fine. BTW it's a 2005.
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I have a 05 with 100K miles on it. I had the HPOP, FICM and EGR delete do about a year ago. Went to start the truck pressed the pedal and it died and won't start. It dies once while driving about a week ago but restarted. I have a Snap-on scanner for the data. FICM tested good and getting fuel to secondary filter. Batteries and filters are new with about 2K miles on them. Would this data point to a bad IPR?
ICP V KOEO = .25V
ICP V Cranking = .28V
ICP_DSRD 1251 PSI Cranking
IPR Duty 15% KOEO
IPR Duty Cranking 85%
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