Ford 6.7L Power Stroke Diesel :: Truck Idle / Spool Up And Down When Just Sitting?
Aug 7, 2014
My truck when idling kind of spools up a little bit for a few seconds and then the turbo goes back down. sounds really cool actually. its been doing it since the truck was new, sounds like a plane engine shutting down. It does it over and over sometimes. I just deleted the dpf and unplugged egr last night and now i can really hear it! is this normal....
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So was sitting at an idle in park and truck starts knocking, horrific sound. So shut checked oil, good, went to work came out 8 hours later, started up still knocked. Pulled into drive hit the pedal, knock went away, stopped at red light, knock came back...... Truck has been parked for 3 days, still knocks at an idle but soon as tap the pedal and give fuel it goes away... Tried unplugging injectors one at a time to eliminate, still had knock.
2003 auto, 4wd, studded,deleted, coolant filter, sct with innovative tunes 108,000 miles.
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Having a puddle of coolant under truck after sitting. Shop said its a oring on the egr cooler. 1200.00? Is that normal?
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About 7 months ago my truck started cranking longer than normal to start after sitting for more than 2 hours. This went on for about 3 weeks, then it started normally again. (By longer crank time, i timed it between 5-7 seconds on average. Normal is about 2 seconds). Now it has started doing this again about 4 weeks ago. Now I'm thinking HPO slow leak. Yesterday all is good again. What should I be looking for as a starting point to fix this permanently? When it cranks longer, the icp stays at 0, the ipr goes to 77%. Then it just fires off. No slow build of pressure. You can see all my mods and updated parts in my sig. I wonder if one of the new dummy plug o-rings is starting to give up already after only 15k miles. (Batt voltage is at 13.9-14.2, ficm is at 49.5 steady).
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Truck (04 excursion, 2WD, early build 6.0, 160k) started missing and rough idle on way home from work after sitting all day in rain - parked. started fine in morning and drove to work with no trouble - it was raining over night too.
To get you up to speed. for a few weeks before had intermittent trouble starting. would fire up as normal, fast and loud, but then stall immediately (usually after sitting overnight). would start back up but with a little long on the key and some gas pedal action. only happen one out of ten or twenty starts and seemed to follow getting fuel in unknown locations while on a trip out of town. decided to change out fuel filters and drain separator. seemed to fix it for a week or so then it happened again two days before above event, while weather was dry. Not sure if related but only recent problem to speak of.
Back to current:
- no check engine light or codes (I have a scanner)
- stalled out close enough to home the night in question I rolled it into driveway and tried to start it while rolling in neutral - no start
- once parked in driveway also no start
- next evening wanted to get it into garage (to dry off) and it started but rough idle and missing. this was after 24 more hours sitting in rain.
- been in garage 24 more hours and this evening got it to run but same result (rough idle and hard start). tried to check connections (mainly FICM) and move wire loom around - still same.......
Where to check next, need some diagnostic...
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It started after a blue spring upgrade. my turbo would not spool until we revved the engine hard then it kicked in and it's kinda worked since then.. it feels like the truck is struggling on acceleration and the boost builds fast up to 30lbs, the EBP seems to be stuck at 21.48psi until your in 3rd then it jumps and I have power again, also the turbo dumps (farts) if I let off even a little until the EBP jumps then no issues. I replaced the sensor and it's stuck at 21.48 all the time.
Now, I unplug it and it jumps between 26 and 28psi, plug in the old sensor while it's out laying on the motor (not installed) and right back to 21.48. I don't know where to go with this and it's my only truck so I need it running. also it was blowing the intercooler boot off at the turbo during a normal acceleration and the turbo spool has a howl to it when EBP is stuck...
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While diagnosing a low power and misfire condition on my 04.5, I was measuring coil resistance at the injector connectors. Found 1,3,7 had open circuits for one of the solenoids. 3 bad injector coils and no codes, no contribution codes... Why?
Anyway, pulled it apart to find the spool valves of 1 and 3 came out with the oil log the small bolts that hold them to the bodies had broken off. #7 only 1 bolt had broken off and the other was there but loose.
I got this truck with no history, and Had a variety of issues, like a bad fuse box that caused a no start, massive amounts of water in the fuel, and it had sat for 6 months untouched before I got it. I took care of the previous problems search for my previous posts if interested.
So what caused the spool valve to get blown off the bodies? I'm not sure if these have been rebuilt or ever removed, truck has 135 k. Could it be the water in the fuel that seized the intensifier piston?
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So while driving just now the truck went down to idle and no matter what I did to the gas pedal the throttle would not change. The truck didn't die but would just sit at idle. It was like the gas pedal wasn't connected. About a minute later it surged a little and then I was able to drive like normal.
History- last week while at a red light the engine surged and then almost died. Light changed and I hit the gas....and stayed at idle...then died. Restarted and died two more times and then just drove like normal. Changed fuel filters and and checked fuel pressure. Under boost it was 38-40 psi. Idle it was 45. Cac tube replaced due to cracks.
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Had 3 separate episodes dead pedal on my 04 bone stock 6.0. About a week ago I pulled out on the road and the truck went to idle and would not respond no matter how much throttle I gave. After about 10 seconds it woke up and took off. Had this happen 2 more times this afternoon.
No codes or dash lights.... What this might be? I have a 500 mile road trip this weekend and am worried about being stranded on the side of the road.
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I have a friend with a 2012 F250. The truck has 100K miles and it does idle for extended periods. The other day his check engine light comes on so he took it the shop. They had not told him anything yet, but they did tell him that he had about a gallon to much oil. They said it was fuel.
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I have an 06 f250 w/ 6.0. Having a no start problem. If my truck is warmed up and sits for 5 min or so and try to start it, it starts fine. If it sits longer than that , no start. But if I wait about an hour and a half, it starts right up. Why would it not start if sitting for between 10- 90 min. Starts fine cold.
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06 6.0 f250, I went out of town for 2 weeks came back home and went to jump in my truck and it seemed like it almost started but didn't then slowly each time I tried it seemed like the battery was draining down. Is this just from it sitting for so long without cranking or is it something else my scangauge says I'm getting 11.5 volts. Do I need to just jump it off or get a whole new battery. Or is it another issue?
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2005 Ex with 6.0. It has been bulletproofed. But has had a long crank after sitting for over 5 hours. I was starting to think glowplugs but no codes, Then thinking FICM, nope voltage has always been good. After I run the truck for a few miles if I kill it. It would crank right up. No issues. Only happened after it sat for awhile. I knew it had to do with HPOP system since it took about 5 to 8 seconds to show over 500PSI.
The passenger side does not have a leak since the oil is to the top of ICP sensor. When I was going to remove it. So I took off the drivers side. I inspected the dummy plug. No issues there "they are the 12mm with teflon plugs" I inspected the stand pipe. No issues there either. I inspected the small test port on the top of the rail. No issues there either. So I decided to air test it. So I used my auto-ingenuity to close the IPR valve after I heard all the oil blow out.
Then after sitting with 120 psi of air for about 10 minutes. I hear a bubbling sound coming from the Drivers side Rail. It was a plug I have never seen mentioned here. It is at the back of the rail. I removed it and sure enough the oring is split in 2. I went to ford and picked up a new Oring it was like $4. It also looks like its a different material. I am still in the process of putting the truck back together so i have not started it back up. But I am pretty sure this was my problem.
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Having engine knock after sitting all day or over night with only 4K miles on it until temp comes up to normal...
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Should the upper fuel bowl be empty after sitting for 30 minutes?
I believe no. Which would indicate to me a stuck open injector which Iv been suspected of. Iv been trying to track down a miss that I have and Iv been suspicious of a bad injector but ain't been able to pinpoint which one yet.
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The past couple of cold starts (not real cold mornings though) I have experienced long crank time to start. Once started she starts normally. No time to read but I'm getting a little worried that I'll get stuck somewhere. I'll check back with my phone when I get into an area with cel service.
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I had to drop my fuel tank and as a result, I replaced the fuel lines from the underbed filter to the tank. After replacing everything, I purged, purged, and purged some more. With much difficulty I was able to get the truck running and it ran good. But, I have trouble restarting the truck anytime I let it sit for a couple of hours. It cranks and cranks and eventually fires, but with much difficulty.
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Wtf is going on, Temps are all good, no check engine codes...bad diesel fuel? I had 1/4 tank of diesel fuel when I filled it up...
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I have 97 F250 light duty equipped with factory rear air suspension. Truck has 180K miles. Both rear air bags were replaced about 100K miles ago under warranty (I didnt do it myself!). Both sensors and compressor are new within the last 18 months which I replaced myself. Recently, rear air bags have been deflating when truck is sitting idle. Compressor reinflates air bags as expected when struck is started but recently cannot maintain. Sprayed soapy water today on air bags and airlines and witnessed leak (due to air bubbles) at lower side of air bags on both sides. My conclusion is that air bags are culprit. Seems coincidence that both are leaking??
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So for a while my truck sometimes and sometimes won't go into idle when I floor it and I've been trying to get the code and I finally got it it's tps high voltage so faulty tps??
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My 6.0 with 178k on it just started to have issues today. Low power. When I hit the pedal hard the motor revs and the truck barley moves. When I baby it it goes up to speed and shifts fine. Overall lacking power and not going anywhere. No CEL on. Turbo spools and seems to be ok.
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