Ford 6.0L Power Stroke Diesel :: Speedo Reading From 50 Mph Up
Jul 26, 2017
Yesterday I noticed when I parked my truck the Speedo was reading 10 mph. I drove around a bit and used my GPS to get my real speed which was 10 under what the Speedo read. I parked the truck for the night and in the morning nothing had changed, I drove for a bit and all the sudden the Speedo worked like normal.
Later that say the Speedo got stuck at 50 mph and now when I stop it reads anywhere between 50 to 60 mph and goes up from there. When I'm doing 30 mph it'll read 80 to 90 mph. Cruising on the highway it reads well over 100 mph.
I've done some reading and it seems like it either the cluster or a speed sensor. My cluster has had a lot of problems lately of not working at all, no gauges work, radio turns off and the Windows don't work but a good slap on the dash will fix that most of the time.
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What the problem is with my F-350 6.0. I have an intermittent problem with my Speedo reading zero while I'm doing 70mph on the fwy. since the speedo won't work the truck goes into limp mode, the turbo will not function at optimum level. I have replaced the diff. sensor, the trani sensor, the a.b.s.sensors, the instrument cluster to a reman cluster. Then when I had a local mechanic plug a laptop dianostic program on it as he was running through the system inadvertently the radio cut out, so I found that who ever installed the after market stereo they cut a few wires to the harness, I went to the junk yard found the harness end and replaced the end. so with all that said and done no one knows what is causing this speedo not to work and limp mode. about 4 years ago the oil pump stopped working and ruined the turbo so the whole front end of that glorious 6.0 was rebuilt the problem started about a year after that.
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So i had been up in the woods for better half of the day. I had been in 4wd a few times, didn't thrash on anything and while driving home about 30mins into the return trip on the pavement i noticed my speedo only showing 10mph. I know i was easily going 50mph. I changed my SGII gauge to show MPH and sure enough i was going way faster. Eventually the needled dropped to zero and stayed that way for at least 5 miles. Then I came to a stop to and made a right turn giving it a bit of throttle and the speedo began to work correctly and did so for the remaining 5 miles. the Odom also during that time wasn't adding mileage. could this be from the rear sensor ontop of the rear diff?
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I recently bought this Ford F250 6 with 117k... I've had it 3 weeks and it is now at 120k... My Odometer is reading Fast. From Tucson to Phoenix it read 302 mi, on my trip monitor it read 102 mi.. I've made this trip many times before and 102 miles is about right. It's a big issue because I get paid by the mile.
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I tried searching here for a pid to get oil pressure. Can't find it. Is it possible to get oil pressure readings on these motors? I assumed it would be because we have a dummy oil pressure gauge on the dash. I thought it would be in the pop up list of gauges on Torque but I didn't see it.
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I'm just curries as to the highest millage on a 6.7. I have a 2011 and only 36,000. My 7.3 had near 300,000 when I sold her and the engine was still running strong. Wondering if the 6.7 has that same longevity.
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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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The oil and water readings on my SG have been gradually climbing for the last few year to where they are about 15* above the ambient temperature after sitting over night. My question is could the values for the other readings be getting high. For instance going down the road at 65mph my ICP was 1250 and my IPR was 62.
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Just changed the fuel filter in my '04 6.0, no issues worked just like normal, filter primed truck started, great. Well now my fuel pressure gauge is reading dead 0, I know that can't be right because the truck is running, but noticed my fuel mileage seems about 2 mpg lower all of a sudden. Had R&R Injectors installed about 40k ago, figure it's just a bad gauge but wanted to check and see before messing with the frickin wiring. Also, have had a lot of pressure buildup in the coolant tank, has had head gaskets and studs, anything else it could be besides head gaskets? Have had a lot of wiring issues with this truck from the previous owner....
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I have a 2003 Excursion 6.0. I didn't post this in the 6.0 section because it may not be just a 6.0 issue. (See what I get) On cold starts, anything under 150 degree water temp reading on the SGII. I get a CHECK GAGE light on accompanied by the check engine light. No codes read on the SGII pending or stored. Just some of the time I get a water in fuel light too. This tends to go out fairly soon after driving. (Even after I just drain the fuel pump it still happens.) other issues that accompany the lights are as follows.
The trans temp does not give a reading to the dash. The oil temp does not give a reading the dash. Both show proper temp on the SGII. When in reverse the back up alarm beeps as if something is behind me. And the auto door locks will not activate after 10 mph. The tach also will not show a reading in the dash. SGII shows the numbers. Now the kicker, this ALL gets resolved the instant the water temp hits 150 degrees. The only lingering issue is the that the tach will surge or drop every now and then. The tow/haul light does not come on when this is going on. I've checked the battery terminals all are clean. Both batteries are brand new.
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2006 F-350 6.0. I have an intermittent problem with my Speedo reading zero while I'm doing 70mph on the fwy. since the speedo won't work the truck goes into limp mode, the turbo will not function at optimum level. I have replaced the diff. sensor, the trans sensor, the a.b.s.sensors, the instrument cluster to a reman cluster. Then when I had a local mechanic plug a laptop diagnostic program on it as he was running through the system inadvertently the radio cut out, so I found that who ever installed the after market stereo they cut a few wires to the harness, I went to the junk yard found the harness end and replaced the end. so with all that said and done no one knows what is causing this speedo not to work and limp mode. about 4 years ago the oil pump stopped working and ruined the turbo so the whole front end of that glorious 6.0 was rebuilt the problem started about a year after that.
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Ok so the saga is continuing, not sure if its because enigma hates this mod or if I shorted something out when I was cutting the wires and mistakenly touched the ends together (protected terminal ends) some how or the monitor piece is just old and the fact that it has been my previous truck and this truck for a total combined 8+ years causing this conundrum....anyways the gauge seems to work (yay?) but it looks to read only "8"DC V?? but I know the power port (in dash) works as expected....so I am a bit lost here....one of the digits does look to be faded out as if the device perhaps is going bad and needs replacement....
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What else besides a sticky plunger, would cause the fp reading to be all over the map. According to my gauge, I'm at 78/79psi at idle, but can see it dip to 70ish or spike to 90 while using our driving. My cv's are removed, fp reading is pre-filter and wiring seems good....
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2000 7.3 EOT read 272* with engine cold new Ford sensor only getting 3.95 volts at sensor plug and at the 42 pin connector from PCM should be 5 volts, dropping 1 Volt some where I disconnected all the sensors that share this voltage IAT, EBV, ICP, IPR, MAP no change. I left the EOT unplugged and the truck runs good I'll run it like this.
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Just bought this 1999 7.3 drove it a couple days now and got to walmart today. shut it off to go inside and came back out. turned on key waited for wait to start to go off. cranked the motor over but it didnt fire. i tried it again and nothing. oil is full, oil pressure is good while cranking. no rpm reading on gauge while cranking. no check engine light. batteries are literally brand new two weeks ago. Cam sensor?
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I've had an ongoing issue with my fuel gauge reading incorrectly, and now I'm trying to fix it! Basically, it will change all over the place while I'm driving (not erratically, but definitely moves occasionally). I recently fixed my overhead display, but the "miles to empty" display doesn't seem to be very consistent. It will read 450 miles to empty, and then the next time I look at it, it will have dropped 100 miles or something (after minimal driving).
So I'm wondering where I need to begin looking to fix this problem. I've replaced the dash cluster using Circuit Board Medics, so I'm fairly confident that's not the issue. I've read that it can be the fuel pump or the fuel tank sender, but how to check if these are actually the problem or how much time it will take. Luckily, I've never run out of fuel and been stranded, but I need to fix this or it's only a matter of time!
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I have an 02 f350 7.3 power stroke...Yesterday I noticed the outside temp was reading wrong,it was jumping from 67 to 86 to 92 back to 67..Temp was prob around 90 with high humidity and my a/c was on..So I got to where I was going and when I restarted my truck to go home the fuel gauge dropped to empty(I just fueled the day before) and fuel light came on and outside temp still wrong on the overhead digital display...Are these two things related???
Stopped the truck restarted it and fuel reads correctly again....Went out today and fuel light back on and on empty...Outside temp wrong again,a/c is on .....I disconnected the batteries when I got home to "reset the system"if there is such thing, fuel gauge working but outside temp wrong..?? Where is the outside temp sensor ?could condensation be running onto the sensor and throwing off my temp gauge? Just strange that both these things happened at the same time......I don't think its a fuse or they wouldn't work at all. I should mention all the other gauges work correctly...
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Started today. 2004 with 235k miles. Owned for last 10k miles. Engine was recently studded, has egr delete and ccv bypass. Runs and starts fine. New Ford oil cooler too. Checked for codes. None for misfires, perdel are reading 0.
If it sits, on start up clear exhaust, as it warms, more blue smoke. Smells like oil not diesel.
Researched before asking and found leaking turbo seals can cause this. So we pulled the intercooler tube in front of the engine going to the intake expecting to find oil residue. Nice and dry. Was this the correct one to look at?
When we got the truck we had the dealer do a relative compression test and was within limits, it did need 1 injector that we replaced. What would be the next logical place to look?
Couple more points:
- Just changed oil last week, checked today, it was slightly over full.
- Coolant is fresh and has not changed level since we got it.
- Pulled fuel filter to see if any oil, but it was nice and clean.
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I filled up at the same fuel station I've filled up at for 6 months, never had a problem. I just bought a 6 liter and put some injector cleaner in on the last fill up. Ever since then, it's been running really rough and missing when cold, and even when it's warm if I really lay into it, it'll pop and sputter. The fuel in water lights been on since I bought it. I think I have a bad sensor, because it was running fine until I put that cleaner in. Since its been running rough I put in new fuel filters and drained the fuel water separator, which only had fuel in it. I don't really know what it could be, but I'm 99% sure it's an injector issue since it started only after I put fuel treatment in.
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It only happens on a very Rare occasion.
When Cold, and when I start out as I open the throttle, it suddenly sounds like there is not a piece of quieting stuff on the engine. I mean its like I can hear right into the engine itself.
I back off, It goes away then I dont hear it again for another Month or two.
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Keywords: Diesel fuel, tank capacity, 26 gallons, fuel tank, capacity, false advertisement.
On my 2012 F250 with 19k miles I have NEVER been able to fill tank with more than 22.4 gallons of diesel fuel. That was the day I ran out of diesel going to fill up thinking I had 26 gallons. Once the light comes on I'm filling up, I have every tank fill DOCUMENTED with (date/cost/gals/trip/$per gal).
Talked to local dealer Raleigh, NC , their explanation was fuel pickup was raised to prevent contaminates from getting into injectors. They advertise 26 gallons, should be able to access 26 gallons.
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