Ford 7.3L Power Stroke (1999-2003) :: 2001 - Code P0720 Only On 4 - 6 PSI Launches
Jun 13, 2016
2001 7.3 Excursion, full mods in sig line.
Recently started getting a P0720 for OSS on 4-6 pound launches, and the X will lurch and then stall out. It drives fine when I drive like a normal person, it also launches fine at 8psi and up (obliterates the tires in the process). Little curious as to where I should start looking beyond the usual culprits on checking the connector for corrosion and verifying the sensor itself is clean/still good.
Stupid thing drives like a peach everywhere else except the 4-6psi LAUNCH ONLY range. Normal driving through that pressure range is absolutely fine. 4-6 is the only problem child area.
View 9 Replies
Advertisement
So just got a new pcm installed since i fried the last one anyway. I had a new trans installed almost two weeks ago factory 4r100 now i have a p0720 code. Id take it back to that dealer.
View 8 Replies
I have a 2001 F250 Super Duty with a 5.4L engine, regular cab. The truck has 149000 miles on it. I bought it about a month ago and had the transmission rebuilt, the spark plugs and coils replaced. Apparently the shady dealer I bought the truck from had power washed the engine and there was water in 3 of the spark plug wells on the drivers side. When I got the truck back from the transmission shop and backed it out of the parking lot, the OD off light started flashing and the SEL light came on. The code showed to be a P0720 to which the mechanic at the transmission shop replaced the speed sensor on the top of the tranny.
He said if it comes on again then the speed sensor on the rear differential could be the problem and that he would have to charge me to replace that sensor since it isn't covered under the warranty for the transmission.. I replaced the sensor myself on the rear differential yesterday and thought the problem was fixed. I drove the truck around for 30 minutes with no problems, until I put the truck in reverse, then the OD off light started flashing and the SEL light comes on giving the same P0720 code.
View 4 Replies
I've had a CEL for awhile so I final had it checked. It is the P0605 pcm memory error. He cleared it to see if it will come back. There isn't any chip or never has been a chip in it as far as I know. If it does end up being the pcm, what are my options? can it be repaired? Do I need a new one? Can I get a used one and if so what are the criteria I need to look for, for it to be compatible?
View 6 Replies
I have a persistent issue with the OD off light flashing on my 2001 7.3L auto 4x4. Scanning it with AE I get the P1832 code. The truck runs and drives just fine. It shifts nice, goes into overdrive, locks up, etc. If it weren't for that blinking light I'd think it was all perfect. I've checked all the connections, replaced the range switch / neutral safety switch, replaced the VSS on the rear axle, checked all light bulbs and fuses. I've checked MOST of the relays in the truck.
I pulled the tranny drain plug and poured out a bit of fluid into a clean pan, it looks and smells good. AE also tells me that it's not communicating with the ABS system (although there's no persistent ABS warning light on the dash), the Airbag, the Overhead Trip Computer, the Parking Aid (which I don't have...), or the Enhanced Powertrain. The temperature on my overhead display is reading -40F which is clearly wrong.
I've looked for a comprehensive wiring diagram for the truck, but can't find one. I'm trying to figure out if there's a connector or module that these various functions go thru that might be the problem. Am I missing a ground somewhere? The frame was just powdercoated......am I not getting a good ground connection? In complete disclosure, I have torn this truck apart and re-assembled it out of several different trucks as outlined in this thread.
[URL]....
View 8 Replies
I have a 2001 f250 7.3. Recently started this problem idling at 1000 Rpms when stopped completely and when I let off the gas pedal it idles real funny like it's fixing to run out of fuel. It does not do this all the time however. At times it runs great. I had my mechanic scan it and at first it was the exhaust pressure sensor. Replaced it and it ran fine for awhile and it started doing again. Took it back in to get re scanned and it was throwing a bad ICM code. Replaced this as well and I'm still having the same problem. Had it scanned again and it's not throwing any codes now. I have no check engine light on and as long as I'm on the gas pedal it runs great. It's just when I roll up to stop or when I'm stopped completely. Again it does not do it all the time.
View 9 Replies
Alright I have a 01 F250 with the 7.3L in it. Recently had the turbo rebuilt and all the surrounding gaskets changed as well as boots. All this was done around 1,000 miles ago. Runs great and I don't see/feel any issues, no white smoke anytime, little black when I turn up the tuner and really ride the thing but normal driving none. Problem is I have a pending P1247 code that after a few days will throw a CEL... I'm not sure what the problem is and have been searching the forum and people are mostly saying they get it but the boost drops or there isn't any at all and the truck my stall or bog down. I don't have any of those problems. Turbo spools up to whatever I want and I've never had it stall or bog or even get close... So what should I check? Also new to the site and diesels.
View 14 Replies
About a year ago, my airbag indicator light threw a code 47. It did this for about two days, then it stopped. Fast forward to this weekend, and it started again. From what I can tell, it is the passenger side seat belt pretensioner. It could be a coincidence, but my daughter pulled the seat recline lever without anyone being in the seat, causing it to fly forward as if James Bond was ejecting someone through the windshield. The next time I started my truck, it was throwing the code. I tried to check to see if the plug was knocked loose during the ejection sequence. I thought the connector was under the passenger seat, but I don't see any wiring (the passenger seat is manual). My next guess was behind the glove box, but I'm not sure what I'm looking for.
My truck is a 2001 F250 4x4 Lariat.
View 2 Replies
I have searched and found a few threads of folks getting a p0720 code and truck revving and dying. Just wondering how to resolve the issue and what the cause was. I have an 01 ex with v-10
View 13 Replies
My hyundai 2004 sta fe awd 3.5 LX engine light came on while cruising dwn the freeway. At the same same time i heard a loud thud and speed went down from 65 to 40mph and a high idle. I drove it home and hook up the obd2 scanner and got P0720 suggesting bad output sensor. So I decided to buy new sensor from the dealership, put it in and thought it will fix the problem. After few days the engine light came on (P0720)again with the same clunk noise and speed down from 65 to to 40 mph at high rpm. Took it home, did some experiment by putting back the old sensor. I Connected the harness back, but this time I wrap the female connector with the electrical rubber tape and electrical vinyl tape. Problem fixed. No more engine light,transmission shift smoothly. I think the connector (harness side) to the output sensor was crack that's why its not making good solid connection. The rubber tape technique held the female connector pins tightly together. New part didn't do anything but it was a learning experience.
View 1 Replies
I have a 2002 F250 SD V10 4x4, that just started to randomly misfire [does not matter if the vehicle is in motion or in park]. I scanned the OBDII and found pending code P0720 (Output Speed Sensor). The CEL, O/D light, nor the ABS light illuminate. The speedometer functions normally.
This occurred Saturday after we got 12-18" of snow. I cleaned out the driveway, took a short drive (~ miles) & parked the truck (no symptoms). Later we went to 2 stores and then on the way home, the misfire started. The next day the misfire continues.
I have been searching & come up with the same posts that say the issue is not the OSS. It's usually a bad COP or bad wiring @ the OSS. The symptoms are not the same as when I had a COP go bad (only misfired under load between 1500 & 2500 rpm).
Personal issues: My truck does not fit in my garage, it's dark (and usually below 30 F) before I can get to look at it in the evening. Also, we are supposed to get another foot of snow tomorrow night.
View 12 Replies
Here's the story. Truck has showed no signs of rough running. Wife drives truck around town. Truck up to temperature and doing fine on a 90 degree day. Stops at red light. Makes left turn engine light comes on truck seems to be running on 4 cylinders. Pulls over light goes off engine idles perfect. Pulls back on road light on no power. Gets truck to a local friends house lets it sit til I get off work.
I check for codes get p1316. Drive truck toward my house no problems for 4-5 miles then does the above with me. Limp it home. I know it is pointing at a wire problem to injectors and or IDM. Did a buzz test passed fine. Plan on pulling valve covers and looking for the usuall things. Any thing I am missing? What will a kOEO test tell me? Should I run one? How common is IDM to go out? One last thing just put a rebuilt transmission in it 3 days ago may be unrelated it seems to be doing fine.
2003 f-350 cc 7.3.
View 11 Replies
As I was getting ready to leave town with the tractor loaded up, I was accelerating with the turbo spooling up when I heard a bit of a pop and lost power (engine still running and all, just very low power like you get when the turbo fails). I wasn't far from the shop so I came back and started getting a lot of white smoke out of the exhaust, it doesn't smell like diesel, probably more like oil. Definitely smoke, not coolant. I pulled it around back and shut it down to go grab AE and scan it and it shows a P0475, starting it back up has light smoke at idle and it idles fine but as soon as you give it any throttle it starts smoking pretty badly.
Researching it looks like the most likely cause for this is the EBPV itself but before tearing it down that far. This is the only code it's showing.
Truck has 272k on it, turbo was rebuilt a couple of years ago but we didn't do anything with the pedestal at that time. I guess in retrospect, I probably should have done the EBPV delete and the resistor fix then but I didn't think about it at the time.
On another note, my AE is not showing any of the system test for some reason, the drop down is blank. I have version 7.0.1, so it's an old version but I'm working on an old truck, so... What that might be? I've got the truck pulled into the shop now to let it cool down. I'll probably let it sit overnight and take the turbo and EBPV out tomorrow unless someone has a better suggestion...
View 14 Replies
I have a 2000 F350 7.3 4x4. It began giving intermittent tow/haul flashing light, when going up or down hill but would clear and drive next time truck was cycled off/on. No ABS lights and code reader generated P0720 for the output speed sensor, now I can get it to generate just driving slowly fwd and rev a few times. All of this has been in the last few days.
Truck will stall if I take it up a slight incline with the fault. I replaced the sensor on the top front of the 4r100 transmission and also replaced the sensor on the rear differential after giving up on looking for an output sensor on the transmission. I know the 2WD transmissions have an output sensor but is there one on the 4WD version? I have read several past threads discussing the P0720. I am hoping to confirm what sensor I need to be looking at and where it is located in this application.
View 14 Replies
What do I do? Do I need a new IDM?
View 3 Replies
Truck was towed into my shop for no start. Mechanic diag as hpop pump. He is no longer here. R&R hpop with thourobred reman pump. Truck still a no start. only code is for EBP. Spacer is behind tin nut of ipr. Starter spins motor as it should. No blown fuses. WTS light works. No oil in icp or ipr sensors. GPR voltage is good. Tach moves when cranking. Disconnect ICP still no start and has 65% duty cycle. IPR has 500-1000psi the first 2sec of cranking then it drops and fluctuates 180-480. Add direct power to ipr and get 660psi the first 2sec of cranking then drops
View 9 Replies
Just got the transmission rebuilt in my truck and other then shifting hard sometimes it has been doing great, Hooked it up to the goose neck this evening and everything was fine then went to back it up and pull it forward and after a short distance the od light was flashing and when i ran a check on it it was p0720? The transmission has less then 1000 miles on it?!?!? 1999 Ford F-250 7.3 Automatic....
View 5 Replies
I disconnected the red wastegate hose in order to address a low boost high EGT issue. This seemed to fix the boost / EGT issue for the most part, but now I get this P1249 code. The first time I got it I saw boost at about 20 PSI. I figured I would try to keep the boost below 20 in an attempt to prevent the code.
I managed to capture some log info when throwing the code. The highest boost reading I saw was 19.58. Pretty close to twenty but I question if I even should be getting this code at this level of boost?
Here's a chart with the boost info. Yes I still have a very bouncy EBP and hope to track that down at some point as well....
View 8 Replies
I went and got my truck smog and it failed because of this code. I then changed the sensor cleaned out the tube and I still can't figure out how to get rid of the error code?
View 3 Replies
Cranks but will not start. My issue started with a MIL code P0108. I clear the code and it pops right over and runs great. MIL will re-light within 15sec. No trouble runs fine until I turn it off. On re-start try, MIL 108 is on again and will not start until MIL codes is cleared. I have been using an Actron CP9185 for scanning and to clear MIL light. (A new GEM mod. installed at the dealership, their call due to a wiper issue.)
Based on forum info have replaced MAP,CPS, ICP, and IPR. Battries are relatively new 13.9V. ( Bought an Auto Ingenuity and am not to impressed. Apparently 1999 is only partially OBDII compliant. It will not find the PCM on first go for a KOEO test. Once I start it it will connect and list values. As yet I can't make it do a buzz test.
On a separate note I found a link that says Ford MAP sensors use a digital signal ie Hz opposed to analog. 12/89 and older engines use a Barometric sensor in the cab 12/89 and newer incorporate it in the PCM? I wonder if this is something a parts house might have missed and the analog MAP signal fried my PCM???
View 10 Replies
Wife put fuel in my truck drove it home and as soon as I started it back up it was running rough as hell. When I got to the freeway it got real rough at 1500 rpms in overdrive. If I bring it up over 2000rpm it's better but still feels rough. When I got off work and started it up I got the p1316 code.
I did some research tested plugs on the valve covers a few pins were over 5ohms so pulled the valve covers did the 50cent mod to shimm the under valve cover wiring harness. All pins are around 3.5 ohms. It did not fix the problem.
I then dropped the tank thinking maybe the pick up was gunked up. I've read all the horror stories about the delamination in Ford tanks. Good news is that I have a plastic fuel tank. Bad news is the screens though dirty weren't dirty enough to cause my problems. Where should I go from here?
View 1 Replies
