Clint - I have a (stock) 03 7.3 RWD AT XLT Crew cab that had water intrusion into the fuse box/BCM. I got forscan lite going while troubleshooting an IDM/FICM failure, a year or two back, and worn engine wiring harness, but had never looked at barometric pressure using it. More recently, I found and solved water intrusion at the cab corners, (until I can get a good donor cab truck,) and am waiting on a new fuse box/BCM. Tne water was making my radio turn on and drain the batteries. I a,so replaced a leaking IPR sensor. Concurrently, but likely coincidentally, The tach, and trans temp guages stopped working, and the only codes stored were a PCM keepalive failure, and low injector pressure, immediately after, which have not come back since clearing them, after reconnecting the battery and runnning the truck. The IPR sensor seems to be working fine, but the check gauge and engine icon lights now stay on, with no codes stored. The important question, for you, is my forscan shows no barometric pressure, just reads zero for any barometric pressure value I choose to display from the PCM. I assume this means a failed PCM, and the guage issue may or may not be related. I repaired my cluster for having the problem with the battery saver relay, in the past so am comfortable checking the relays in there, and replacing them or just remelting thermal stress cracked solder joints. Truck runs better since the IPR sensor replacement, but seems to have decreased fuel mileage despite a much needed alignment, which makes me think it is due to the lack of baro data. Going to try to get a rebuilt cluster, if my own simple troubleshooting does not fix the tach and trams temp. (Fuel, speed, and oil pressure read OK, and I have a bad temp sender as a known issue...) and will replace the PCM as I can afford to, but am hoping you can (or someone,) can confirm that I SHOULD be seeing a barometric pressure reading from the PCM. Thank you, or anyone.
Thanks much appreciated I've been blessed 2220.000 miles bought new in 03 7.3 I keep her up but time to give her some Luv rubbers,hoses,elec con. Ex Thanks
As always great INFO I know how much I have learned and boy it beats watching the spin shows with the phone cam videos no wonder all they do is upgrading hahahah no real wrenching great job brother please keep it coming
Thank You Sir , i appreciate Ya for the info , & yes i aint learned jack chitt from any forums , i have a 97 f 250 HD , I JUST ORDERED A VSS , my ABS light came on speedo went crazy, shiftin not right either ,i changed it with an aftermarket i vss, a couple weeks ago, so i put the old one back in it , but the ABS lite came back on , but nothin acted up. my auto trans dont shift into OD Or lock up , usually run 2k at 70, have change TPS with after market part , with no luck , same ol same ol , im asume not goin into OD, will kill my fuel milage , but im goin to change my Baro sensor , & hope for the best .
Thank you for all the information you put together and put out!! I have a question regarding baro results. My Autoenginuity scan tool is giving me a max baro psi reading of 148psi. The voltage does show fluctuation based on what seems like changes in weather. (last night it was 4.55volts and this morning it was moving between 4.3 and 4.2) I don't really know how to actually test the sensor but I'm curious if the scan tool is picking up a max psi of 148 if it is using this information to feed the PCM. I pulled the protective cover off the sensor to find the sticky gel that is protecting the sensor and touching this sticky material will effect the voltage and I can get the psi to finally change if I really push or pull this gel material. It seems like the sensor is not working but I don't know how to verify that. Removing the sensor causes a little rougher idle and harsh shifting and now that I've put the sensor back on after touching the gel material the engine has a more noticeable rougher idle.
The SCT x4 in my experience is a very safe tuner from a experienced company , Has 3 on board tunes you can also load other tunes from there web site , has a data logger and acts as a code reader plus other helpful functions . It is also one of very few tuners that you can back up your factory tune to a separate computer for safe keeping
I am a working on a 2000 F350 7.3. No tuner. There are no codes related to the Baro. On a n Xtool D8W scantool i have a Barometric pressure2 reading of 99546KPs 14000 PSI. that is an error from the scanner i assume. I also have a reading of 81.21 Hz. Do you know if the Baro in the PCM reports frequency or a varying voltage level?
Are you saying that with the Baro sensor internal to the PCM The scan tool should report a voltage not a frequency reading? I can't probe the sensor if it is inside the computer. It is possible that the program in the Xtool scanner is buggy. I will try to read it with other scanners when the truck comes back. I will clean the back pressure tube and replace the cam sensor because of intermittent codes. Your videos have been very helpful Thanks
Does it matter if a person reinstalls the tune after the factory setting is returned & the code is cleared to check the baro for throwing a code ? Do I leave it oem or can I go back to what I had programmed in it ? Thank you sir * Arkansas *
The swap you did is a normal upgrade and the engine won't be a issue its the auto transmission that a small percentage have had issues with so if you have a auto and have had no issues you are good to go
My baro reading is super high on but I'm not getting codes. I've heard that my scanner just might not be able read the sensor properly and is given a default reading. Any information you might regarding this situation would be greatly appreciated
baro reading for OBS is hit and miss you could always pay a shop to just plug and read with a high quality scanner if you are talking about a 99 n up don't worry unless you get a code
everything in these video's apply so did we check these issues already ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ZJ5BSBntTzA.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rasXr0ftSu4.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-OWDG_4G3O74.html
Hello I’m currently having a a shifting issue with my 97 f350 7.3l the transmission will shift great then it will randomly act like it’s not getting the signal to shift and flashing the overdrive light. If I unhook the batteries for a couple hours and hook them back up the transmission will shift smoothly again. I’m guessing it’s the pcm under the dash? Have you or anyone come across this issue? Thanks for any information and feedback.
Not sure if it is this issue, but I know the wires from the OD switch can get chaffed and cause a fuse to blow. Perhaps an item to check. Would be interested to hear if you got it fixed, what it was.
I'm having a low power issue in my 01 that I can't figure out. If my map sensor is plugged in, it will only make about 1.5-3 pounds of boost. If my map sensor is unplugged it will make 15-16 psi of boost. I can't seem to figure this one out, nor can I find anything on the forums or RU-vid. The map is new, the voltage is right on the money. If I put shop air to the map regulated at 20 psi it will show on the scanner that we are feeding it 20 psi and the truck will try to come alive. I have no smoke, no intake restrictions, nothing. Any help would be appreciated.
@@Diesel_ftw no. My son drives it now. And he isn't bothered by the lack of power. But I do have an injector rebuild kit that I'm going to put in it someday. But for now I've just been letting him drive it with no power.
I'm not getting any baro codes however live data shows 0psi at all times and I'm getting lots of black smoke, slightly low on power, and harsh shifting at times. Any ideas if the symptoms I'm having are from a bad baro sensor? Truck is 02 f250, new up pipes, rebuilt turbo, new injectors, new ebp sensor and tube, yet problem still persists and has me pulling my hair out
@@CUSTOMWORKS7.3PSD yes. Issue was present before all that. Seems to have gotten just a touch better after the new bellowed up pipes because the old were leaking and causing me to not get good boost. Getting 26 lbs now according to mechanical gauge. Still tons of smoke from half throttle or more. Obnoxious amounts of black smoke. I might also add that the truck fires off immediately even when sitting for a week, and idles super smooth. Just can't get this darn smoking issue sorted out
@@tylerwightman2315 do you still have the ebpv that flapper not being open will cause this issue , clogged air to air, you still will show good boost numbers, faulty IDM or pcm clogged converter, wires to injectors are not grounding out causing a injector to stay slightly open these are what I would look at it also would be helpful to know the egt's at 60mph empty and the above is all taking in account there is no tuning
@@CUSTOMWORKS7.3PSD Thanks for the reply and the great information! when I rebuilt the turbo, I deleted the ebpv with a different turbo outlet and a "delete" pedestal. I also installed a ts 6 position chip at the same time however there is no actual tuning on the pcm. Truck only has a muffler no converter. Sounds like I need to do a wire integrity test from the 42 way connector to each injector pigtail? When I buzz test them they all sound loud, healthy, and even like they are getting good power, but I guess it wouldn't hurt to do an integrity test on them. I also bought a new map sensor I need to install just for kicks. I might also add that the previous owner said this problem started immediately after he had a shop put new injectors in it. I know him from work and he drove for 3 years like that before I got the truck. Since he said the problem started after injector replacement I went right for the injectors first and put another set in with no change
@@tylerwightman2315- check your IDM/FICM. Mine was making my injection weird, due to age and weather intrusion. Also had bare spots on the engine wire harness where it u-turns down against the valve cover. I get no baro reading (0.0 psi) from my 03 7.3, using forscan, and am wondering from reading your comment, if the PCM is bad in my case, or if none of these PCM internal barometric pressure sensors from 99.5-03, provide it as data to ford 7.3 compatible scanners, (maybe only to the dealer scanner?,) or if it is an issue, that indicates a failed baro sensor in the PCM.
@@jesusisalive3227 PCM needs to replaced or rebuilt no other options cpaddict.com/7-3-pcm-rebuild-service-1994-5-2003/ or shop.fullforcediesel.com/dtc-rebuilt-pcm
