Thank you Clint! I was having odd idle issues, surging, and couldn’t figure out what was going on. Did a simple voltage test after inspecting the air line, and my #2 wire was fluctuating from 2.5-1.7… all over the place. Going to order a new sensor today. This channel rocks, keep putting the knowledge out there. All of us weekend warriors appreciate it!
eBay, amazon, napa, O'Reilly, autozone, all sell cheap ass Chinese junk sensors. Motorcraft or bust when it comes to sensors on these trucks, old and new. Great video Clint, these video series will be super helpful to a lot of people.
Awesome video Clint! Been chasing this issue with No Cel on our 02’. Just posted a video with what fixed the mystery. It was the Map Sensor. Replaced the hose as well. Like a brand new truck again, biggest difference was the throttle response and power is back!! Great channel.
You are also right on getting good parts the first time get ford motor craft. Parts like power relays or glo plugs you also talk a little bit on how a person can tell when they need these items by watching your red light on the dash how long it stays on it stays on5to 7 secs you problem ok lf it still hard to start need gloplugs thanks for the show 20 yrs ford tech l.f.k.
I rebuilt my turbo with a KC DIY kit. Truck ran better. Next year I decided to put a turbosmart wastegate actuator on. Started throwing a P1249 PCM boost and actual boost both showed peak boost 22-23 PSI Installed a boost fooler. Same reading. Bought a different boost fooler Same result. Put a new OEM MAP sensor and now the PCM only sees 15 PSI and no more P1249 code. Nothing I had read about throwing that code suggested that it could be the MAP sensor.
Awesome Possum! I love your tips and tricks on symptoms and how to inspect it with the expected voltages. Thanks for sharing. Best Wishes & Blessings. Keith Noneya
Thanks. Motor means electric motor engine means truck or car engine lot of people will say I need to get gas when you have a diesel no you need to get fuel or diesel not gas thanks good show ihave two of these great 7.3 diesel I might add I had a 6.9 that ran over 450 ths mile no break down it had no turbo not much power but stayed together
I had about 2.4 volts at idle, and it never changed. I replaced the sensor, and the new one was exactly the same. Any idea where I look to find the cause?
With my map plugged in it will not accelerate past 1200rpms. Once I unplug the map sensor I can rev a lot faster but it does have some hesitation flatness to it. I replaced the map sensor and the exhaust back pressure sensor and no difference. When I start it up regardless of being hot or cold it lopes. Until I get the rpm’s above 1000. It does the same thing in neutral. What else should I look for. I think pcm may be bad. It just happened instantly it wasn’t like it kept getting worse.
Mine did the same thing. Pretty much instantly lost a solid 3mpg after sitting at the body shop for 6weeks. I've been chasing the lost mileage and over richness every since.
Clint, everyone is always talking about their boost pressure. Who cares? I recently fixed a couple boost leaks and want to know how much of a difference I made. What map pressure should I be looking for on a stock truck? Hard acceleration and cruising?
@custom works my question is on the second pin I had someone reving slowly to 1200rpm & the voltage stayed between 1.55 to 1.60 does that mean I have a bad sensor? Plz do respond like u always did so that I can order new sensor. Thanks for always responding in timely manner.
Have a 2002 E350 Superduty 7.3 powerstroke Van original owner, would like to Put a new high performance Air Box cold Air but cannot find one. The original is cracked in the front before the filter but letting in hot air.
You'll just have to put in another oem airbox. I have replaced a couple. I'm a diesel van guy myself. It's not a bad design as for being cold air intake.
Must be what is wrong with Mine. I was thinking maybe the Temp Sensor at first. I use to get 18mpg pretty consistently Now I get 14.5 religiously. Engine only has 150k miles 2002 F350 std cab 4x4 7.3 Single rear wheel Auto. I did replace the pass side head due to a Defective Factor casting Cyl head. it rusted out from the outside into the water jacket. like I've never seen that before.
(2000 7.3 SD, Central TX) Mine is reading 1.4v at idle and does not change at all when RPM increases up to 1200. You say if it doesn't change OR if it changes too dramatically it's bad? I'm a little confused about what I'm looking for. Great videos thx so much for all the info!
Great info sir ! I have 1997 F350 7.3 turbo 5spd standard crew cab .My question to you is where can I purchase a scanner for this obs truck? Also genuine Ford parts are harder to purchase from Ford for the later years up here in Canada 😞 any information on where to obtain a scanner would be greatly appreciated ! Thank you once again and keep those videos coming! 👍
We are testing 14 affordable scan systems now and will update you and every one else who has been asking I have a custom made unit but that company went under in 2020
Mine reads 4.99 volts in and at idlel its reads 1.5 volts out and reads the same at 1200 rpms. This is the third one in two weeks. Two duralast and current on the standard brand just to try something different. The truck is a late 99 model 7.3. Its driving me crazy.
I’ve got a 1996 and P107 code. When I tested the number 2 pin I was getting 2.5 volts and when revving up to 1200 rpm I got no change whatsoever. So does that mean my sensor is bad? I was just reading a reply to my post on The Diesel Stop and a guy said that the 94-97 Powerstroke Map Sensors operate differently than the 99-03. He said the 94-97 generate a variable frequency with pressure rather than variable voltage with pressure. He said your method of testing only applies to 99-03. Any help would be appreciated!
Sorry for my ignorance...I am a week end 'mechanic' . I have 3 questions 1. The picture you show of the pin numbers is from the perspective of looking at the connector, not the sensor correct? So if looking at the sensor it would be a mirror image...#1 pin on the left, not the right. It obviously wouldn't affect the position of #2 center pin since there are only 3 pins... 2. Do you not need to check pin #3? 3. How do you suggest making electrical contact to the pins since the plug is still attached to the sensor?
Have a 2000 7.3 set of remanufactured injectors new glow plugs and new vcg and gpr and idm good batteries and starter. Will not fire at 0 degrees Celsius just lots of whit smoke. Hit it with a shot of starter fluid and catches and runs smooth. Ipr icp hpop all works fine 500 + psi 35 is % ipr signal what else can I do. Black smoke when I put my food to the floor but not excessive. Fuel at 50psi before running 25 when it fired up the hpop tank 3/4 inch down getting frustrated with it now. It started after the truck ran out of fuel and ran batteries flat had nowhere to pug it in for the night in -40 Celsius weather thought it had enough fuel but apparently not Can you help please?
I have the same question. If I'm checking the voltage from the wiring, is the pigtail bad? How do you check the actual sensor? I did, however, check the responsiveness of my truck without the MAP connected and it seemed like it was more responsive. With the MAP connected, it seemed to dog a little more. Might be in my head!
Using FORScan what should be my map sensors base reading with key on? My map is reading 14 but my baro is reading 17 . One of them is off cause as I understand they should be the same.
Good day brother I so take your words for religion lol seriously I do believe that spending the right money once is your best bet , my new odyssey batteries are insane truck cranks over and man the sound of it turning is so much better keep up the good fight bro
The MAP sensor should have 5 volts going to it, and be returning 0-5 volts when reading a pressure of 0-51 PSI. KOER Remember that it is an absolute pressure sensor, so at engine off, it should read atmospheric pressure, which should be about 14.7 PSI at sea level.
So my volts on the first wire key on engine off is 0.0018 volts and the middle wire runing is 1.5 and dont change to 1200rpm so is the computer bad it gets volts from computer right ?? Thanks in advance for any information will be appreciated and ive got a another map sensor reads the same
Thank you Clint! I was having odd idle issues, surging, and couldn’t figure out what was going on. Did a simple voltage test after inspecting the air line, and my #2 wire was fluctuating from 2.5-1.7… all over the place. Going to order a new sensor today. This channel rocks, keep putting the knowledge out there. All of us weekend warriors appreciate it!
eBay, amazon, napa, O'Reilly, autozone, all sell cheap ass Chinese junk sensors.
Motorcraft or bust when it comes to sensors on these trucks, old and new.
Great video Clint, these video series will be super helpful to a lot of people.
Awesome video Clint! Been chasing this issue with No Cel on our 02’. Just posted a video with what fixed the mystery. It was the Map Sensor. Replaced the hose as well. Like a brand new truck again, biggest difference was the throttle response and power is back!! Great channel.
Thanks !!!!!!!!!!!!!!
Thanks for all the 7.3 knowledge. Keep 'em coming.
You bet!
You are also right on getting good parts the first time get ford motor craft. Parts like power relays or glo plugs you also talk a little bit on how a person can tell when they need these items by watching your red light on the dash how long it stays on it stays on5to 7 secs you problem ok lf it still hard to start need gloplugs thanks for the show 20 yrs ford tech l.f.k.
I rebuilt my turbo with a KC DIY kit. Truck ran better.
Next year I decided to put a turbosmart wastegate actuator on.
Started throwing a P1249
PCM boost and actual boost both showed peak boost 22-23 PSI
Installed a boost fooler.
Same reading.
Bought a different boost fooler
Same result.
Put a new OEM MAP sensor and now the PCM only sees 15 PSI and no more P1249 code.
Nothing I had read about throwing that code suggested that it could be the MAP sensor.
This guy is the man, he has helped me with so much thank you
Awesome Possum! I love your tips and tricks on symptoms and how to inspect it with the expected voltages. Thanks for sharing. Best Wishes & Blessings. Keith Noneya
Thanks. Motor means electric motor engine means truck or car engine lot of people will say I need to get gas when you have a diesel no you need to get fuel or diesel not gas thanks good show ihave two of these great 7.3 diesel I might add I had a 6.9 that ran over 450 ths mile no break down it had no turbo not much power but stayed together
Thanks for this video, The tube on my 96 F-250 definitely needed replacing. I had no clue what it was for till this video, Keep the videos coming!
Glad it helped
What were the symptoms
@@manuelesparza9321 Slight power loss. Mine was borderline good. Its a cheap easy fix. If you have doubts just change it.
I had about 2.4 volts at idle, and it never changed. I replaced the sensor, and the new one was exactly the same. Any idea where I look to find the cause?
Thank you Sr. For the information.
With my map plugged in it will not accelerate past 1200rpms. Once I unplug the map sensor I can rev a lot faster but it does have some hesitation flatness to it. I replaced the map sensor and the exhaust back pressure sensor and no difference. When I start it up regardless of being hot or cold it lopes. Until I get the rpm’s above 1000. It does the same thing in neutral. What else should I look for. I think pcm may be bad. It just happened instantly it wasn’t like it kept getting worse.
Mine did the same thing. Pretty much instantly lost a solid 3mpg after sitting at the body shop for 6weeks.
I've been chasing the lost mileage and over richness every since.
Clint, everyone is always talking about their boost pressure. Who cares? I recently fixed a couple boost leaks and want to know how much of a difference I made. What map pressure should I be looking for on a stock truck? Hard acceleration and cruising?
@custom works my question is on the second pin I had someone reving slowly to 1200rpm & the voltage stayed between 1.55 to 1.60 does that mean I have a bad sensor? Plz do respond like u always did so that I can order new sensor. Thanks for always responding in timely manner.
Awesome video as always! Question, is 5.2 volts on #1 and 2 volts on #2 of the map too high?
Hi, I'm getting code U1262 and P0603. On my 2002 7.3l, ( forscan ) gages "yes fault" SSBAF/SS1F Shift Solenoid #1 and #2. Thank you for all you do.
Have a 2002 E350 Superduty 7.3 powerstroke Van original owner, would like to Put a new high performance Air Box cold Air but cannot find one. The original is cracked in the front before the filter but letting in hot air.
You'll just have to put in another oem airbox. I have replaced a couple. I'm a diesel van guy myself.
It's not a bad design as for being cold air intake.
@@highadventur can you recommend where I should shop for one?
I would love to have a conversation with you my 96 7.3 is about to make me take a bath wit a toaster
Must be what is wrong with Mine. I was thinking maybe the Temp Sensor at first. I use to get 18mpg pretty consistently Now I get 14.5 religiously. Engine only has 150k miles 2002 F350 std cab 4x4 7.3 Single rear wheel Auto. I did replace the pass side head due to a Defective Factor casting Cyl head. it rusted out from the outside into the water jacket. like I've never seen that before.
It runs noticeably Richer But not enough to be problematic.
(2000 7.3 SD, Central TX) Mine is reading 1.4v at idle and does not change at all when RPM increases up to 1200. You say if it doesn't change OR if it changes too dramatically it's bad? I'm a little confused about what I'm looking for. Great videos thx so much for all the info!
these numbers represent volts as it goes from idle to 1200rms approx
here the data;
psi VDC
0 1.43
3 2.27
5 2.59
8 3.03
10 3.38
14 3.89
16 4.17
18 4.47
19 4.59
20 4.75
21 4.89
22 4.93
23 4.93
27 4.93
@@CUSTOMWORKS7.3PSD So if my voltage isn't changing then it's bad. Awesome thank you. New one on its way
Great info sir ! I have 1997 F350 7.3 turbo 5spd standard crew cab .My question to you is where can I purchase a scanner for this obs truck? Also genuine Ford parts are harder to purchase from Ford for the later years up here in Canada 😞 any information on where to obtain a scanner would be greatly appreciated ! Thank you once again and keep those videos coming! 👍
We are testing 14 affordable scan systems now and will update you and every one else who has been asking I have a custom made unit but that company went under in 2020
@@CUSTOMWORKS7.3PSD thank you sir for your prompt reply! I’ll be looking forward to your test results and product !👍
Where can I find a engine harness
P#1C3Z12B637CA? I can’t find one. It’s for a 2003 F350 with California emissions
Mine reads 4.99 volts in and at idlel its reads 1.5 volts out and reads the same at 1200 rpms. This is the third one in two weeks. Two duralast and current on the standard brand just to try something different. The truck is a late 99 model 7.3. Its driving me crazy.
Any update?
I’ve got a 1996 and P107 code. When I tested the number 2 pin I was getting 2.5 volts and when revving up to 1200 rpm I got no change whatsoever. So does that mean my sensor is bad? I was just reading a reply to my post on The Diesel Stop and a guy said that the 94-97 Powerstroke Map Sensors operate differently than the 99-03. He said the 94-97 generate a variable frequency with pressure rather than variable voltage with pressure. He said your method of testing only applies to 99-03. Any help would be appreciated!
Sorry for my ignorance...I am a week end 'mechanic' . I have 3 questions 1. The picture you show of the pin numbers is from the perspective of looking at the connector, not the sensor correct? So if looking at the sensor it would be a mirror image...#1 pin on the left, not the right. It obviously wouldn't affect the position of #2 center pin since there are only 3 pins...
2. Do you not need to check pin #3?
3. How do you suggest making electrical contact to the pins since the plug is still attached to the sensor?
Have a 2000 7.3 set of remanufactured injectors
new glow plugs and new vcg and gpr and idm good batteries and starter. Will not fire at 0 degrees Celsius just lots of whit smoke. Hit it with a shot of starter fluid and catches and runs smooth. Ipr icp hpop all works fine 500 + psi 35 is % ipr signal what else can I do. Black smoke when I put my food to the floor but not excessive. Fuel at 50psi before running 25 when it fired up the hpop tank 3/4 inch down getting frustrated with it now. It started after the truck ran out of fuel and ran batteries flat had nowhere to pug it in for the night in -40 Celsius weather thought it had enough fuel but apparently not
Can you help please?
Does it fire with engine heater plugged in I need to know this first
when testing pin #3 it reads 0 volts and stays there. the other 2 pins tested within range. Does this mean my sensor is bad?!?
I’m unsure as to how this reading works if the power is not connected to the map sensor, how is it reading the sensor?
Thank you for recognizing my comment but it would be appreciative if you could explain this situation
I wanted to know too as this was the question I was going to ask.
I have the same question. If I'm checking the voltage from the wiring, is the pigtail bad? How do you check the actual sensor?
I did, however, check the responsiveness of my truck without the MAP connected and it seemed like it was more responsive. With the MAP connected, it seemed to dog a little more. Might be in my head!
e he is back probing the pins through the plug
Using FORScan what should be my map sensors base reading with key on? My map is reading 14 but my baro is reading 17 . One of them is off cause as I understand they should be the same.
Good day brother I so take your words for religion lol seriously I do believe that spending the right money once is your best bet , my new odyssey batteries are insane truck cranks over and man the sound of it turning is so much better keep up the good fight bro
Good night
Which sensor if any can cause extreme plumes of grey smoke?
Its difficult to diagnosis with out being in front of your engine, That being said this is usually a injector , bad turbo, last a ring or valve issue
@@CUSTOMWORKS7.3PSD thanks I was thinking that also but was wishful thinking. Thanks for the response and great videos
How does this reading work if the sensor is unplugged? I'm getting a reading of 5 on first pin and nothing on the second pin. Ty in advance.
The MAP sensor should have 5 volts going to it, and be returning 0-5 volts when reading a pressure of 0-51 PSI. KOER
Remember that it is an absolute pressure sensor, so at engine off, it should read atmospheric pressure, which should be about 14.7 PSI at sea level.
So my volts on the first wire key on engine off is 0.0018 volts and the middle wire runing is 1.5 and dont change to 1200rpm so is the computer bad it gets volts from computer right ?? Thanks in advance for any information will be appreciated and ive got a another map sensor reads the same