Fuel Rail Pressure Sensor Quick-Fix
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- Опубліковано 10 вер 2024
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Fuel Rail Pressure Sensor Quick-Fix
The Fuel Rail Pressure Sensor value is used by the ECM to control the Fuel-Pump rotational speed and injection. It measures the fuel pressure at the injectors. Here are the facts about the fuel-rail-pressure-sensor.
1) The only reason why the Fuel Rail Pressure Sensor was developed was to make the Fuel-Pump last longer.
2) Before the Fuel Rail Pressure Sensor was developed, the fuel pump was always woking at 100% load.
3) Using the Fuel Rail Pressure Sensor, the fuel pump module regulates the pump's rotational speed, according to engine load.
4) The Fuel-Pump module computer sends a Pulse-Width-Modulation signal to the fuel pump.
5) At idle, the need for excess fuel is reduced, so the fuel pump's speed is reduced, with input from the Fuel Rail Pressure Sensor.
6) The Fuel Rail Pressure Sensor has 3 wires, the sensor ground, 5 volt reference and the signal wire.
7) The Fuel Rail Pressure Sensor is used on returnless fuel systems.
8) A vacuum hose is used in the Fuel Rail Pressure Sensor to take engine vacuum into consideration when measuring the fuel pressure. It takes less pressure to flow fuel at high vacuum, idle, than at wide-open-throttle. This vacuum hose often leaks fuel with sensor damaged.
9) To test the Fuel Rail Pressure Sensor, disconnect the sensor, jump sensor signal to the 5 volt reference, then jump signal to sensor ground. You shoul see close to 5 volts and zero volts respectively. That proves the sensor wiring.
10) It is possible to test the Fuel Rail Pressure Sensor response signal, but such test is 99% of the time unnecessary. This is due to the newer smart vehicle ECMs and the rationality checks done on the Fuel Rail Pressure Sensor.
Finally, if faced with a Fuel Rail Pressure Sensor code, first test the wiring as mentioned here. Then, make sure the fuel pump can deliver a full charge, by either actuating the fuel pump using a scanner or manually energizing the fuel pump at 100% load. Compare reading at the fuel pressure gauge. A fuel volume gauge may also be needed to do this test. That's it for the Fuel Rail Pressure Sensor Quick-Fix.
Where is the "Quick fix" portion of this video?
the fuel rail pressure sensor was also made to lower the electrical load on the alternator and help fuel economy. The vaccuum line was put in place for safety in case of rupture of the sensor's diaphragm, instead of a fire you get a rough idle + ultra-bad fuel economy.
Ok, I think you're getting the technologies confused. This video is on FRP sensor for gasoline engines NON-Direct Injection. The Vacuum line is to take engine vacuum into consideration. It takes less pressure to flow the same fuel volume on an idle high vacuum engine, than at wide-open-throttle. ELectrical load has nothing to do with it. The newer High-Pressure-Direct-Injection gasoline engines also have a FRP sensor, but no vacuum hose and operate at over 1000PSI.
ADPTraining well i believe you get confused too so that's great!!! How can you get the exact pressure reading at all times with only one diaphragm and one signal going out when vacuum is supposed to mess with that same signal? Isn't the ECM informed anyways with calculated vacuum values with the engine load/rpm/MAF grams per secon and all??? And yes, a fuel pump that is controlled instead of just turned on will used less current to run so it lowers the electrical load.
There is no diaphragm on these sensors. They're solid state strain gauge. Most modern gasoline direct injection vehicles don't use MAP sensors anymore. The FRP sensor internally makes a correction according to vacuum. The load on the car is slightly alleviated by an Amp or so, but that's negligible. The purpose of the FRP sensor is to allow the ECM or Fuel-Module to control it's speed by Duty-Cycle control and thereby extending its life.
ADPTraining 6
map senor
I have an 06 Audi A4 3.2L and it won't start it will crank but not start up and if it does it only runs for about 10 seconds the pump is working could it be this sensor ?
As usual excellent demonstration....Why vacuum is high at idle speed rather than high speed? Thanks.
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can you tell me where the local for the 2008 porsche cayenne oil pressure sender , please . big help. thanks
To ADP Training: I just came across this video. I have a 2010 Ford Explorer. I had to replace the vacuum harness that goes to the EGR, the AC damper control and apparently to the FRP Sensor. I could never get to that connection under the manifold so I left it off. ( I believe I plugged the vacuum line). So my FRP sensor does not have a vacuum input. I am getting fault code P0193, fuel rail pressure sensor circuit high input. I have ignored it for a long time. My fuel mileage has actually improved since I replace the broken vacuum lines (as expected). Recently I started have issues where the Explorer would start to sputter and die and then restart while I was driving it. Could that be related to not connecting the vacuum line to the FRP Sensor. My OBDII connected to the Torque Application (Android) will not show fuel rail pressure at all. The graph shows up put the data is empty.
Get a simple OBD-2 scanner and get the right vacuum diagram. All vac hoses have to be connected.
I've a 08 is350 last week it didn't start so I had to change the fuel pressure sensor. what causes the fuel pressure sensor to go bad? does it have anything to do with fuel gasket? thanks
Mahmud Chowdhury did the truck start after you replaced the sensor? I have same issue not starting I was wondering if I have the same issue.
Hi . I have questions. When I'm driving heavy on hill the check engine light come on and no power , after hill road straight power back and no check engine light. I have 2011 freightliner cascadia DD15 engine. 2 codes: Leakage in high pressure fuel system too high (leak down test) & fuel Rail pressure Low . What's can be?
time to get a new car.
Try Mitchell
I have a 2006 Audi a4 2.0 I had this code WHRRE us the sensor located please. thank you
my pacifica o4 take 19 liters per 100km any idea pls help me thanks josef
I have a 2008 mazdaspeed 3 and my code read p0192 for the fuel rail pressure sensor but i can't find the part anywhere online! my car is in limp mode please help?!
scrap yard bud,
Thank you for this. Very clear and concise.
Hello Greetings I need your help please,
I have a zx2 99 and my fuel trim long climbs to 10%
I think that is something the fuel rail injection pressure sensor that put a gauge on the rail and mark idle 30 psi, to connect the multimeter to the sensor gives me a voltage 2.8 volts, disconnecting the vacuum hose rises to 40 psi gauge but the voltage remains unchanged at 2.8 volt this is normal operation of the sensor? and change it 2 times used sensors and they all work the same way or buy a new one or do I do?
@ADPTraining hi where's the placement of the fuel real pressure sensor in GDI machine kia sportage 2014 I can't find it
Mitchell
2002 Chrysler Sibling has been parked for 3 months it turns on then turns off. What could it be?
Junk
A closed "constant pressure" system is used to reduce gasoline evaporation. Return line systems cooled the injectors & purged air, but heating the fuel causes more fumes. Bad for the environment. Bad for mechanics too!
So how do you bypass the sensor to dive it to a repair shop
Thomas Shue You can't, but as a rule with this sensor damaged you can reach a repair shop, but not always.
Here are more resources... www.autodiagnosticsandpublishing.com/
hard wire your fuel pump directly to the battery, but with an on and off switch you can use
most cars will default back to a inferred pressure and although it will run like shit it should drive.
i have a duramax diesel with 49thousand miles 07 model engine light stays on what can i do to get it go off
hi, are u saying, the fuel pressure sensor works by sensing the vaccum in fuel rail?. and not the fuel pressure in the line.
There is no vacuum in the fuel rail. The FRP sensor is connected to intake vacuum. It takes into account the intake vacuum. The fuel delivery changes depending on the vacuum condition, as stated in the video.
Quite didnot understand, FRP is fuel rail pressure sensor, so are u saying FRP sensor calculate fuel rail pressure just by looking at vaccum?.. or it consider both vaccum and fuel raill pressure ?.
That's right, both are considered for the reason I explained before...
Does this sensor replace the mechanical fuel regulator? I have a ranger and it seems that it doesn't have a mechanical fuel regulator. Maybe it has this sensor?
I did my way 😂 check for errors, and after just change part, reset error if it’s not gone and wow all good😂 just did it today😂
Good for you.
I have a 2015 Chev Malibu with 177000 km and it shows code 0089 and code
0016. Code 0089 says it's the fuel pressure regulator and the 0016
says it's the
And ?
Thanks for posting that info :)
k@.hall.ha
if voltage is 4 instead of 5 wiring is good?
excellent video
Interesting.
Why the fuel tank takes to much time to fill
Question. If I take away vacuum from my fuel rail pressure sensor and plug the line, will it cause the car to run richer?
Yes of course. Also look at the Fuel Trims on your scanner. See my Ebooks. www.autodiagnosticsandpublishing.com/
Damn bet. I’m having an issue with a no codes lean condition and I replaced the frps so I’ll just unplug it and do that for a band aid
Fuel pump and all injectors are working correctly. Good duty cycles and everything. Might be a vacuum leak but I feel like that’d throw a code.
IF YOU JUMP THE 5V REF TO SIGNAL AND THE SIGNAL HAS A SHORT TO GROUND YOU MIGHT COOK THE 5V REF REGULATOR IN THE ECM. JUMPING THE SIGNAL TO GROUND TO SEE 0V IS OK EVEN IF THE SIGNAL IS SHORTED TO GROUND. A SAFER WAY TO JUMP THE REF TO SIGNAL IS TO USE A 5K OHM RESISTOR.
Forget the 5K Ohm resistor. NO jumping the 5v Ref. will not hurt anything. The 5 volt reference is protected ALWAYS, otherwise if a sensor shorts out the ECM is fried. NO, it doesn't happen. It's nice that you're being careful, but not necessary. Instead of a 5K resistor, use the actual test light. The light bulb will give you piece of mind, it won't protect any circuit because no protection is needed.
heavily protected 5v reference wire I agree and so far I have not damaged an ecm yet but I have shorted the reference wire and lost all communication until regulator re-booted. I guess I don't want to burn up a lot of time if I can avoid it. Both ways work. Cheers !!
Steve Rob Now you're talking. Yes, the ECM shuts power to the 5 volt reference and resets afterwards. Also, you bright a good point and one that can BENEFIT a lot of folks, in almost all cases, the vehicle communications network goes down when the 5 volt reference is shorted. YES, IMPORTANT and I use capital to alert people to read this post. So, when faced with a No-Communications symptom, also check the 5 volt reference at different sensors. Doesn't take long. If shorted, then look for the shorted sensor and disconnect it. You'll have the COMM network back to life right away.
you and i think alike
ADPTraining you are approving the test light method i suggested. :)
Sir, in engine all sensors are working in how many volts
5
Liked And subscribed
Quick fix or quick test?
Both
So…. At the end how it is fix? Test and all done? Fix? 😂
Sure
This is the most garbage video ever produced in the former USSR.
Sure
I have an 06 Audi A4 3.2L and it won't start it will crank but not start up and if it does it only runs for about 10 seconds the pump is working could it be this sensor ?
Steven Reyes Check your basics: SPARK, FUEL-INJ-PULSE (NOID-Light), Fuel Pressure and last Compression. Then post back or proceed with the diagnostics. www.autodiagnosticsandpublishing.com/Automotive_Diagnostic_Repair_Book_Catalog.htm
excellent video