Great video, lots of good info here. The regulator portion of our factory filter ended up rusting and causing a fuel leak. I believe the return from the regulator sent the rust particles back to the pump, killing it. Kind of a pain!
During cleaning all the fuel system on 2001 Saturn SL2 I installed a new Fuel Filter fm Amazon (PTC PGF846 Fuel Filter). The filter has internal fuel pressure regulator, like the one discussed in this great film. After ~ 1 month the car gave a code P0401, which keeps coming, and occasionally it is accompanied w/P0300, P0301, and what is important here P0172. I checked the fuel pressure. Specifications on that car: 40 - 55 psi. Pressure decay less that 8 psi in 5 min. The result is: 8:02pm 53 psi I switched off the engine 8:08pm 36 psi So the pressure decay was 17 psi in 5 min. But that is if to measure from the value on the gauge (which was 53 psi). But if to compare w/specified limits, maybe I need to compare with 40 psi, which is the lower limit in specifications. Then the decay will be in allowed values and nothing wrong w/the filter. Haynes says: If the hold pressure is less then specified, but EricTheCarGuy, when he measured that decay said the pressure should hold, and doesn't deviate from the reading on the gauge. And his pressure hold after the engine shut off on the value, which was on the gauge during the engine running. My question is: Do we measure a decay from the current value on the gauge, or from the lower pressure limit in specs? I measured the pressure before w/old filter, and it was holding pressure, I think the current (measured w/running engine), but I'm not sure. I would appreciate any opinions on this matter. The film was very helpful in my research for the question above, it was great to see the internal structure of the filter I have.
Thanks, you saved doing the same cut and inspection job; my injection system is on an ATV engine in an Ultralight weight shift aircraft, so uses a simple regulator, WITHOUT a reference feed over the diaphragm to reduce fuel pressure when high vacuum in the inlet manifold. Motor was running lean using a VW filter with built in regulator like the one you dismantled, so added an external pressure regulator after the filter/regulator in the return to ensure the system pressure was high enough (3 bar). However the filter regulator you and I have, references atmospheric by comparing pumped pressure at inlet with the pressure in the open return line, which is open to the tank. As there is no external connection to atmospheric, if I add a pressure regulator after the filter return line it will create 3 bar + whatever the regulator is set to. Now thanks to you, realise need to fit a simple none regulator canister filter with a Tee piece installed after it, one to the fuel pressure regulator and the other to the fuel rail.
Thanks for making this video. I have a 1999 Saturn SL2 which also uses an "in-filter" fuel pressure regulator. Your explanation helped me understand how it works.
This is the same setup on my 04 2.0 BEV engine. Thanks for all of the clarification it helped me understand the concept. I thought the same thing you did about the flow being from the center port.
Fantastic video! I just replace a filter with built-in pressure regulator and I been wondering how it works. Thank you for taking the time explaining and best of all cutting it open.
@MDRN Engineer, I like your explanation and appreciate the clarity of you video. Its well understood. This info was vital to me as I am doing a TDI swap, from TSI. This gives me an idea how to hook my diesel return line
Man where have you been all this time you are the kind of engineer that I have been looking for and needing all alone thank you now how do I subscribe to your Channel thank you
I really enjoyed this! I didn't know this had a built-in regulator. I like how the devil is in the details when deciding how close to reality one's assumptions are during calculations.👍
Very good video..on my car Skoda Fabia Greenline i have the same filter fitted but only 2 pipes in it..one pipe to OUT going to the engine and one pipe to the center of the regulator..the IN of the filter has a cap..my question in this combination the petrol și filtred properly? I have recently changed the filter and waching your video i resume that the filter is there for nothing..thanks..
Thank appreciate the work, also wondered how it works,now I know I am about to replace my filter. I like your cad software...been using solidworks...will definitely look up some more videos of the software you using. Thanks again.
Hi William - I'd like to preface this by saying this was completely theoretical, with very rough estimations for the individual components and their geometries. That said, I'd like to correct your statement a bit. The spring is not exerting 126 Nm, but rather 126 N (in the given condition). The unit Nm is literally Newtons multiplied by meters and represents a torque (force times distance). In this case the spring exerts 126 N. You can think of it this way... 126 N is equivalent to 28.3 pound force. Therefore, if you were to set the uncompressed spring on a table (on end) then put a 28.3 lb weight on top, the spring would compress 10 mm. This seems to make sense since it required a vice to compress the spring at all. The spring constant that I solved for provides a value to tell us how much force the spring will exert with a given deformation. That is why the units are N / m or force per distance. If you change the units to N / mm, you will get 12.6 N / mm (which is equivalent to 125 N / m). So with each mm the spring is compressed (from a relaxed state), the spring will exert an additional 12.6 newtons on the object compressing the spring. Hope this helps.
This was awesome. Thank you! I may be missing something, but why doesn't this type of filter/regulator require a vacuum/boost reference to counter the pressure inside the engine? I'm assuming it's because these filters without boost reference are on direct injection cars. I'm just slightly confused on how the interaction would be different or if direct injectors simply spray so much differently it's not a concern. Thanks.
At least on my audis that use these, they have dual fuel pumps. A low pressure in tank pump>fuel filter/pressure regulator> high pressure mechanical fuel pump with electronically controlled components that work with the ecu to synch rpm and load/requested load and injector duty cycle (and afr 02 sensors) to keep the AFR spot on as needed
I have a quick question. I am running a Toureg 3.2 engine in my mk4. The Toureg fuel rail only has in inlet no return ,no regulator. The stock fuel rail has feed and return with the regulator on the rail on the return side. So wouldnt it be feasible to use the fuel filter with the built in regulator and plumb the feed inlet/outlet, and the return and not have to get a different fuel rail
@MDRN Engineer Matt , question for you. If the return line of the filter would be compressed or pinched, would that increase the PSI that the fuel filter puts out? Cery interested in your reply!
@@ModernEngineer Wow You answered quickly. I wonder how much of a compression would be required to achieve a 8 bar filter. And how much you can compress an aluminium housing before it cracks.
@@ModernEngineer I get and respect that, but that is not always feasible :) It was more of a mathematics/fluid dynamics and physics question. Since you are better equipped then me regarding these subjects, figured I would ask. Now, I have been informed that increassing pressure would actually diminish flow the filter would allow… so now I am all confused on why the OEM filter went from a 6.4 bar to a 6.6 bar revision…
I am new at this so please be patient with me and you ain't going nowhere I ain't going to let you go I need the answer about to check valve inside of the fuel pump as soon as possible thank you
Oh I am not going to let you get away I need to know how to check valve inside of the fuel pump male functions and allow fuel pressure to become back pressure and you have to turn the ignition key five or six times before the pressure builds up before cranking the engine please help me thank you
Nice drawings, etc. However, something seems not right. 6.6 Bar = ~95 psi. That's a very high value as an output pressure. Also, to sustain that output pressure, the input pressure from the fuel pump in the tank has to be well more than 95 psi! This can't be. Could it be that the 6.6 Bar rating is the maximum input pressure the regulator can safely handle, and that the output pressure is something more along the lines of about 40 psi?
Great video, lots of good info here. The regulator portion of our factory filter ended up rusting and causing a fuel leak. I believe the return from the regulator sent the rust particles back to the pump, killing it. Kind of a pain!
FANTASTIC EXPLANATION! Thank you so much for this detailed breakdown. I just replaced my fuel filter/regulator in a MK6.
Best video that explain this, theres also a filter with vac connection to regulate fuel pressure. But not on vag
During cleaning all the fuel system on 2001 Saturn SL2 I installed a new Fuel Filter fm Amazon (PTC PGF846 Fuel Filter). The filter has internal fuel pressure regulator, like the one discussed in this great film. After ~ 1 month the car gave a code P0401, which keeps coming, and occasionally it is accompanied w/P0300, P0301, and what is important here P0172. I checked the fuel pressure. Specifications on that car: 40 - 55 psi. Pressure decay less that 8 psi in 5 min.
The result is:
8:02pm 53 psi I switched off the engine
8:08pm 36 psi
So the pressure decay was 17 psi in 5 min. But that is if to measure from the value on the gauge (which was 53 psi). But if to compare w/specified limits, maybe I need to compare with 40 psi, which is the lower limit in specifications. Then the decay will be in allowed values and nothing wrong w/the filter.
Haynes says: If the hold pressure is less then specified, but EricTheCarGuy, when he measured that decay said the pressure should hold, and doesn't deviate from the reading on the gauge. And his pressure hold after the engine shut off on the value, which was on the gauge during the engine running.
My question is: Do we measure a decay from the current value on the gauge, or from the lower pressure limit in specs?
I measured the pressure before w/old filter, and it was holding pressure, I think the current (measured w/running engine), but I'm not sure. I would appreciate any opinions on this matter.
The film was very helpful in my research for the question above, it was great to see the internal structure of the filter I have.
I am using one of this Audi filters and your video cleared all the questions I had . Excellent content
Thanks, you saved doing the same cut and inspection job; my injection system is on an ATV engine in an Ultralight weight shift aircraft, so uses a simple regulator, WITHOUT a reference feed over the diaphragm to reduce fuel pressure when high vacuum in the inlet manifold.
Motor was running lean using a VW filter with built in regulator like the one you dismantled, so added an external pressure regulator after the filter/regulator in the return to ensure the system pressure was high enough (3 bar).
However the filter regulator you and I have, references atmospheric by comparing pumped pressure at inlet with the pressure in the open return line, which is open to the tank.
As there is no external connection to atmospheric, if I add a pressure regulator after the filter return line it will create 3 bar + whatever the regulator is set to.
Now thanks to you, realise need to fit a simple none regulator canister filter with a Tee piece installed after it, one to the fuel pressure regulator and the other to the fuel rail.
Thanks for making this video. I have a 1999 Saturn SL2 which also uses an "in-filter" fuel pressure regulator. Your explanation helped me understand how it works.
This is the same setup on my 04 2.0 BEV engine. Thanks for all of the clarification it helped me understand the concept. I thought the same thing you did about the flow being from the center port.
Fantastic video! I just replace a filter with built-in pressure regulator and I been wondering how it works. Thank you for taking the time explaining and best of all cutting it open.
@MDRN Engineer, I like your explanation and appreciate the clarity of you video. Its well understood. This info was vital to me as I am doing a TDI swap, from TSI. This gives me an idea how to hook my diesel return line
Excellent explanation, I can see you have a wide understanding of physics and mathematics. Very good theory, very understandable.!! Saludos.
Man where have you been all this time you are the kind of engineer that I have been looking for and needing all alone thank you now how do I subscribe to your Channel thank you
damn that's the same regulator they put on the rails. Nice!
I really enjoyed this! I didn't know this had a built-in regulator. I like how the devil is in the details when deciding how close to reality one's assumptions are during calculations.👍
Very good video, step by step explained.
I am working on beetle, and looking for fuel line diagram, when I found this video. Excellent explanation ..
This was absolutely amazing! You saved me from hooking up my fuel filter wrong.
it's a true engineer... congratulations!
Very underrated vid, good job bro
Thanks for the video Matt, first time I have seen this kind of filter👍
Very good video..on my car Skoda Fabia Greenline i have the same filter fitted but only 2 pipes in it..one pipe to OUT going to the engine and one pipe to the center of the regulator..the IN of the filter has a cap..my question in this combination the petrol și filtred properly? I have recently changed the filter and waching your video i resume that the filter is there for nothing..thanks..
Appreciate the easy to follow MK6 Golf R content. Premiere is like clickbait haha
Silas Vongsamath I really didn’t know what the premiere was... now I know!
Excellent job, thank you for sharing your experience
Amazing video!!!!Thank you very much....this makes everything clear!!!Well done!!!
Thank appreciate the work, also wondered how it works,now I know I am about to replace my filter. I like your cad software...been using solidworks...will definitely look up some more videos of the software you using. Thanks again.
Thanks for making this video!
Filter without pressure regulator, can they make problems on tsi engine?
Hey, why does the polo I'm working on have only the return and the fuel out connected?
Hello i have a audi a6 c6 3.2fsi and i have problem with cold start,can be a problem that fuel filter?
Thx
Very interesting! Could you explain spring rates and spec? I'm confused as to how that tiny spring puts out 126Nm, excellent explanation.
Hi William - I'd like to preface this by saying this was completely theoretical, with very rough estimations for the individual components and their geometries. That said, I'd like to correct your statement a bit. The spring is not exerting 126 Nm, but rather 126 N (in the given condition). The unit Nm is literally Newtons multiplied by meters and represents a torque (force times distance). In this case the spring exerts 126 N. You can think of it this way... 126 N is equivalent to 28.3 pound force. Therefore, if you were to set the uncompressed spring on a table (on end) then put a 28.3 lb weight on top, the spring would compress 10 mm. This seems to make sense since it required a vice to compress the spring at all. The spring constant that I solved for provides a value to tell us how much force the spring will exert with a given deformation. That is why the units are N / m or force per distance. If you change the units to N / mm, you will get 12.6 N / mm (which is equivalent to 125 N / m). So with each mm the spring is compressed (from a relaxed state), the spring will exert an additional 12.6 newtons on the object compressing the spring. Hope this helps.
Great video, thank you so much
This was awesome. Thank you!
I may be missing something, but why doesn't this type of filter/regulator require a vacuum/boost reference to counter the pressure inside the engine? I'm assuming it's because these filters without boost reference are on direct injection cars. I'm just slightly confused on how the interaction would be different or if direct injectors simply spray so much differently it's not a concern. Thanks.
At least on my audis that use these, they have dual fuel pumps. A low pressure in tank pump>fuel filter/pressure regulator> high pressure mechanical fuel pump with electronically controlled components that work with the ecu to synch rpm and load/requested load and injector duty cycle (and afr 02 sensors) to keep the AFR spot on as needed
hie .i need a help ,how can extend the fuel pressure for a golf as from 6,6 bars atleast up to 8 bars
does my audi a4 b7 1.6 8v 75kw alz have that regulator?
I have a quick question. I am running a Toureg 3.2 engine in my mk4. The Toureg fuel rail only has in inlet no return ,no regulator. The stock fuel rail has feed and return with the regulator on the rail on the return side. So wouldnt it be feasible to use the fuel filter with the built in regulator and plumb the feed inlet/outlet, and the return and not have to get a different fuel rail
My car is stage 2 with 3bar regulator.. Can i fit 4 bar without remap?
What is different between 4.4 fitter 6.6 fitter
good work
@MDRN Engineer
Matt , question for you. If the return line of the filter would be compressed or pinched, would that increase the PSI that the fuel filter puts out? Cery interested in your reply!
I would assume so.
@@ModernEngineer Wow You answered quickly. I wonder how much of a compression would be required to achieve a 8 bar filter. And how much you can compress an aluminium housing before it cracks.
@@ModernEngineer This is for a big turbo Setup!
If I were you I’d look for a proper filter at the appropriate pressure
@@ModernEngineer I get and respect that, but that is not always feasible :) It was more of a mathematics/fluid dynamics and physics question. Since you are better equipped then me regarding these subjects, figured I would ask. Now, I have been informed that increassing pressure would actually diminish flow the filter would allow… so now I am all confused on why the OEM filter went from a 6.4 bar to a 6.6 bar revision…
I am new at this so please be patient with me and you ain't going nowhere I ain't going to let you go I need the answer about to check valve inside of the fuel pump as soon as possible thank you
Hello, I mounted a filter with 6.6 bar, instead of 6.4 bar.
Do you think that is bad ?
No
Don't have water separator drain?
Thanks mate
Oh I am not going to let you get away I need to know how to check valve inside of the fuel pump male functions and allow fuel pressure to become back pressure and you have to turn the ignition key five or six times before the pressure builds up before cranking the engine please help me thank you
Hallo,
In my opinion the central hole area should not be subtracted
Very nice yoy have so helpfull
Nice drawings, etc. However, something seems not right. 6.6 Bar = ~95 psi. That's a very high value as an output pressure. Also, to sustain that output pressure, the input pressure from the fuel pump in the tank has to be well more than 95 psi! This can't be. Could it be that the 6.6 Bar rating is the maximum input pressure the regulator can safely handle, and that the output pressure is something more along the lines of about 40 psi?