Faulty fuel pressure
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    1. #1
      Junior Member lolvos60R's Avatar
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      Faulty fuel pressure

      Only started after I installed my est catted dp and cat back. Got the ecm400-c for twc signal too high along with that I got fuel pressure faulty. Donít remember the code since I erased it and never came back yet.... ordered a spacer for the rear o2 for the cat code. pump duty cycle at idle is between 50-52% and between 395-405kpa. It will rise to about 70% duty under full throttle and the pressure rises accordingly. Will double check on my way home tonight. Thereís absolutely no hiccups or misses. Car runs and drives fine and pulls as it should. Did have one no start a couple weeks ago. Started every time since. I do have the aeromotive pump from viva in the tank. I have emissions due and Iím not really sure if itís the pump or the pem is just finally pissed about it. The pump and pem are the same age. Replace both together. Was going to order the Bosch unit from fcp but trying to find out if thatís the actual problem. All the wiring seems good. Pem is in the trunk. I was also told when I bought the car 5+ years ago it had an ipd tune. I have not yet confirmed that and idk if that would make things difficult. Just wanted some guidance from some of the Volvo guys to see if Iím on the right track. Sorry for the long, all over the place post. Thank you in advanced.


      Edit: fuel filter was also changed with the pump and pem. Also had to remove the pump a few times due to debris in the tank from initial job. dirt hides under the locking ring.


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      Last edited by lolvos60R; 01-13-2020 at 10:10 PM.
      05 sr sapphire/nordkap, three pedal arrangement Custom 3" intake pipe w/ stock air box mahle filter, aeromotive fuel pump welded A.G. Bob villa mod PPS: Poly front control arm bushings, poly torque mount, poly subframe inserts Powerflex: race #12/street #5,8,13 Ipd toe bars BC coil overs EST D.P. catted w/ Viva performance cat back exhaust Goodyear eagle f1 asymmetric 2 tires 235/40-18 and of course PEGS!!!
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    3. #2
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      When the PEM on my wife's s60 started to go it would hesitate and bog when accelerating, then eventually lost all power. Doesn't sound like that's happening but also I'm sure they die in different ways? Could also grab a PEM from a junkyard and see if swapping makes it better. Most cars '05+ have em in the trunk. Just make sure you get the right one for your tank, there are two different part numbers for the plastic and metal tanks!

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    4. #3
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      If you get the "fuel pressure too low" fault code, it is most likely the fuel pressure sensor in the fuel rail. I had that problem, replaced it, code went away, came back, replaced second time, no problems since. I think my first replacement part was defective.

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    6. #4
      Junior Member lolvos60R's Avatar
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      Quote Originally Posted by tabormeister View Post
      When the PEM on my wife's s60 started to go it would hesitate and bog when accelerating, then eventually lost all power. Doesn't sound like that's happening but also I'm sure they die in different ways? Could also grab a PEM from a junkyard and see if swapping makes it better. Most cars '05+ have em in the trunk. Just make sure you get the right one for your tank, there are two different part numbers for the plastic and metal tanks!

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      Yea thereís no hesitation what so ever. Still makes all the pressure according to vida. They do die in different ways for sure. Itís probably not a bad idea to get a spare pem to swap it to diagnose. A good used one is cheap enough.


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      05 sr sapphire/nordkap, three pedal arrangement Custom 3" intake pipe w/ stock air box mahle filter, aeromotive fuel pump welded A.G. Bob villa mod PPS: Poly front control arm bushings, poly torque mount, poly subframe inserts Powerflex: race #12/street #5,8,13 Ipd toe bars BC coil overs EST D.P. catted w/ Viva performance cat back exhaust Goodyear eagle f1 asymmetric 2 tires 235/40-18 and of course PEGS!!!
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    7. #5
      Junior Member lolvos60R's Avatar
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      Quote Originally Posted by cleanerPA View Post
      If you get the "fuel pressure too low" fault code, it is most likely the fuel pressure sensor in the fuel rail. I had that problem, replaced it, code went away, came back, replaced second time, no problems since. I think my first replacement part was defective.
      It wasnít low fuel pressure. It just said faulty fuel pressure. Iím guessing cause the duty cycle was high at idle. The FPS is new ish. Couple years old maybe. When it went on me before it would hesitate in certain rpms and it threw a code for the FPS. Replaced it and never had a problem til this popped up. Thereís no drive ability issues at all. Funny thing is the three way cat code says that faulty fuel pressure could be the cause for that code but I canít get it to come back since clearing on Saturday. The cat code came back on the first drive cycle. The duty cycle is still at 50% at idle and climes to about 65-70% under full throttle toward the high rpms and the pressure went up to like 620kpa ish if I remember correctly. I didnít take a picture of the live data.


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      05 sr sapphire/nordkap, three pedal arrangement Custom 3" intake pipe w/ stock air box mahle filter, aeromotive fuel pump welded A.G. Bob villa mod PPS: Poly front control arm bushings, poly torque mount, poly subframe inserts Powerflex: race #12/street #5,8,13 Ipd toe bars BC coil overs EST D.P. catted w/ Viva performance cat back exhaust Goodyear eagle f1 asymmetric 2 tires 235/40-18 and of course PEGS!!!
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    8. #6
      Junior Member lolvos60R's Avatar
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      Added the o2 spacer and cat cote disappeared! Also duty cycle on pump went down to 48% at idle. No fuel pressure code yet after a week.


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      05 sr sapphire/nordkap, three pedal arrangement Custom 3" intake pipe w/ stock air box mahle filter, aeromotive fuel pump welded A.G. Bob villa mod PPS: Poly front control arm bushings, poly torque mount, poly subframe inserts Powerflex: race #12/street #5,8,13 Ipd toe bars BC coil overs EST D.P. catted w/ Viva performance cat back exhaust Goodyear eagle f1 asymmetric 2 tires 235/40-18 and of course PEGS!!!
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    9. #7
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      I had a car brought to me that had the fuel pump replaced and dirt in tank. The pump had been replaced again but the code came back weeks later and PEM duty cycle was like yours, 52-54% idling warmed up. I pulled pump and cleaned the tank debris out and then I took the pumps out of the cup and used brake cleaner spray to get the dust off the pickup screen on bottom of pumps. The dust/silt had gotten that primary filter partly plugged and suction side obstruction certainly makes pump work harder. The PEM signal @ idle was under 40% once cleaned.

      I took the pumps loose from cup but did not undo fuel lines to do the spraying. I took that apart as an investigation to see if something was on that membrane filter and it was nearly black.
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    10. #8
      Junior Member lolvos60R's Avatar
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      Faulty fuel pressure

      Quote Originally Posted by cattlecar View Post
      I had a car brought to me that had the fuel pump replaced and dirt in tank. The pump had been replaced again but the code came back weeks later and PEM duty cycle was like yours, 52-54% idling warmed up. I pulled pump and cleaned the tank debris out and then I took the pumps out of the cup and used brake cleaner spray to get the dust off the pickup screen on bottom of pumps. The dust/silt had gotten that primary filter partly plugged and suction side obstruction certainly makes pump work harder. The PEM signal @ idle was under 40% once cleaned.

      I took the pumps loose from cup but did not undo fuel lines to do the spraying. I took that apart as an investigation to see if something was on that membrane filter and it was nearly black.
      This has crossed my mind with the possibility that the filter is getting clogged up also. I did have to pull the pump after install cause I didnít get all the crap in the tank the first time. It looked clean but apparently had hiding garbage in places I couldnít see. It has been 3 years+ since install. It wouldnt really hurt anything to pull and check the fp screen.


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      Last edited by lolvos60R; 01-18-2020 at 12:59 PM.
      05 sr sapphire/nordkap, three pedal arrangement Custom 3" intake pipe w/ stock air box mahle filter, aeromotive fuel pump welded A.G. Bob villa mod PPS: Poly front control arm bushings, poly torque mount, poly subframe inserts Powerflex: race #12/street #5,8,13 Ipd toe bars BC coil overs EST D.P. catted w/ Viva performance cat back exhaust Goodyear eagle f1 asymmetric 2 tires 235/40-18 and of course PEGS!!!
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    11. #9
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      Your duty cycle seems high. I haven't had much luck with the aeromotive and have been much happier with the DW300 in my other cars.

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    12. #10
      Junior Member lolvos60R's Avatar
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      Quote Originally Posted by martynunya View Post
      Your duty cycle seems high. I haven't had much luck with the aeromotive and have been much happier with the DW300 in my other cars.

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      Thatís what I found also with my research thatís why I was going to swap to a Bosch unit. I had to modify the basket to make aero pump to fit. I read the dw300 was a direct swap. Iíd probably need a new basket to make that pump work.


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      05 sr sapphire/nordkap, three pedal arrangement Custom 3" intake pipe w/ stock air box mahle filter, aeromotive fuel pump welded A.G. Bob villa mod PPS: Poly front control arm bushings, poly torque mount, poly subframe inserts Powerflex: race #12/street #5,8,13 Ipd toe bars BC coil overs EST D.P. catted w/ Viva performance cat back exhaust Goodyear eagle f1 asymmetric 2 tires 235/40-18 and of course PEGS!!!
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    13. #11
      Junior Member lolvos60R's Avatar
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      400-c twc signal too high has returned. On second sensor also. looks like Iíll be pulling the pump to check the pump screen for blockage. According to vida faulty fuel pressure is one of the issues that causes this cat code and it does seem to be an issue.


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      05 sr sapphire/nordkap, three pedal arrangement Custom 3" intake pipe w/ stock air box mahle filter, aeromotive fuel pump welded A.G. Bob villa mod PPS: Poly front control arm bushings, poly torque mount, poly subframe inserts Powerflex: race #12/street #5,8,13 Ipd toe bars BC coil overs EST D.P. catted w/ Viva performance cat back exhaust Goodyear eagle f1 asymmetric 2 tires 235/40-18 and of course PEGS!!!
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    14. #12
      Junior Member lolvos60R's Avatar
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      Fuel pressure- faulty signal ecm-2900 was the code I had in vida. Found a post from big Forman when he had this problem and he replaced the pump and it fixed it. Itís been to cold with no garage to pull the pump and really would only like to do it once.


      Sent from my iPhone XR using Tapatalk
      05 sr sapphire/nordkap, three pedal arrangement Custom 3" intake pipe w/ stock air box mahle filter, aeromotive fuel pump welded A.G. Bob villa mod PPS: Poly front control arm bushings, poly torque mount, poly subframe inserts Powerflex: race #12/street #5,8,13 Ipd toe bars BC coil overs EST D.P. catted w/ Viva performance cat back exhaust Goodyear eagle f1 asymmetric 2 tires 235/40-18 and of course PEGS!!!
      Stage 0- in progress

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