Leak Detection Pump Replace
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    1. #1
      Junior Member PigeonDoubleTake's Avatar
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      Leak Detection Pump Replace

      Iím getting tired of the endless cycle of open fuel filler cap warnings and eventual CELs.

      Does replacing the evap pump really call for dropping the exhaust and all the other work VIDA indicates? I thought I had read a post about squeezing the pump out of its niche without all the work. Has anyone ever managed to do this or am I just imaging things??


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    3. #2
      Member Racer_S's Avatar
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      pump may be fine, usually the top of the fuel pump develops a crack which can be epoxied or the rubber hose cracks. the rubber hose can be replaced by lowering the muffler.
      2004 XC70 2.5T AWD Crystal Green Pearl/Charcoal [240K] Mud Guards, 05- Wiper Arms, 305mm brake upgrade, Full LED Exterior, 1-inch lift Pic
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    4. #3
      Junior Member PigeonDoubleTake's Avatar
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      No luck there. Some time ago my indy gave it a smoke test and came up with nothing.


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      '95 Volvo 850 T5 (gifted to sibling)
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    6. #4
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      Has the ECM software been updated? If you are running an early version you might be getting a false warning.

      Easy way to tell which version you have; attempt to run the fuel tank swift test with VIDA, it won't let you proceed without the newest version. The updated software was developed to accommodate for wear in the LDP motor. The logic used for monitoring evap leaks is current consumption for the LDP. If you know anything about electronics it's no secret that electric motors use more current as they age, hence the false code for a leak.
      04 V70R Flash Green/Atacama6MT

    7. #5
      Junior Member PigeonDoubleTake's Avatar
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      Iíll have to give that a try tonight. Iím fairly confident I asked the dealership to check for this specific update. But I wouldnít put it past them to have forgotten to check.


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      '95 Volvo 850 T5 (gifted to sibling)
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    8. #6
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      Did you replace fuel filler cap?

    9. #7
      Junior Member PigeonDoubleTake's Avatar
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      VIDA reports software is updated.

      And yes to having replaced the filler cap o ring.


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      '93 Volvo 240 Wagon (totaled in wreck with 430,000 miles)
      '95 Volvo 850 T5 (gifted to sibling)
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      '06 Volvo XC90 2.5
      '04 Volvo V70 R

    10. #8
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      If the dealer has smoke tested the tank system and no leaks were found, very likely the LDP is faulty. You'll need to lower the exhaust and heat shield, but I don't bother disconnecting it. If you remove the rear hangers you'll have enough clearance.

      Shouldn't take you more than a couple hours in the driveway with some long hand tools and a mirror. Just for S & G's you may want to inspect the hose to the evap valve near the starter. It likes to dry rot and set leakage codes too.
      04 V70R Flash Green/Atacama6MT

    11. #9
      Junior Member PigeonDoubleTake's Avatar
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      Ok, thanks for the tip!

      What kind of hose should I replace the evap lines with? Iíve got extra silicone laying around. Or does that not play nice with fuel vapors?


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      '93 Volvo 240 Wagon (totaled in wreck with 430,000 miles)
      '95 Volvo 850 T5 (gifted to sibling)
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    12. #10
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      The hose under the hood can be replaced with silicon.
      04 V70R Flash Green/Atacama6MT

    13. #11
      Senior Member ZZZZZZZ's Avatar
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      Iíve got a cel from this also, on the s60. Are you saying this hose under the hood may be the issue? Can someone post a pic of the part and quick instructions of how to do it if the hose (upon I soectjon) needs to be replaced? Iíd obviously like to avoid the whole pump replacement if itís not needed. I think I read the S needs to have the fuel tank dropped slightly...
      "The Real IPD" - ZZZZZZZ's thread
      2007 Passion Red/Gobi VRgt; 2005 Silver/Beige Leather S60 2.5T AWD; 2002 Silver/Off black leather V70XC
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    14. #12
      Junior Member PigeonDoubleTake's Avatar
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      Leak Detection Pump Replace

      Quote Originally Posted by Ihatespeedbumps View Post
      The hose under the hood can be replaced with silicon.
      Ok. Replaced the under hood stuff with silicone today.

      As for the pre-formed stuff, should I replace any of these when I do the leak pump?

      30650674
      30650675


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      Last edited by PigeonDoubleTake; 07-28-2018 at 07:18 PM.
      '93 Volvo 240 Wagon (totaled in wreck with 430,000 miles)
      '95 Volvo 850 T5 (gifted to sibling)
      '99 Volvo S80 T6 (death by GM transmission)
      '06 Volvo XC90 2.5
      '04 Volvo V70 R

    15. #13
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      Quote Originally Posted by PigeonDoubleTake View Post
      Ok. Replaced the under hood stuff with silicone today.

      As for the pre-formed stuff, should I replace any of these when I do the leak pump?

      30650674
      30650675


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      Unless they are split or very brittle I wouldn't. In fact I don't recall ever replacing one of those hoses...
      04 V70R Flash Green/Atacama6MT

    16. #14
      Junior Member PigeonDoubleTake's Avatar
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      Awesome, I like that answer. Less $$$$, haha.



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      '95 Volvo 850 T5 (gifted to sibling)
      '99 Volvo S80 T6 (death by GM transmission)
      '06 Volvo XC90 2.5
      '04 Volvo V70 R

    17. #15
      Junior Member PigeonDoubleTake's Avatar
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      One other thought occurred to me. I only get the open filler cap warnings on hot days. Would a failing pump act temperamentally this way? Or should I be checking the valves?


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      '93 Volvo 240 Wagon (totaled in wreck with 430,000 miles)
      '95 Volvo 850 T5 (gifted to sibling)
      '99 Volvo S80 T6 (death by GM transmission)
      '06 Volvo XC90 2.5
      '04 Volvo V70 R

    18. #16
      Junior Member PigeonDoubleTake's Avatar
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      Quote Originally Posted by ZZZZZZZ View Post
      Iíve got a cel from this also, on the s60. Are you saying this hose under the hood may be the issue? Can someone post a pic of the part and quick instructions of how to do it if the hose (upon I soectjon) needs to be replaced? Iíd obviously like to avoid the whole pump replacement if itís not needed. I think I read the S needs to have the fuel tank dropped slightly...
      Attachment 43391

      As far as I know these are the under-the-hood hoses in question. I replaced mine with some spare silicone I had laying around. I'm also considering replacing the cylindrical valve poking out from under the manifold before I tackle the leak pup.

      By the way, the photo is of an 04 XC70, not my VR. But it looks similar.
      Last edited by PigeonDoubleTake; 07-30-2018 at 08:16 PM.
      '93 Volvo 240 Wagon (totaled in wreck with 430,000 miles)
      '95 Volvo 850 T5 (gifted to sibling)
      '99 Volvo S80 T6 (death by GM transmission)
      '06 Volvo XC90 2.5
      '04 Volvo V70 R

    19. #17
      Member Hounddogger's Avatar
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      Quote Originally Posted by ZZZZZZZ View Post
      Iíve got a cel from this also, on the s60. Are you saying this hose under the hood may be the issue? Can someone post a pic of the part and quick instructions of how to do it if the hose (upon I soectjon) needs to be replaced? Iíd obviously like to avoid the whole pump replacement if itís not needed. I think I read the S needs to have the fuel tank dropped slightly...
      Alright having just done this... You need to pull the solenoid valve off its rubber hanger behind the starter and check the lines...

      IMG_0526.jpg
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    20. #18
      Senior Member ZZZZZZZ's Avatar
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      Thanks, but the picture is missing, or I canít see it.
      Quote Originally Posted by PigeonDoubleTake View Post
      Attachment 43391

      As far as I know these are the under-the-hood hoses in question. I replaced mine with some spare silicone I had laying around. I'm also considering replacing the cylindrical valve poking out from under the manifold before I tackle the leak pup.

      By the way, the photo is of an 04 XC70, not my VR. But it looks similar.
      "The Real IPD" - ZZZZZZZ's thread
      2007 Passion Red/Gobi VRgt; 2005 Silver/Beige Leather S60 2.5T AWD; 2002 Silver/Off black leather V70XC
      Past: 1999 Tropic Blue/Green/Oak leather V70 (NAa); Mom traded 1975 Maroon/Maroon leather 164E

    21. #19
      Senior Member ZZZZZZZ's Avatar
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      I need a collaborator. In person.
      Please move to Maryland. 😁
      Quote Originally Posted by Hounddogger View Post
      Alright having just done this... You need to pull the solenoid valve off its rubber hanger behind the starter and check the lines...

      IMG_0526.jpg
      "The Real IPD" - ZZZZZZZ's thread
      2007 Passion Red/Gobi VRgt; 2005 Silver/Beige Leather S60 2.5T AWD; 2002 Silver/Off black leather V70XC
      Past: 1999 Tropic Blue/Green/Oak leather V70 (NAa); Mom traded 1975 Maroon/Maroon leather 164E

    22. #20
      Junior Member PigeonDoubleTake's Avatar
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      How about now?

      It should give you some context with houndsí picture.


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      '95 Volvo 850 T5 (gifted to sibling)
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    23. #21
      Member Hounddogger's Avatar
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      Iíd also check where the plastic hose couples to the under car hose... thatís right next to the passenger side SIPS plate. There is a 3Ē section of rubber hose where the line exits the tray that it and the fuel line are in.
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    24. #22
      Senior Member JRL's Avatar
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      All the LDP does is monitor the system. Other than that it has no function.
      If VIDA says your CEL is from the pump, either a hose right next to the pump is bad but MOST LIKELY you have a bad pump...period.
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    25. #23
      Junior Member PigeonDoubleTake's Avatar
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      As far as I can recall my codes are for leaks, major and/or minor.

      Given these codes I was under the impression that there is some ambiguity as to whether this would mean an actual leak or a failing pump that is drawing too much juice and thus tricking the system into thinking there is a leak.


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      '95 Volvo 850 T5 (gifted to sibling)
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    26. #24
      Senior Member JRL's Avatar
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      You said you had a LDP code, please make up your mind.
      You need to get it scanned with VIDA to find out EXACTLY what the problem is, not a generic reader!
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      2007 V70 2.5T White/Oak/Tan/Arena, 114K miles. My DD with no plans to sell it anytime soon
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    27. #25
      Junior Member PigeonDoubleTake's Avatar
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      Quote Originally Posted by JRL View Post
      You said you had a LDP code, please make up your mind.
      You need to get it scanned with VIDA to find out EXACTLY what the problem is, not a generic reader!
      Ah. Sorry for the confusion. Its minor and major leak codes (I have VIDA).


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    28. #26
      Senior Member JRL's Avatar
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      Then your pump is probably fine. Now comes the fun part, tracking it down
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    29. #27
      Junior Member black944 turbo's Avatar
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      I am getting an intermittent light as well. Can someone point me in the right direction to look at all the lines mentioned (i.e. Tank, passenger rubber line). I have a brand new Oem gas cap and a new check valve assembly that is pictured above.
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    30. #28
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      Run EVAP system test in VIDA. If it never starts (vacuum is not building up), it's the pump.

    31. #29
      Junior Member black944 turbo's Avatar
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      Mine won't run due to the fact that it does not have the updated software.
      2005 V70R M66, Titanium-Gobi

      1986 944 Turbo, Black-Tan

      Past; 940t wagon, 940, 960 wagon, 240 wagon and several others in the family.

    32. #30
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      Software update was for increasing the tolerance to the leaks, as I understand it.

      EVAP pump has a built-in diag mode, you should be able to run the test. But I'm not firmly sure here, since my car has that update.

    33. #31
      Junior Member black944 turbo's Avatar
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      Ok, I will try it again. The last time it brought me to the page that said that it was not updated but that's as far as it would go.
      2005 V70R M66, Titanium-Gobi

      1986 944 Turbo, Black-Tan

      Past; 940t wagon, 940, 960 wagon, 240 wagon and several others in the family.

    34. #32
      Junior Member black944 turbo's Avatar
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      Silly question, there is a filter on the filler neck. It seems to be leaking, if I put my finger over the end and let go it makes the car try to die. It appears to be leaking under pressure to. This is the only leak I can find in the system. It puffs as the car runs and you can physically feel air coming out of it. My question, is this supposed to do this, or is this my problem? I can post a picture of it, but f need be.
      2005 V70R M66, Titanium-Gobi

      1986 944 Turbo, Black-Tan

      Past; 940t wagon, 940, 960 wagon, 240 wagon and several others in the family.

    35. #33
      Junior Member black944 turbo's Avatar
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      I just ran the initialization on the pump and all the other components and they can audibly be heard working with no strange noises. I assume that it is the filter or whatever it is called that I mentioned above.
      2005 V70R M66, Titanium-Gobi

      1986 944 Turbo, Black-Tan

      Past; 940t wagon, 940, 960 wagon, 240 wagon and several others in the family.

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