[PigeonDoubleTake]

I’m 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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[Racer_S]

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.

 

[PigeonDoubleTake]

No luck there. Some time ago my indy gave it a smoke test and came up with nothing.


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[Ihatespeedbumps]

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.

 

[PigeonDoubleTake]

I’ll have to give that a try tonight. I’m fairly confident I asked the dealership to check for this specific update. But I wouldn’t put it past them to have forgotten to check.


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[vtl]

Did you replace fuel filler cap?

 

[PigeonDoubleTake]

VIDA reports software is updated.

And yes to having replaced the filler cap o ring.


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[Ihatespeedbumps]

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.

 

[PigeonDoubleTake]

Ok, thanks for the tip!

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


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[Ihatespeedbumps]

The hose under the hood can be replaced with silicon.

 

[ZZZZZZZ]

I’ve 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? I’d obviously like to avoid the whole pump replacement if it’s not needed. I think I read the S needs to have the fuel tank dropped slightly...

 

[PigeonDoubleTake]

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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[Ihatespeedbumps]

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...

 

[PigeonDoubleTake]

Awesome, I like that answer. Less $$$$, haha.



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[PigeonDoubleTake]

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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[PigeonDoubleTake]

I've 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? I'd obviously like to avoid the whole pump replacement if it's not needed. I think I read the S needs to have the fuel tank dropped slightly...

View 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.

 

[Hounddogger]

I've 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? I'd obviously like to avoid the whole pump replacement if it's 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...

 

[ZZZZZZZ]

Thanks, but the picture is missing, or I can't see it.

View 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.

 

[ZZZZZZZ]

I need a collaborator. In person.
Please move to Maryland. 😁

Alright having just done this... You need to pull the solenoid valve off its rubber hanger behind the starter and check the lines...

View attachment 43393

 

[PigeonDoubleTake]

How about now?

It should give you some context with hounds' picture.

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