Fuel pressure regulator question....99 volvo v70xc

[abscate]

I think the last pic is the rollover valve, not an Intake air control valve. That’s seals up the Evap system in case you roll the car over like June does every once In a while. If the hoses on it are fat, like 1 cm thick, that’s Evap. A leak there, or a split can make a hissing noise , too.

Non turbo cars in 99 have an iac. Turbo cars in 99 do not, it’s built into the electronic throttle body system ( ETB, ETM, or ETS are all used to describe that)

[V70xc1999]

Thanks.....its not comming from the hose.....it was comming from where the 2 parts join..there is only one vacume hose and 3 fuel lines that conect to... all are good.so i took apart resealed and gonna put it back in today....I will see.....there should be no air comming from or being sucked in correct...

[Jbreww]

1555211171624226702049233992032.jpg pic of it out of car

Have you found the name of this plastic part. I broke mine and need to replace it. Can't find a part name or number anywhere.

[FLXC90]

https://usparts.volvocars.com/a/Volvo_2 ... 28023.html, here's you r rollover valve.
Is there any part number on the plastic adapter block? There is an o-ring on the FPR, is thee a groove for one on the mounting location for the plastic adapter?

[rrres]

1555211171624226702049233992032.jpg pic of it out of car

Have you found the name of this plastic part. I broke mine and need to replace it. Can't find a part name or number anywhere.

It doesn't look like you can buy the plastic block part separately. You have to buy the whole fuel pipe assembly, which comes with the plastic block, fpr, and fuel lines. Volvo calls it Fuel Line, CPL. Part number is 9445592

[scot850]

I understood the fuel line is NLA and has been since just after the time I bought one 6 years ago. Strange thing is it now shows as being available again. GCP.se in Sweden show that part number in stock.

Neil.

[bcfischer]

I also have a '99 V70XC in Minnesota.

How does one get to the FPR on a '99 V70XC? I've seen diagrams that suggest that it is on top of the fuel tank in a place where the sun never shines. It looks like other folks, even mere mortals, have been able to find it and even take a picture of it without an arthroscopic camera.

I am running a low pressure and I'm not sure if it is the pump itself or if the regulator is limiting it. The fuel pump is not old (but it isn't OEM either) and the pressure at the rail is about 40-45PSI, well off of the spec.

Brian

[erikv11]

The FPR on a 99 XC70 is more like ahead of the rear passenger side wheel, but under the edge of the car. Aft of the fuel filter. Very easy to eyeball/access with car up in the air, or even just snaking your head around under there. Take a look there first, look for something like there FPR shown on page 1 of this thread.

Do you trust the accuracy of the pressure gauge? Pressure should be about 50 PSI so 40-45 is not that far off, could just be the gauge. At any rate, I would expect the car to run fine at 40-45.

Is the engine not running well and if so, what are the symptoms?

[abscate]

Fuel pressure at the engine fuel rail is 42 psi for ME7 cars like the 99 XC

Fuel pressure at the pump after filter is 55 psi spec, before the FPR

The FPR moved around a bit on 98 99 00 models and can be left rear wheel, or on top of the tank, requiring an axle drop to access

[bcfischer]

Is the engine not running well and if so, what are the symptoms?

A hard negative on the running well. Right now it's not running at all. It seems that the ECM is convincing itself that it is running lean at idle and low RPM and, as a result, forces itself to run rich, causing erratic misfires (not always the same cylinder) and spark plug fouling with a black carbon. When I could get it to run, It would experience very poor power response, especially on any form of an incline, until it got to a bit above 2K RPM, where the pitch of the exhaust would change to a more normal acceleration sound and the motor would rev further more normally.

I unplugged the battery to reset the fuel trim to default and will be cleaning the spark plugs as soon as I can get the two remaining valve cover screws off that my non-Volvo mechanic stripped when he was looking at it. (I'm sure that the T-25 screws absolutely required an impact driver...).

The front O2 sensor has been throwing codes for years. I have a replacement and hope that I can get under there to swap it out. Last year I pulled the prop shaft off after it failed in the middle of the night in the middle of the UP of Michigan when my daughter was driving home from college. I'm hoping that the absence of the prop shaft makes it easier to get leverage on the O2 sensor.