the underlørd Posted August 22, 2006 Report Share Posted August 22, 2006 2000 V70 XC, the car won't catch when you first start it, but then you do it a second time, and it'll start. It does it after the car has been sitting a while. 65K Miles. seamus where you at homie!? Link to comment Share on other sites More sharing options...
Guest the UL Posted August 23, 2006 Report Share Posted August 23, 2006 sea----muss... :P Link to comment Share on other sites More sharing options...
Seamus Posted August 23, 2006 Report Share Posted August 23, 2006 There is a small stainless steel pressure regulator on the right side of the fuel tank. This regulator acts like a check valve when the car is turned off. This valve is vary small and often gets small particles of crap in it causing it to stick open and allow the fuel in the fuel rail to return to the tank. Remove the fuel cap first and remove the check valve from the plastic holder (two torx 25 screws) and blow air and carb cleaner through it to clear it. the car will start every time. the regulator is not available separately and is not even visible on VADIS, it is part of the entire fuel line on the tank. Link to comment Share on other sites More sharing options...
the underlørd Posted August 23, 2006 Author Report Share Posted August 23, 2006 i heart you seamus. :wub: Link to comment Share on other sites More sharing options...
MarcS Posted August 23, 2006 Report Share Posted August 23, 2006 Fabulous! I have the same problem. I'm gonna go hunt that sucker down! I'm going to head into it tomorrow morning. Link to comment Share on other sites More sharing options...
MarcS Posted August 23, 2006 Report Share Posted August 23, 2006 Ok, now I'm a bit mystified. I just spent a couple of hours trying to locate this sucker and haven't found it yet. I didn't see anything back by the fuel filter except for the bleeder valve and then the fuel lines dissappear over the top of the fuel tank.Is it this one? (I know you said it wasn't in VADIS)If that's the case, It looks like I have to drop the tank to get to it and for the AWD that seems to mean dropping the rear end unless you guys have some clever tricks to get to it. I did find a small plastic hatch under the rear passengers seat that might give access, but it is well glued in.So - Is the regulator in the picture the one you are talking about and do I really need to drop the tank to fix this puppy? :unsure: Link to comment Share on other sites More sharing options...
Seamus Posted August 23, 2006 Report Share Posted August 23, 2006 That's the one! What I meant was there is no part # for it. You can drop the front edge of the tank/suspension and get to it. The two wheel drive cars have the same thing out in the open. Hey I never said it was going to be easy, only that I said I knew what it was!! :P Link to comment Share on other sites More sharing options...
MarcS Posted August 24, 2006 Report Share Posted August 24, 2006 That's the one! What I meant was there is no part # for it. You can drop the front edge of the tank/suspension and get to it. The two wheel drive cars have the same thing out in the open. Hey I never said it was going to be easy, only that I said I knew what it was!! Well, I put the car up on stands and had a good look at what I would need to remove in order to lower the tank a couple of inches to access the regulator. It looks like that includes the drive shaft, the right rear jacking point and associated stuff, and the muffler. I think I will probably live with turning the key 2 seconds longer than normal. Nice to know what it is though, if I ever replace the tank I will take care of it. I did explore where the little plastic hatch under the seat went, as it looked to be right in the correct spot to access the regulator. Unfortunately it goes into a unibody cavity. Of course I haven't ruled out the sawzall yet! :lol: Link to comment Share on other sites More sharing options...
Seamus Posted August 24, 2006 Report Share Posted August 24, 2006 Sawzall!!! Yikes!!! :huh: Link to comment Share on other sites More sharing options...
MarcS Posted August 24, 2006 Report Share Posted August 24, 2006 Thinking about this a bit more.....It seems like the function that is messed up is that the regulator is not doing it's job as a check valve and that gas is draining back out of the rails. This means you have to run the engine a few cycles until the gas gets there. Option 1: Drop the rear end and clean out the valve (ick) (no, make that double ick!)Option 2: Cut an access panel with the sawzall. JK JK Option 3: (Danger, new non-volvo approved idea ) Insert a check valve near the front of the tankWhere the fuel lines emerge from the top of the tank and pop into the long undercarriage cover, I bet there is all sorts of room to put a small check valve in place. That might just do the trick, and it is easy to access. It can't be that hard to source an after-market fuel-capable check valve. Link to comment Share on other sites More sharing options...
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