It can be an infuriating problem. I need to go to work but I will look back in as often as I can. Did you change the fuel filter lately? If you didn't, do it and report back.

 

Hi Anchorman, thanks for the reply.

I did change the filter after the one year gap between failures, as like you I thought it could only be the filter as the scv's were only a year old. Although it fixed the problem it only was ok for about three weeks, then it came back.

Now whatever we do (replacing the scv's, even with the old ones) it seems to fix it for about 100 miles/a week or so, then we have the P0627 and poor performance again. When off the car all four scv's work ok when you put 12v across them. It's confusing and infuriating as there just seems no rhyme or reason. I'd be happy to buy new scv's again if I thought it clear the problem for a year again, but I'm not convinced it would...

Appreciate any thoughts you may have!

Cheers... P

 

If you remove the outlet pipe from the filter to the HP pump and pump the primer, does fuel flow freely?

 

I'll have to pass on that one for a few days. We swapped the scv's back again yesterday so everything is working fine. I would expect the problem to return by next weekend, so I will try the test you suggested then... :serious

Cheers

 

One little question anchorman, does the D4D have a secondary fuel pump in the rear fuel tank? There are 4 wires going to the top of the tank, presumably two for the tank gauge, but what are the other two?

Cheers... Pete

 

For the low fuel switch. There is no pump in the tank.

I don't like poaching contributors from R4W but you'd be better posting on RAV4 Drivers Club then somebody else will keep an eye on you if I'm at work. They are fully conversant with diesel engined RAVs.

You need to avoid supermarket diesel like the plague. Use high grade diesel which is loaded with detergent. I would take the SCVs out and wash the plunger ends in clean diesel or even WD40. We've also had problems with aftermarket fuel filters.

Toyota Technical Q & A

 

That's very interesting re supermarket fuels. I'll use Total Excellium diesel in future (I live in France so supermarket fuel is very widely used).

Also, the filter I put in recently was Bosch, so hopefully ok...?

I will post a similar thread on the driver's club forum as you've suggested, as the more RAV owners that are aware of this issue, the better!

 

Sticking SCVs are a common problem. You would hope that a Bosch filter is OK but they don’t make filters, only buy them in branded! Clean the SCVs first and then change the filter when you get chance.