Power Boost Valve fitting problem...

[wonderland]

I've bought the PBV as normal, vertical bolts fitment as it should be etc etc etc. After fitting, petrol was leaking everywhere from the rubber o-ring seal so I tried another one... and it's the same again

I'm sure it's fitted properly, the same orientation as the original i.e. fitted lengthways, return to tank in to the bottom of the unit (straight into the left hand side if looking side on into the engine bay from the passenger wing), vacuum pipe from the top (out of the right hand side towards the bulkhead) and the high-pressure line from the tank into the underneath.

In a bit of a mood i've ripped the thing out again and there is a definate difference in fitment to the original unit which never had a problem. Has anyone else had this issue and was it ever resolved because my £80 is about to go through the window. For the record, it's on a 1989 2.9 V6 S2.

Thanks

[clive f]

I fitted pbv recently and had the same problem, the new O ring,, just wouldn`t fit at all no matter how hard I tried, and when I thought that it was okay the fuel would start seeping out when engine running.I got so wound up I buggered the o ring by nipping the edge with a screwdriver when trying to fit it, in the end I took the o ring off of the old unit, and pushed so hard I thought it had gone on past the recess and into the fuel rail, but apparently this is where it should be, located down in the rail, hard up against the liitle shoulder in the bootom of the hole, with the o ring itself no longer visable from above.
hope this helps, clive.

[wonderland]

Ah ha.... that's my problem I think. The o-ring is basically sticking halfway out from where it should be based on your experience. Is it easier to insert the o-ring first and then the valve once it's seated correctly, or just to push it in as hard as possible (a hammer comes to hand easily) until it goes all the way in (ooh er!)

[F908 Tim]

Hope you get it sorted now James.

Would you and Clive post your impressions about how they perform?
Kentish rates his but whats your view...money well spent or a bit dissapointing???
I think I will get one if you rate them too,now I know the fitting technique

[wonderland]

Cheers, so do I, with a little help off the forum chaps it'll be sorted I'm sure.

As for my impressions so far, with the little time it ran before the seal split, it was excellent. Much smoother idle, quicker pickup from low revs and much much smoother accelerating. I used to have a couple of flat spots and some hesitation when I put my foot down and with the boost turned up about a 1/4 turn it was a really good improvement.

If I can get this seal fitted properly I'm sure it's a worthwhile investment. £81.89 from Demon Tweeks around the corner from my works and only about 20 minutes from start to finish to fit (unless you're me in which case about 2 weeks).

[clive f]

you shouldn`t be able to see the o ring at all, but you have to fit it to the valve first as is pushes up against a plastic collar, then try pushing and twisting at the same time to get it to insert properly in the fuel rail, you`ll know when its in properly as you won`t be able to pull it out again without a great deal of effort, also, this is hard to explain without a picture so here goes, the plate on the valve that clamps to the plate on the fuel rail, turn this 90 degrees when trying to fit, this allows you to push in slightly further to enable the o ring to locate properly, it will come back up a little so you can rotate it to bolt it in place.
hope this works.

since fitting mine I have found it a lot more responsive from low revs, fuel economy obviously goes down a little, but on the whole it is better with than without.

[wonderland]

Thanks for the info Clive, it's a big help getting feedback from someone who's had the same problems and found the solution. 3 cheers for the forum i reckon!

[heyiga]

on a slightly different note, I bought both types of FSE valve when I fitted mine (which turned out to be the most expensive, remote mounted type) so if anyone here needs a brand new standard version, let me know. Would rather you guys had it that just sell it on ebay.

[S3_Steve]

Is it the vertical or horizontal one? If it will fit a standard S3 then you have a buyer.

Steve

[heyiga]

Hi steve,
It is the FSEPBV39430 version, cost me £87.77 all in. Although I have read most of the threads on the vert / Horiz issue, am still not sure

I think it is the vertical one, seems to be fitted to later cars, but best check the code!

Hope this helps

Ian

[S3_Steve]

Thanks Ian
I will check it out later today.

Cheers

Steve

[F908 Tim]

Hi James.
Hope you are now sorted.
If Steve does not want the FSE or its not suitable for his S3,then I would be interested... if its the verticle mounting type.
Thats to say that the two bolts that secure the valve to the fuel rail are fitted vertically, and not horizontally.
Let me know if its still for sale will you,and if its this type.
Cheers, Tim.

[S3_Steve]

Hi Ian

On closer inspection I would need the horizontal bolt version (same as yours). Thanks anyway.

Steve

[heyiga]

Just to clear up any confusion, this is the FSEPBV39430 valve.

Ian

[KentishS2]

heyiga said:

Just to clear up any confusion, this is the FSEPBV39430 valve. Ian

This example is a vertical bolt version, just to clarify

[wonderland]

Yup, it's the vertical bolts one, same as I have now finally fitted to my 1989 S2 V6, and it's worth it once it's working properly