Turbo governor - possible cheaper replacement
 

After reading this thread I decided to order up a 'vacuum modulator' from a VW/Audi application to see if it would indeed fit.

I don't know if my own governor is shot, but after 10 years and 230k miles it's probably past it's best - and for the cost involved I thought it worth a shot.

I ordered this part from GSF and used the code 'offer10' to get 10% discount. The part arrived next day at a cost of £32.82 all in. I believe the Volvo part is in the £150+ region, so that's what makes this look like a worthwhile exercise.

On first inspection it looks very much like the Volvo part (I can't make a direct comparison until I have the original removed). One primary difference is that it does not have the 'filter' over the exhaust/inlet, but I figure I can probably swap that part over.

The other (pretty crucial) difference is that the electrical connection seems to be some kind of VAG/Bosch thing and not what Volvo use. This will slow things up but won't stop the project. I intend to visit the scrappies at the weekend to see if I can plunder the appropriate connector, failing that I have found one online supplier so far - but it looks a bit expensive for what it is.

I'll update as and when I make progress.

Pics of the item received today:

http://i1072.photobucket.com/albums/...ps9c67cd7a.jpg

http://i1072.photobucket.com/albums/...psf6a5f870.jpg

i do hope it works as that is a very good saving, as long as at the outport you get 25hg at idle and that figure changes when the throttle is applied for £33 its worth a punt:thumbs_up:
mike

http://www.thetoolboxshop.com/0-011-...way-2436-p.asp
any good.
mike

I love threads like that "Beating the system" is a great hobby of mine

good luck

Thanks for that Mike, it may well be a connector like that that'll do the trick.

I had originally figured it might be like this one, but you've put a doubt in my mind now.


http://www.simtekuk.co.uk/cdata/1094...94_2206294.jpg

All fuellprep equipment is bosch on these volvo's
I needed last year a few new connectors for the fuelpump and railpressure regulator
Your local Boschservice will have them

I had another look at the GSF website and it looks like this part would be a direct fit, albeit the price is £85.20.

I'll persist with the one I have, as a £50 price differential is worth a wee bit of wiring adaptation.

I'm not likely to get to the scrappy until tomorrow, so no progress likely until then at the earliest.

I managed to get finished from work in time to get to the scrappy today and I've found the connectors I need.

For reference I removed them from a VW Golf and Audi A3 (I took 2) and both were used to connect the windscreen washer pump.

£2 later I've got 2 of these:

http://i1072.photobucket.com/albums/...psf5631d84.jpg

More to follow when I get round to attempting to fit the governor.

looking good:thumbs_up:

Time for an update...

Last weekend I tried to measure the output from the vacuum pump and managed to convince myself it was faulty, so I located a used spare and fitted it today.

Having done that I measured the vac again and was only getting 10in/hg at any rpm.

After a bit of dismantling and measuring with a vacuum test pump I discovered that my governor was actually faulty, so this replacement exercise is actually required after all.

As per previous posts the connection on my new governor is not the same as the Volvo unit so I started there.

I was going to cut and splice the VW connector I got from the scrappy into the loom, but I had a change of heart and decided to make a patch lead just in case I wanted to revert to the original part.

Using the VW connector shown in a previous post, I attached a connector I bought from ebay. I'm sure these could be bought cheaper if you have a Farnell account (or similar), but I was pushed for time.

Comparison of original governor connection and new plug:

http://i1072.photobucket.com/albums/...vernorplug.jpg

Patch lead made from VW plug and new plug:

http://i1072.photobucket.com/albums/...vernorlead.jpg

Turning to the governor itself, once off it looked pretty identical to the VW/Audi part I had bought new. The main difference seemed to be the filter over the vent pipe.

http://i1072.photobucket.com/albums/...comparison.jpg

Fortunately the vent filter assembly just clips off and can be fitted to the new part, so here is the new governor ready to fit;

http://i1072.photobucket.com/albums/...withfilter.jpg

Actually, it wasn't ready to fit - the new part has slightly narrower mounting slots although this was easily sorted with a round file.

http://i1072.photobucket.com/albums/...ntingslots.jpg

The new governor with patch lead & filter all fitted:

http://i1072.photobucket.com/albums/...rinstalled.jpg

After a brief test drive I can say that I think the car is stronger in the low/mid range - because the VNT will now be working It's smoother at idle - because the vac engine mounts are working, and I think it's less smoky as well. I am also hoping that the fuel consumption will improve, but only time will tell.

I did notice that when stationary (bonnet up) if I rev the car I can hear a venting type noise (dump valve-esque) when the throttle is released. This was not there before (probably due to no vacuum) and is not audible when driving the car.

I'm also happy to say that the persistent ECM6805 that the car has had has now gone :)