Fuel Presure Regulator

[John Maddox]

944T let me down while in the lake district when the fuel pressure regulator on the fuel rail failed. Symptom was running rich with lack of power on boost and a little black smoke from exhaust, then total failure and engine wouldn't run. RAC trailered it home.

Here is the important bit - fitted new regulator and it felt 50 hp up on how it always felt before. It is now very significantly faster than before. Only cost £32 +vat direct from Bosch (Half that of OPC).

If you think your 944T is not as quick as it should be this is worth replacing.

 

[berg944]

What does it look like?

Photo will do

Mike

 

[Guest]

Here it is...

 

[berg944]

Thanks Slim,

If that one regulates the pressure, What does the other one do?

Mike

 

[John Maddox]

Well done, beat me to the photo. The other is a fuel damper- stops the pulses from the pump I think.

 

[Guest]

ORIGINAL: Lost Cause

Very interesting this, as I think maybe I'm suffering the same symptoms (at a complete guess).

So, if this a numpties DIY fit - or a four hour session at the garage? My service/garage is quite happy to fit parts I've bought elsewhere - so if this is a quick one then I might just go ahead and do it anyway ?

10mins to fit..At the most including stopping for a coffe and bourbon.

 

[944Turbo]

Be carefull though might have some high pressure fuel behind it. Do it on a cold engine and cover with a rag.
Tony

 

[944Turbo]

2 hoses, one with fuel in (jubilee clip or bolt on depending on year) and one vacuum/boost just pulls off (or blows itself off as mine did at snetterton) 2 bolts to undo and pull it off. Undoing the fuel hose first releases most of the pressure.
reassembly is reverse of removal.

If you get a guru/promax kit you get a nice shiny new uprated FPR plus some chips to take advantage of it.

A boost leak may give similar symptoms (running rich) and more likely, haven't heard of an FPR failling before but the rubber is getting old.

Tony

 

[Diver944]

Yep it's very easy. Using the above photograph:

1. Let car stand for a few hours (or overnight) to allow fuel pressure to drop. Or place a rag over the FPR when you finally remove it. Goggles would be wise as petrol stings (ask how I know [] )

2. Pull off the rubber pipe to the left of the FPR

3. If you have a later Turbo undo the nut on the thick hose to the right of the FPR. Earlier cars have a pulloff hose and a hose clamp (my '89 one was pull off).

4.Undo the two nuts holding the FPR in place and remove. It's very tight to pull off the fuel rail. THIS IS WHERE IT WILL SPRAY A BIT OF FUEL and maybe propell the old FPR across your garage (again ask how I know [])

5. Stumble around the garage with stinging eyes trying to find your old FPR []

6. Installation is reverse of.....yadda yadda yadda []. Make sure its pushed fully into the fuel rail. The two bolts will 'pull' it into position

DON'T have a celabratory cigarette, and the car may need a few cranks to start whilst it builds fuel pressure

 

[John Maddox]

I had same trouble with Bosch web site but used the site to locate a local Bosch agent who ordered it - only took two days to arrive from Germany. You will need to take off the old one to get the part number (Good practice!!) as I think it is stamped underneath from memory.

John M