Evilution - Smart Car Encyclopaedia

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Modification Details

Fuel Pressure Regulator

Difficulty

Credit

CKA / Evilution

Cost

£45

For

Old Style 600cc For2
Old Style 700cc For2
Roadster

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The standard smart uses the same fuel pressure regulator as the Audi TT!
When TT owners get serious with modding they swap their FPR over to a Bosch
4 Bar equivalent FPR. The 4 Bar FPR is standard on many VW and Audi vehicles.

What you will need is Bosch part number: 0280 160 575.

You can buy these from Smartmods and they ship worldwide.

Open the engine cover and prop the carpet up, circled in red is the FPR.

The FPR on early smarts were on the side of the fuel rail as seen below.
Many thanks to John B for the picture.

Removal is very simple, slide the metal clip out by levering it towards the front of the car.

When the clip is out and you manage to find it again, put it to one side.
Pull the FPR from the hole, it can be tricky but pulling and wiggling will work.
Cut off the zip tie and pull the hose from the old FPR.

Clean the hole up with a lint free cloth, make sure nothing falls into the hole.

The new FPR is on the left, the 2 look identical except for the colour coded ring.

The bottom view shows a slightly larger central bore and a gauze filter in the new FPR.

The new FPR clearly states (depending on your eye sight) it is a 4 Bar FPR.
The original FPR has no rating marks on it, just a part number.

Before the new FPR is pushed into place, the rubber seals should be lubricated
to aid fitment and allows the O ring to slide in and seat correctly.

Correct use of lubricant is important.
WD40 is spirit based like petrol so can be used.
Silicone grease shouldn't be used as silicone will not be broken
down in petrol and won't be properly burnt if it enters the engine.
Engine oil shouldn't be used as it is too thick and may clog the filter.
Sexual lubricant can be used sparingly.

Hold the 4 Bar FPR in place and push down with the palm of your hand,
It will slide in and seat with a satisfying and clean downward movement.

Replace the clip while pushing the FPR down to ensure a good fitment.

Reconnect the hose and fix with a zip tie or two.

That's it, all done. Go for a ride and see if it makes a difference.
Check the area around the FPR for leaking or problems afterwards.

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