Finally after much trying got hold of a 375ml can of this at exorbitant price £11.74 MOT centre told me to put it in the fuel filter and bit left over in the tank.
Before Forte Average emission test 3.29m-1 (Fail as limit 2.5)
After Forte and 15 mile full throttle run Average 1.21m-1. Oh joy!
(Did try other brand Injector cleaner from Halfords before in the tank but did not help)
Wonder if the secret to get quick results was putting the fuel additive in the Fuel filter?
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It can be advantageous to put half the can in the filter, then the remains in the tank, but I suspect the 15 mile blast cleared the exhaust system of any residual muck and then ensured a test pass.
That Forte stuff seems wildly expensive - you paid twice what we retail it out at!
We put a fuel additive in every car - petrol and diesel - which comes into our workshops for service - we have not had an emission test fail yet. (Except for damaged things like catalysts and oxy sensors etc.)
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I feel dumb to pay it but no one else seemed to sell it in Colchester, Essex. Honestjohn recommended it so it was worth a try.
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Best place to try I think is a car dealership with workshop attached, esp Ford&Peugeot,as I've seen it advertised as being used in their services.
I've JUST got some at my friendly Peu/Ford dealer - the serv recep guy said "You can HAVE that!" ie FREE! - I guess he couldn't be bovvered with paerwork for about a fiver!
(Haven't tried it yet)
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The trouble with this sort of stuff it it's haz-chem. To supply it to punters in the UK it would have to be fitted with childproof bottle caps, and there are probably other restrictions as well. That's why VAG's excellent petrol fuel system cleaner (the proper, highly concentrated variety) is so hard to get hold of.
HJ
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