They won't stop your car overfueling. If it's overfueling then there is an underlying problem that needs to be rectified.

performed a search, but couldnt find the answer..

i am intrigued to know what the impedance or injector flow rates
are for the interchangeable vauxhall fuel plug colours
i have brown 95/98, white 95/98, black 91/95 etc

i have a feeling my car is overfuelling slightly,
i wondered if swapping the fuel plug from black 95 to black 91
(or even a colour with a lower impedance) would make any difference at all?

would this cause any engine damage over time perhaps?


thanks :|