Hmmm, that not what i've read, air injection from an air pump is used so that incomplete combustion products have a chance of being oxidized in the hot exhaust manifold. Also the unburned hydrocarbons.

The fact is that on an A series engine, these air pumps created more drag, more energy was needed to turn the pump, & hence more pollution was created, the tests were done by the factory prior to fitting them for for sale to suit the new the ADRs & yet the Govt didn`t care, they just wanted the new cars of the day to be "SEEN" to be doing something to combat the air polution problem & basically told Leyland that if they weren`t fitted then they weren`t selling their cars here. So they fitted them & were able to maintain car sales.

simple as that...Them`s the facts.

sad hey?

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

In a ideal world the pumps where added to decrease certain types of pollution, not greenhouse gases, they where the attempt at decreasing NO, CO, HO, produced by the engine, cars these days have cat for that purpose i believe.

However depending how they were designed and implement the outcome could of been anything.