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The air pump does one of 2 things.
#1, does nothing more than provide proof the government approved solution to pollution is dilution.
#2, it may prevent back fires, but on a properly maintained vehicle its not likely any way.
The air pump is just another accessory to turn, it doesn't do anything besides use more fuel. It makes emissions look cleaner by cheating, it blows air onto the exhaust, you would get the same effect by holding the emissions probe several inches away from the exhaust out let. Thats all its doing. It adds air to the exhaust to get tail pipe NOx down, even tho the vehicle produces the same amount of NOx with or with out it.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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