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Evil Joe · 03-23-2003, 07:47 AM

Although I've thoroughly searched the forums, I am still confused about the purpose the smog pump. As far as a I understand, it basically has two purposes:

1.) Pumps air to converters to aid in oxidation.
2.) Pumps air directly to the exhaust manifold to also aid in oxidation.

It seems that in case #2 - the pump would have trouble pushing air into the manifold because of the high exhaust pressure.

Is this correct??

Finally, if I by-pass the pump, do I have to worry about plugging the heads? (What is the purpose of even plugging the heads?) Right now, I just removed (completely) the metal tube that goes from the H-pipe to the rubber connector. (My H-pipe does not have any converters nor is there is a boss/port for this tube.)

Is this okay or should I plug that hole in the rubber connector?

(I dont want to pull the whole smog system because I live in CA and I have to deal with the periodic smog checks...ugh!)

03-23-2003, 07:47 AM	#1
Evil Joe Registered Member Join Date: Nov 2002 Posts: 23	Smog Pump Confusion Although I've thoroughly searched the forums, I am still confused about the purpose the smog pump. As far as a I understand, it basically has two purposes: 1.) Pumps air to converters to aid in oxidation. 2.) Pumps air directly to the exhaust manifold to also aid in oxidation. It seems that in case #2 - the pump would have trouble pushing air into the manifold because of the high exhaust pressure. Is this correct?? Finally, if I by-pass the pump, do I have to worry about plugging the heads? (What is the purpose of even plugging the heads?) Right now, I just removed (completely) the metal tube that goes from the H-pipe to the rubber connector. (My H-pipe does not have any converters nor is there is a boss/port for this tube.) Is this okay or should I plug that hole in the rubber connector? (I dont want to pull the whole smog system because I live in CA and I have to deal with the periodic smog checks...ugh!)