I have just put in my third secondary air injection pump into a 2001 GMC Jimmy in less than a year. They keep getting water in them and I do not know why? I think it was changed once before I bought it because the intake hose on the pump had been disconnected and moved up to the firewall. Is there s…

Air contains water vapor. It always has, and it always will. One of the byproducts of combustion is water vapor. More water. “Secondary air injection pump.” What the heck is that? Maybe you should re-connect the hose where it’s supposed to be.

This motor only runs for the first minute or two on start up, and at which point it shuts off along with closing the diverting valve. So have you confirmed voltage at motor by back probing the motor leads, and then turning on the truck? With the air line disconnected from the pump. On start up the …

What does the secondary air injection (AIR) pump do? Haynes Repair Manual says, “The secondary air injection system is used to reduce tailpipe emissions on INITIAL ENGINE START-UP. …The air injection pump is controlled by the PCM (engine computer) through the AIR relay.” So, once the engine warms up…

You probably have a check valve in the plumbing between the pump and each exhaust manifold. It is there to prevent exhaust gases from going back into the pump. I would try replacing both of them.

Thanks for all the answers. The factory realized that they screwed up when designing this system. So the work around is to relocate the intake hose up higher and away from the wheel. My guess is that the dealer is the one that did the fix and it should not be illegal because the factory is the one i…

My information, for placement of the hose, comes from the Service Bulletin #04-06-04-015 (and -015A); which says the NEW hose should end between the battery and the coolant bottle. This AIR pump fix applies to Blazers, Jimmys, Sonomas, Bravada with 2.2L and 4.3L engines from 1999 to 2001 (or, 2003). …

My third pump failed. I put in the fourth as well as replacing the check valves that come off of the exhaust manifold. They were both bad and were leaking exhaust (which includes water vapor) back into the pump causing the failure. Had I changed these to begin with I would have needed only 1 pump no…

I am on my 3rd secondary air injection pump

Maintenance/Repairs

euryale1 December 7, 2009, 1:31am 4

Water can come from a head gasket leak. Do you drive the car regularly. The disconnect on the hose should have been a red flag. IE they did something illegal. You are forbidden by federal law to disable or disconnect emission system components. So why don’t you dump the car? The guy who sold it broke the law and you are the unlucky recipient of a crap car.

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I am on my 3rd secondary air injection pump

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