Secondary Air Injection Problem

10

Asked by Guru3BWDS Jul 04, 2020 at 07:14 PM about the 2001 Chevrolet S-10 RWD

Question type: Maintenance & Repair

Hello,

I am having trouble getting my truck to pass smog. They are telling me that
there is an issue with the secondary air injection pump although there is no
check engine light on. Im really just curious on which part I should replace first.
I called around and they said that this is a common issue for this truck so it
would be helpful if someone could point me in the right direction. Thanks for
the help.

4 Answers

10

Thats the problem I don't know because they said it could be multiple things that could cause an error. I guess what I am saying is would it be best to replace the pump and the hoses first and go from there?

1 people found this helpful.

You want a WAG? Scan for codes because there had to be a reason why they said this to you. If there was an actual smog check at the tail pipe give us those numbers.

1 people found this helpful.
158,375

I went down this road a few years ago with a friend's 2000 Blazer. First check the hoses and piping on the system (someone had put a piece of garden hose where one of his hoses should have been). If that's ok, remove the rubber hoses at the check valves and start the engine. There should be no exhaust gasses coming from the check valves. If there is, the check valve or valves are bad. If that's ok, check for a blown fuse for the secondary air pump. It's usually in the front corner of the right front fender. If that's ok, remove the secondary air pump and see if it has water in it. If it does, replace it. The pump is usually located down low in the engine compartment right behind the front bumper. As far as passing smog inspection your vehicle will pass, under Federal Law, with one readiness monitor not set. Doesn't matter which one is not set as long as all the other readiness monitors are set. The air, catalytic converter, and EGR readiness monitors will only set if the gas gauge is between three quarters and one quarter full. So, clear the computer using a scan tool, and drive normally for a few days. Check the status of the readiness monitors. If you can get all but the air system to set, fill up your gas tank and go for inspection. You probably have a pending trouble code that hasn't set and triggered the check engine light or service engine soon light. Hope that helps! Jim

1 people found this helpful.

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