Ok I am planning on keeping my airpump on my car because otherwise I can't make it through inspection. I know I am in need of a new one because of the symtomatic mooing. I have gone through my original one and a used one I purchased. I was wondering if there is a cheaper alternative to a new one from mazda at $800 some dolars and a used one that might last a month. Please help me on this as my inspection is up in a month and I want my car back together and inspected before race season.

 

just buy a used one for $50 here on the forum .

 

its used or remove. those are the options.

 

Woah, man, the "mooing" sound is NORMAL. It does not mean anything is wrong with the air pump, in fact, the opposite!. I hope you aren't going through money and effort just because of that, because if so, you're replacing pumps that still work......

 

I have had a couple of signs of smog system failure. One is that my idles gotten lumpy and hasn't been pulling the vacuum it should. Another is that I used to get that backfire or slight popping when I let off the throttle and the cat burnt up the fuel. Another sign is the mooing which went away after I replaced it last time. It is a lot of things, but I am buying a Bonez high flow cat in the next week or so just to replace the stock cat for efficiency as well as performance reasons.

 

While the air pump failing can be a cause of your idle symptoms, so can many other things. And a fully functional air pump will cause a "moo" sound with an open intake like your Apexi.

 

How can you diagnose an airpump then? How can I test it? I can't find anybody with any way to diagnose problems with the airpump? It is kind of like a rare disease that is found by rulling everything else out. All i know is that the last time things like this were coresponding with one another it was the airpump. I changed it and I was able to pass inspection.

 

A used one off here should last for a long time...if this last used one really did "go" on you, it was just a case of bad luck. Get another used one. I actually recommend taking it off and getting the pulley kit...then pay some inspection guy to pass your car