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  1. E46 General
    Does anyone know why are there three different check valves in secondary air pump system? One way valve (black and white), relay injection valve (back of intake manifold) and the one by the pump itself. Another question is where does it inject air? Intake manifold? Or exhaust? Just curious...
  2. E36
    I am trying to pass smog in my 2000 Z3m coupe (s52 All stock with 67k miles shouldn’t have many worn down parts. Also cold start is rough and a bit low in rpm’s (900 down to 700) my only thought to what might be causing it not to pass Things I’ve done to ensure nothing is wrong: -cleaned and...
  3. E46 General
    My 325ci has had the p0411 code for a while now and I'm trying to fix it. I already checked to make sure that the pump is blowing air on cold starts. I just cleaned the secondary MAF and the connectors and the secondary air filter looks fine. All the hoses are in good shape so my problem must be...
  4. E46 General
    Guys I'm desperate for help. SoCal car-short 5 mile drives typically-no codes thrown in years. I go to smog and get booted for "secondary air not ready". Peak tool reads no codes. Cleared anyway. I do some research and check engine during cold start. The air pump works for about a minute, the...
  5. E46 General
    I have a dead 2002 325i throwing codes P0491 and P0492 which are secondary air codes. I suspect I've had secondary air issues for awhile as it would die sometimes at the first stop sign the moment I'd get on the gas. Anyways, there was never a SES light until today, and today it won't start at...
  6. E46 General
    My car has developed a problem where on a cold start the engine will idle around 1100 RPM before slowly dropping to around 1000 and then after a few minutes to the normal idle. When the engine's warm it idles normally. I've scanned for codes but its giving none. :thumbdwn: Here's a video of the...
  7. E46 General
    My 330ci just threw up a check engine light so I went to check with my code reader (this is a craftsman code reader btw not a BMW specific one) and the code the reader pulled up was P0492 for secondary air flow. I thought okay great it's probably a valve or vacuum line. Awesome. I LOVE working...
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