Can a bad catalytic converter cause my car to turn off right after i crank the ignition?
When i crank my ignition my rpm's go up, then down.. then the car just shuts off, takes about 1-15 trys to actually get the car started when this happens. Could a bad cat be the problem? Because i know my right cat is bad.
If it helps i have a 3.0 quattro. And for the 3.0 owners what your avg miles per tank?

 

i doubt it, but im not sure . it does sound like your air idle control module is gone

 

yeah my b6 3.0 has bad cats also idles funny sometimes i thought tht would be from a bad gas filter or something even tho my car never shuts off but air idle control sounds like would be my prob also.thnx

 

DanaB6, it sounds like you have another issue here. Have you scanned the car for codes? how long has it been since maintenance has been done? I would check primary 02 sensors, coilpacks, plugs, and the MAF sensor

 

Maintenance has been done recently, The car was scanned for codes the only code that show'd up was the bad Cat. We also checked all the temperatures and watched all the levels of the sensors ect. Nothing was abnormal...

 

Maintenance has been done recently, The car was scanned for codes the only code that show'd up was the bad Cat. We also checked all the temperatures and watched all the levels of the sensors ect. Nothing was abnormal...

 

re :magnaflow catalytic converter

My mechanic says the OEM exhaust, do you think a borla catalytic converter could be a bolt on install.