Hi all, I have been chasing a possible CAI problem for 2 years and about $1K invested. I am original owner for 2000 TJ (federal vehicle from Colorado). Short story is factory catalytic converter started to rattle at 50K miles. Yes, only 50K on my "baby".
I live in CA now and there are no factory cat available these days, so performance muffler shop installs a generic Catco brand. Well, I have gone through 3 more cats in the past 15K miles and many mechanics + dynomometers all say everything is working fine (no leaks, no lights, trimming out fine) and they don't understand.
Yesterday, took to Jeep dealer. They monitored the O2 sensors and showed me lagging response to changes in airflow.
They claim that my Rock-It brand CAI allows too much airflow for 2000-era software and O2 programs to compensate. This sends too much gas to carburetor and creates a HOT catalytic converter and too hot for aftermarket cat. They say the factory CAI is balanced for the software and exhaust system.
These are seasoned Jeep mechanics with Chrysler diagnostics (not the SnapOn stuff).
1.) What do you think?? I am going to put my factory CAI back on.
I live in CA now and there are no factory cat available these days, so performance muffler shop installs a generic Catco brand. Well, I have gone through 3 more cats in the past 15K miles and many mechanics + dynomometers all say everything is working fine (no leaks, no lights, trimming out fine) and they don't understand.
Yesterday, took to Jeep dealer. They monitored the O2 sensors and showed me lagging response to changes in airflow.
They claim that my Rock-It brand CAI allows too much airflow for 2000-era software and O2 programs to compensate. This sends too much gas to carburetor and creates a HOT catalytic converter and too hot for aftermarket cat. They say the factory CAI is balanced for the software and exhaust system.
These are seasoned Jeep mechanics with Chrysler diagnostics (not the SnapOn stuff).
1.) What do you think?? I am going to put my factory CAI back on.