When will it end? I have replaced all of the COP coils and the car
runs fine. After about 10 miles of driving the check engine comes back
on. Went to Autozone and they put on their OBD II scan tool. Now I get
a P0420 code. insufficient catalyst. The guys at Autozone said that
miss firing could have damage the catalyitc converter.
This is another $300 item with about 2 hours labor, say $440
installed. But wait, it may be the Oxygen sensors that are bad and not
measuring the input/output of the catalytic converter.
This brings my total up to $2000 for intake manifold, COPS coils, and
the catalytic converter.
So what do I change?
Shoud I ignore the check engine?
Also, the COP coils that I replaced today are made in China.
What is so American about these cars? The design engineering is not
done in the USA, it is outsourced to India and China.