A device used in vehicle exhaust system to lower exhaust emissions of harmful gases.
it's ripe.
clogged up catylatic converter.
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It is on the passenger side just above the catylatic converter.
same problem with our old marquis. catylatic (sp?) converter is plugged remove it
Possibly the Catylatic Converter. fuel pressure regulator
catylatic converter is plugged
No. Is illegal, will turn the check engine light on, will hurt economy and performance.
On the top of the exhaust manifold is where the O2 sensors are located. There is an upstream and downstream sensor on each side of the engine. If the sensor is sensor 1 position 1, the sensor 1 means it is on the side of the first cylinder and position one means it is before the catalytic converter. If the sensor is sensor 1 position 2 it would still be on the side of the first cylinder but after the catylatic converter.
I believe they are welded in. Has to be cut out and the new one welded back in.
5 inch straight pipes with no catylatic converters. If it is a diesel, DPF delete and 6 inch straight pipes.
They is an o2 sensor before and after the catylatic converter. Jack up the front of the car support it with axle stands. Just behind the catalatic converter there is what looks like a bolt with wires coming out of it. That is the down stream o2 sensor. Look for the same thing on the exhuast between the catalatic converter and the engine and you will find the upsteam one. You maybe better off taking it to a garge to get the trouble codes and fix out the root of the problem. Emission parts can be costly. Be gentle when loosening the o2 sensor. Spray the WD40 to it and let it sit over night. If it still doesn't want to come off try tightening it slightly then losening it.