I currently have a 1988 300zx and I was wondering if I delete the Cat, will it turn on my CEL? Doesn't it all depend on where the O2 senser is? Thanks

 

NO!!!! You'll delete the cat and the EPA will come to your door and arrest you for violating federal law.

 

and would still turn your check engine light because it would end up fouling your oxygen sensor. id say just get a real good and affordable aftermarket performance exhaust with its oxygen sensor, this way your check engine light will not come on and your ecm can get an accurate reading from the sensor as well as get some good hp out of the car.

 

Indeed... they look like this:



Sometimes they look like this:



Blaine, two words: Test Pipe.

 

unless you have a classic insurance for over 25 years old Z(Phoenix AZ)with only 5K miles /Year limit.You don't have to test for emmission.

 

theres no emissions where I live.

 

So... do this....

 

I did a header back exhaust, no check engine light came on?

 

Is this supposed to be a question or statement?

#1: I don't know why we are even talking about the CEL... Does the Z31 even have a check engine light??? ( Nissan Z31 300ZX Warning Lights )

#2: The Z31 only has one O2 sensor, located BEFORE the cat. OBDII cars (96+) have O2 sensors AFTER the cat, which can trip the CEL when the cat is bad / removed.

Moving on...

 

lol idk what I was saying but I meant that nothing happened to my car. and youre right, the z31 o2 sensor is located down the manifold, before the cat.