Catalatic converter

[Steven206Seattl 10+ year member]

fix it and put a whistle tip.

" the whistles, the whistles go whhoooo whoooo" Bub Rub...

JK do not do the whistle tip

 

[Racerx250 10+ year member]

Actually the o2 sensor after the car does nothing performance wise. It is to tell your cars computer that your cat is not working properly. It will not affect performance. Maybe gas mileage, but not performance. If the cat is busted or not working correctly the o2 sensor will throw a code causing your service engine light to come on.

As far as a new high flow cat. It depends on the shop you take it to. I got a high flow cat for my firebird. Costed me 120 total. If you need some help shoot me a pm. I'll help the best I can.

 

[bad @SS chevy 10+ year member]

any cat cleaning solution?

 

[Steven206Seattl 10+ year member]

I had a converter on my car a few years ago when I bought a few years ago and that was clogged so much. The car ran like shit and got horrible gas mileage too. Now it's got dual flowmasters but still is horrible on gas

 

[Steven206Seattl 10+ year member]

Actually the o2 sensor after the car does nothing performance wise. It is to tell your cars computer that your cat is not working properly. It will not affect performance. Maybe gas mileage, but not performance. If the cat is busted or not working correctly the o2 sensor will throw a code causing your service engine light to come on.
As far as a new high flow cat. It depends on the shop you take it to. I got a high flow cat for my firebird. Costed me 120 total. If you need some help shoot me a pm. I'll help the best I can.

Yeah but then when you try to sell it you gotta fix it

 

[Steven206Seattl 10+ year member]

any cat cleaning solution?

you can hollow it out but that's the ghetto way. Its called Gutting the Cat

 

[bad @SS chevy 10+ year member]

I have flowmaster exhausts. But i think the cats are stock. would a bad cat throw a misfire cyl 3?

 

[Racerx250 10+ year member]

What engine is that 3.8 v6 series 2?

 

[Racerx250 10+ year member]

If it is then I will bet almost anything you sir have a bad coil pack. Does it misfire all the time or only with moderate/heavy accelertation?

 

[bad @SS chevy 10+ year member]

yes 3.8 v6 series 2..... im pretty sure its the cat converter,

 

[bad @SS chevy 10+ year member]

If im on the gas, full throttle its fine. Shifts great. The problem im facing is at medium acceleration. Im getting a shutter/bog/bouncing idle. Sometimes it feels like it doesnt want to shift. its really bad @ the 45-50 gear shift.

 

[Racerx250 10+ year member]

Correct. Your cat probably is bad. But still won't cause your misfire.

 

[bad @SS chevy 10+ year member]

but i havent noticed a misfire?? Engine wise it seems to run fine @ idle.. Doesnt a misfiring cyclinder affect your idle?

 

[Steven206Seattl 10+ year member]

Do the cat first then you may need a new coilpack. Good thinkin racer. You're probably mistaking the misfiring with something related to the converter though

 

[bad @SS chevy 10+ year member]

So when i Call a muffler shop tomorrow. What should I say?