My car has been bogging ever since I installed my Gredy 4-2-1 a while ago. The thing is, it only bogs when the engine is cold. I also put in a Carsound Cat a little after that and it seems like the Cat's internals are busted as it rattles once in a while.

I'm guessing my car is running rich, but why? Could it be a bad O2 sensor? Not reading right until the sensor warms up?

I don't want to replace my carsound and O2 sensor to have it do the same thing again. Anyone have any inputs? Thanks.

Dan

 

Is your problem like this guys:

https://honda-tech.com/zerothread?id=525094

 

Do you still have your heatsheilds on?

 

Sounds like that same problem except I have no CEL. Also all of my heatshields are on except the OEM exhaust manifold shield.