Happy Friday everybody,

I’ll be as descriptive as possible: My catalytic converters are now rattling within the last week, and they were replace 3 months ago. I run only 91 octane gas. Now if I replace them again my concern is it’s just gonna happen again unless I track down this problem. It is throwing a code as well (Code 32) I was going to run some sea foam through the fuel system and see if that would help clean the injectors but I’m looking for suggestions on tracking down this problem. Here are the things I’ve done in the last 3 months:

New: Spark plugs, wires, O2 sensors, fuel pump +filter, serpentine belt, rad hoses, thermostat, Fan switch, oil pressure switch, water pump, just to name a few.

 

I did the seafoam treatment to clean the fuel injectors, I have to say I noticed a big difference when I pressed on the accelerator. A little white smoke came out, but I did notice the rattling stopped, probably because the honeycomb element inside might already be gone.

If that’s the case I might have to get new cats again. I think this time I’ll try doing the exhaust myself. I’m going to do one more treatment of sea foam just to be sure.

 

Catalytic Converter Break In

1. Start up the engine and let it idle until it’s warmed up. Do not rev it.
2. Once the engine is warm, or after around 5 minutes, increase the RPMS to around 2500 for around 2 minutes.
3. Return to idle and turn the engine off.
4. Let the car sit until it’s fully cool.

That’s it! By doing this procedure, you slowly bring the brand new components up to temperature, without exposing them to high heat or gas pressure. This allows all the materials to expand and set, including the ceramic substrate and matting which is installed in a compressed state. During the partial throttle stage, you are effectively burning off the binding that keeps the matting compressed. If you install a new cat and immediately gun it out of your driveway into the street, you can dislodge these components and cause them to break free, rattling around in the shell and reducing the overall effectiveness of your new catalytic converter.

Cat Break In