can any1 tell me why Iam on my 4th catalytic converter with only 74,000 miles. Just had 1 put on in Dec. the 1 b4 that was in April. the dealship trying 2 say its my aem intake... and i get bout 220 miles to tank of gas.

 

Either you are running too lean and the heat is killing your cat, or you are running too rich and you are killing your cat. If you run too long between coil and/or plug changes, then you aren't getting a complete burn, meaning excess fuel and that can fry the cat.

If you have flooded at all on each cat, that can kill it all on it's own.

 

ive changed plugs 4 times ive changed coils and wires. the day i got this last cat put on i drove bout 55miles home and the cat was glowing red i mean HOT. now when i drive my car i dont cut it any slack....

 

What did the dealership say exactly about the AEM intake?

 

Glowing Red CAT just 55 miles? you must be running pig rich at all times but just BARELY under the limit for CEL.

AEM intake causes it ? If you install everything correctly. Send me your AEM logo Pipe I will swap my Mazda speed with yours. Just to shut them up.

Im on my 2nd CAT. First cat died in like 8K miles. now Im at 55K . no problems so far (but Im expect it to die at some point in the near future. just before the warranty runs out)

 

Sounds like they never changed the CAT. The just told you they did.

 

Catalytic Converter is warrantied for 80,000 miles with the EPA. Tell them they need to figure out what is going on. I would suggest putting your factory air filter assembly back on and see what happens.

 

Interesting. Just changed my cat today.

I'm sure it was caused by bad coils.

I'm in central Arkansas .Which dealer are you using?

 

Yes, Mazda has verified bad coils will destroy a CAT.

 

texarkana ORR ive put new coils wires plugs