I went to muffler shop today to get my turbo xs hfc put on. And after the took the stock cat of the mechanic came straight to me and said this converter is beyond bad. Actually "Burnt" was the term he used. I don't get it, i havent had a tune or done anything to the engine or cat. But with 19k miles its burnt out, did i do something or does this happen alot?

 

If your car is completely stock, Mitsu is required to cover it until you reach 100K miles by law. This is one warranty claim they cannot deny if you go in completely stock.

 

Thats a factory tune for you.

 

they told me the same thing when i replaced mine with the perrin hfc i had 17k miles

 

did they keep the cat?

 

no i have it, ill put up pics later

 

just ruling out the "well he doesn't need it anymore so I will take it and sell to metal recyclers" theory

well the early 08 did run VERY rich, and that can cause early cat blockage.

when did you get the 08? and have you had the dealer TSB's done?

 

i got it in may 08 and im still new on terms what is tsb?

 

technical service bulletin

essentially Mitsubishi HQ telling dealers to apply a change to the car (whether mechanical/electrical or software)

the 08 GSR's had 4 different flashes 52680015 -> 52680017 -> 52680018 -> 52680020 to fix various problems.

if you are still on 15 or maybe even 17 your ECU is putting WAY WAY to much fuel into the engine.

my advice:
find someone (or tuner) on these forums that has a Openport20 cable, get them to download your ROM and work out which version you have.

if its pre 20, put the cat back to stock, take it to a dealership and tell them to fix the cat AND flash you to the most recent software on your ECU

 

What color is the inside of the cat? Is it partially clogged, melted and black?

 

Wow that's crazy. Getting a high-flow/test-pipe cat is looking like a better idea everyday, haha

 

Yeah curious to see pics

 

If your cat isnt working properly wont that just cause a CEL?

 

yeah its meant to but the design of the system means its not 100%

 

This car is less than two years old and i knew parts wouldnt be shiny but this doesn't make sense to me. Is the 08 running that rich or do i still have alot to learn about cars?