of course they said that- they didn't se acel so they decide it isn't the cat. and yet cats fail all the time without a cel. we have seen cats that threw no cel yet when opened the mesh fall ou tin little chunks.

so beyond checking for cels did they actually drive it an experience the problem as you describe? did you go with them on this drive to point out the problem?

 

i tried seafoam today and took the car out for a drive but it didnt help. the dealer took it for a drive and senced the power loss but i dont think they took the cat down to look at it. they normally only chek for CEL lights. i'm gonna take it back to them cuz my engine light came on now but dont know what code its giving me i left my scantool at work. i dont want to take my cat down at my work cuz then they're going to say i did it on purpose and broke the warranty.

 

It takes more then a ride or two too remove build up. You are diluted a lot more then a dealer ZOOM cleaning so this takes awhile.

 

well i took it back today so they can run a deeper diagnosis and they wont tell me anything till tomorrow. they're telling me it's posible to even be the mass airflow sensor.

 

well the dealer finally admited that it was that cat so they replacing it and the rest of the exaust cuz it ended up affecting the muffler but it got cover under warranty.

 

Thats great they covered it all, hope thats it!

 

does anyone actually understand what i typed there? my gawd that's awful typing.

 

for some reason the first time it did but now it seems a litle hard to read

 

I have an '04 that does the same thing... When it gets to 4000 rpm it cuts out and at 5000 its smooth again.... I put ignition coils and plugs and cleaned my MAF, and MS CAI and it still does it.. Let me know if you do the seafoam and how it helps... I am pretty sure I have carbon build up,,,, I just turned 113000 miles on Original engine...

 

well the seafoam didn't really help since the CAT was completly melted out, so maybe it'll help with yours. if not, you might have the same problem i had.