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'04 4200 Coupe Cat problem - suggestions please!

15619 Views 53 Replies 11 Participants Last post by  TravisJ
Hi Everyone........ just run into my first potential problem with my '04 4200GT Coupe CC with only 20,000 miles on it.
I had the check engine light come on. I had it checked out at the Maserati dealer in San Antonio and the fault appears to be that I have an overheating cat on the right hand side. The car seems fine and is drive-able right now, however, It seems quite likely that I will have a problem in the not too distant future. There is no way in hell that I'm going to replace crap with crap (ie stock Maserati parts) so what do you guys recommend? I would like to keep the exhaust similar to stock; maybe just a tad louder as the wife still has to drive it too!
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First off park it. Theres no way in hell id drive it. You could potentially damage the engine if you keep driving. Theres a recent thread in here that JLOBO put up. He gutted his cats and sent his ECU to get reprogrammed and thats what i plan on doin if i ever have to. From what ive been seeing its the most inexpensive way to fix this issue. This really sucks that at 20,000 miles this fails. Its bull
Dude, are you serious?
I'm sorry, but if you're suggesting gutting your pre-cats and getting an getting an ECU remap from Evolution as an "inexpensive" alternative, then I suggest that you think again.
i thought we were talking only about catalytic converter issues. If we are talking about multiple modifications, then that changes the picture.

I think you are missing the point of the fd aftermarket cats. Those are needed to replace contaminated main cats. An ecu remap isn't going to uncontaminate main cats. Moving the o2 sensors has nothing to do with the main cats. It is just a more cost effective method of avoiding a cel. Much cheaper than an ecu remap.
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