Cat completely destroyed
#1
Registered User
Thread Starter
Join Date: Jun 2010
Location: Lancaster, UK
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Cat completely destroyed
While looking in to some pre-detonation issues (at high speeds under load, engine loud rattle/misfire and wont go above 7k rpm) discovered that my CAT is gone!! I mean, completely gone...just an empty pipe.
I have a CEL light too but the only error code is "intermittent MAF sensor" which is odd as I would have thought driving round with no CAT would have thrown some kind of error too. I replaced the MAF about 4 weeks ago and cleared the code, but it has come back. Is it possible the wrong reading from the CAT lambda sensor could give a phantom MAF error code?
Anyway, new CAT installed. But why did this happen?
I've done some searching here and I think next job would be some new coils (am I right?). I am still getting the same mis-fire at high speed/high revs despite the new CAT which is also pointing at ignition problem.
Anything else to check/replace to prevent the CAT melting again?
Any advice on this is much appreciated.
I have a CEL light too but the only error code is "intermittent MAF sensor" which is odd as I would have thought driving round with no CAT would have thrown some kind of error too. I replaced the MAF about 4 weeks ago and cleared the code, but it has come back. Is it possible the wrong reading from the CAT lambda sensor could give a phantom MAF error code?
Anyway, new CAT installed. But why did this happen?
I've done some searching here and I think next job would be some new coils (am I right?). I am still getting the same mis-fire at high speed/high revs despite the new CAT which is also pointing at ignition problem.
Anything else to check/replace to prevent the CAT melting again?
Any advice on this is much appreciated.
#2
Registered
iTrader: (4)
It is possible the maf error caused a lean condition (excessively hot exhaust) that lead to the cat failure. I would think that an ignition problem would create unburned fuel, therefor a rich condition. Too much unburned fuel in the exhaust could also lead to a cat failure.
Along with changing the ignition parts, you may want to check and clean the maf.
Along with changing the ignition parts, you may want to check and clean the maf.
Thread
Thread Starter
Forum
Replies
Last Post
fc2se
NE For Sale/Wanted
2
06-01-2016 08:55 PM
05rx8mazda
RX-8 Parts For Sale/Wanted
18
11-28-2015 09:42 AM
yapakanichi
Series I Aftermarket Performance Modifications
4
09-25-2015 07:55 PM