Been told that putting a normal cat pipe on the car to pass the MOT could cause problems with the remap. Can anyone explain what these problems may be as the car seems to be running fine.

Cheers.

 

well ive never had a problem. been putting mine back on for the last three or four years> Mind you ive never caned it. Just driven normally to and from mot station

 

cheers

 

your only putting the cat back on for a short while it wont do anything , why should it your not changing the map are you, your only going for an MOT, you not running a highly tuned super car,LOL.

 

It will affect the map but if anything it will slow the car down due to restrictions, I doubt your gonna do any damage driving to an MOT station and if you are drive off boost and it will be ok.

 

You never said that you were only putting the CAT to pass the MOT, in that case it's fine. Just don't go boosting your way to the MOT.

 

What car and what ecu?

if just for mot then no issue just stay off boost, but ensure the garage don't take it for a joy ride.

the boost may drop a little and the spool up be more lazy but no point risking it as the more restrictive exhaust will effect ignition the engine will take etc

Simon

 

I was just going to run it without putting the decat downpipe on.

The garage I bought the car from swapped the the pipe for a standard one to pass the MOT. They sold the decat downpipe. I would have to purchase a new one to set the car back to the way it was remapped by JGM as when it was mapped it had a decat downpipe on it.

However I would just keep the car the way it is now, obviously running less bhp if i thought it would be ok and would not damage the engine while hoofing it around.

However if the engine will sustain damage i will have to purchase a new decat downpipe to replace the legal one thats on.

 

I think we covered it in the other thread.. lol