Roadster Cat

[madboy]

Hi guys,

I am getting the "heat" light on my dash from the import roadster's cat converter, starts out very faint, gets slightly brighter after a few minutes, I understand that this is not something essential for aussie epa standards?

Is there a fuse somewhere i can pull to turn this thing off? what happens if i remove the stock cat for a high flow? does this thing affect the ECU is anyway?

cheers
MB

[grump]

My light comes on when I turn the ignition on but goes off when I start the car.

[mx5racing]

If its an original 89/90 model then there is a plug you can disconnect next to the cat. Follow the wire from the the sensor in the cat and you will find it. It's just a plastic one that easily disconnects. Won't affect the ECU/tune at all so you can fit any style of cat.

If the cat is overheating its usually due to unburnt fuel that may have caused a partial blockage of the cat which restricts the flow and gets hot. Dodgy O2 sensor can be the cause of it, along with a few other things.

We use a infa-red thermometer to check cat heat so perhaps see you local exhaust guys to see if they have one - they are a great way to find all sorts of problems.

Be careful as a partially blocked exhaust can get incredibly hot. Even when some parts can be touched others will fry your hands!!

[madboy]

If its an original 89/90 model then there is a plug you can disconnect next to the cat. Follow the wire from the the sensor in the cat and you will find it. It's just a plastic one that easily disconnects. Won't affect the ECU/tune at all so you can fit any style of cat.

If the cat is overheating its usually due to unburnt fuel that may have caused a partial blockage of the cat which restricts the flow and gets hot. Dodgy O2 sensor can be the cause of it, along with a few other things.

We use a infa-red thermometer to check cat heat so perhaps see you local exhaust guys to see if they have one - they are a great way to find all sorts of problems.

Be careful as a partially blocked exhaust can get incredibly hot. Even when some parts can be touched others will fry your hands!!

cheers, for that info, dodgy O2 sensor would make it run rich right? might be causing the backfire's i am getting when shifting into 2nd after planting it?