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Andrew850 · Apr 21st, 2021, 23:51

Hi,

Since my post about the cat. things haven't gone well. I found that genuine cats aren't available so I ordered a pattern one and had it fitted by the independent garage I've used for years.

The car ran well when I collected it from the garage but the following day it started running rough and the engine management light came on. I limped down to the garage and they read the fault code - it was the lambda sensor downstream of the cat. They recommend replacing both lambda sensors - NGK is what the local supplier can get.

I think it's highly unlikely that the lambda sensor(s) have failed. I suspect that what AndrewC1256 said is what is happening - the pattern cat isn't suitable for the car.

I've brought the original cat home and am going to try to repair it with chemical metal and to put it back on the car - and try to get a refund from ebay. If the car runs well with the repaired cat I'll try to source a good used genuine cat.

Does this make sense? Any suggestions welcome.

Thanks,

Ai.

Apr 21st, 2021, 23:51	#4
Andrew850 Junior Member Last Online: Apr 23rd, 2024 22:05 Join Date: Mar 2007 Location: Inverness	Hi, Since my post about the cat. things haven't gone well. I found that genuine cats aren't available so I ordered a pattern one and had it fitted by the independent garage I've used for years. The car ran well when I collected it from the garage but the following day it started running rough and the engine management light came on. I limped down to the garage and they read the fault code - it was the lambda sensor downstream of the cat. They recommend replacing both lambda sensors - NGK is what the local supplier can get. I think it's highly unlikely that the lambda sensor(s) have failed. I suspect that what AndrewC1256 said is what is happening - the pattern cat isn't suitable for the car. I've brought the original cat home and am going to try to repair it with chemical metal and to put it back on the car - and try to get a refund from ebay. If the car runs well with the repaired cat I'll try to source a good used genuine cat. Does this make sense? Any suggestions welcome. Thanks, Ai.