Has anyone used either a DEC or Miller or other brand of cat??

I agree that it’s important to find out why it happened. The article above said the most common reasons were faulty 02 sensor or high oil consumption. The car doesn’t use oil and hasn’t used a measurable amount in the last 4 years. The major problem is lack of acceleration. The car is pokey below 3000 rpm and that is extremely uncharacteristic of the m119. it also has an odd miss fire that only occurs after the car has been sitting unused for a few days. If used daily it never misses but is pokey.

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...Tracy

'00 ML320 "Casper"
'92 400E "Stella"