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I agree with Bruce....typical symptom of blocked cat 200 1987

I have read several threads on BMW BB about this similar problem....especially on the 5 sereis like my 528i. If the cat goes, it could cause loss of power. Has something to do with plugged pipes, etc. You can test this by sorta 'shaking' the cat...any rattle...then it's time for replacement (percolate also mentioned that this problem could be attributed to the cat).

I think eEuroparts.com sells one for less than $110 with shipping. Have Midas, Monro or any of those monkey joints install it for you. Shouldn't cost more that $60.

I wouldn't rule out bad wiring harness either, but check the cat before you jump into the whole wiring stuff.

Good luck,
SM
--
90 BMW 325is, 98 BMW 528i, 90 Volvo 240DL






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