RE: 95 525i M50 Running BAD

I'm convinced my cat converters are the problem will know soon
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posted previously by me..............
Hello All, I appreciate all the replies.
**Note: Thru all this I've never gotten a check engine light, and the "stomp test" comes back clean. **Coils look good visually, verified battery voltage at all 6 connectors, and verified resistance of 0.6 ohms on all six. **I agree w/ Don about the car should still run with low octane, but knock sensors should retard timing and performance would suffer. I've been thinking for some time (even before it started running bad) that one or both knock sensors were bad, because I get lots of pinging when using low octane fuel, but I've never worried much about it becaused I normally use 93 Oct anyway. And I've never gotten a trouble code for the knock sensors. **I'm beginning to think something is keeping trouble codes from being stored???Is this possible? **I was thinking MAF also. I have a used MAF on the way from a salvage yard, should arrive tomorrow. **If that's not it, I'm thinking OXYGEN SENSOR. Car has 150,000mi - probably could benefit from a new one anyway. I will test as per Bentley, but even they say that the test won't be 100% conclusive with an exhaust gas analyzer. **If still no cure, I may break down at this point and go to the dealer for a diagnostic. **QUESTION- Could a clogged catalytic converter cause these symptoms? **QUESTION- Could all the crazy fuel additives and Oct boosters I ran for those 3 to 4 days have fouled the OxygSensor (or just pushed it into the grave it was already leaning over)?
Thanks for all the good stuff guys!!!!
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the additives you put in may have pushed it over the edge
I suggest you post your problem here... http://www.bimmer.info/forum/forumdisplay.php?f  they deal with thAt all the time and it is a very busy board, so the answer should come fast, they specialise in e34 like yours.
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