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Originally Posted by BadBrad97
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The dump I got was not from a SDS and I did not get any fuel trim readings.
And I sprayed the cleaner directly into the throttle body without the breather tube in place.
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Never heard of that solving any problems, but I could be wrong. You'll need to use SDS to get real diagnostic info. The reason AutoZone etc. charge nothing for OBD-II code reading is that in many cases, it's useless info.
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Originally Posted by BadBrad97
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But another symptom that my C230 has had for at least 10,000 miles is that there was a BAD hesitation at around 4500 RPM when passing. (AMM?)
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Classic AMM symptom. An AMM showing that can have an adaptation value not sufficient to trip the CEL, but cause running problems. Been there.
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Originally Posted by BadBrad97
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I saw the trick where you put the AMM in a plastic bag with rubbing alcohol and shake it and then dry it and reinstall. I tried it. Prior to doing that, the best I could get from my car was about 1000 RPM, after reinstall, I was able to drive around the block a couple of times at up to about 3500 RPM's with very little missing and actually almost drivable. Impossible before.
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Cleaning an AMM does not work and is a very short term solution at best, as you have found out. It sounds like your AMM is bad if the "cleaning" helped at all.
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Originally Posted by BadBrad97
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If I get it running halfway decent, should I attempt to disconnect the battery and clear the CEL before taking it to the shop? Or just leave it alone?
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Disconnecting the battery is not a solution to a CEL under OBD-II. If you actually solve the problem, the CEL will go out on it's own after a certain number of key-cycles/time/etc. without the problem occuring. Without reading your adaptation values I would guess that you have a bad AMM and probably plug-ends that are in need of replacement. Driving the car with a bad AMM is not kind to it as it cannot operate within the proper fuel/air ratio range.
I would say that you might want to find a knowledgable mechanic. Contrary to what many say, paying for good diagnostic help can actually save you TONS on parts "throwing" as per DIY. The SDS is a valuable tool that can provide incredible information. I had a CEL the other day and my mechanic had the diagnosis in less than five minutes and within ten minutes the problem was solved (the little "tick-tick-tick" emissions valve who's name completely escapes me right now...) The half-hour labour charge was CHEAP compared to the mess I might have created had I tried "tracking it down" myself.