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Tom, I can't agree enough on the Bosch cap & rotor. None of the parts guys near home stock Bosch, so more than one I've had to settle for the black stuff - Standard? Anyway, once I put in a new non-Bosch cap and rotor, and the car refused to start until I put the OLD Bosch rotor back in. Now I always keep a retired cap & rotor set on hand for emergencies.
Also, to second your point about "checking the obvious." I recently acquired a nice '92 245, and am still giving it the full going over. New shocks, IPD bars, fresh filters, etc. I noticed that although it starts easily and runs well in the morning, driving home on hot days there seemed to be an intermittent miss, more like a lean surge condition. All vacuum lines are OK, and I started envisioning a long journey through the fuel injection system, computer, ignition module, and so on. Well, in preparation for this weekend's timing belt change, I threw on the new cap, rotor and ignition wires which have been sitting in the FCP/Groton box in my mud room for a few weeks. The old plug wires nearly disintegrated when I removed them... and guess what, the "miss" is a-missing! Gotta remind myself to always cover the basics first.
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