I have a 94 Miata; I have hade some problems with it. It has 125K on it the compression is quite good at 150, 150, 149, 149 respectively. I changed the timing belt 300 miles ago. The one on it did not look bad but was somewhat stretches. My main concern is when I set the engine to TDC the exhaust cam gear marking was off by 3 teeth counterclockwise. The engine sounded OK except for a knocking noise from the alternator. I set the timing marks as per the manual. The engine started right off and I was able to set the timing to 10 deg. BTDC. I ran it for 100 miles then moved the timing to 14 deg. BTDC. The engine ran good for the first 50 miles, but developed a miss off idle. I just checked the timing and it is right on 14 deg, BTDC.
Second I changed the alternator to one I had that has only 2000 miles on it. And new drive belts. After tightening the belts the knock was back. I loosened the drive belt on the alternator/ water pump, and the knock went away. Is this common? Does anyone have something I can try? Bruce Andrews
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