CT 525, #1 cylinder shoots 200-250 degrees colder than all others with heat gun and motor pops and cracks between 2500-3000 rpm,,have changed msd box, wiring harness, coil pack, plug, plug wire, checked compression (150 lbs), took valve cover off and both valves are moving, valve springs look ok,,changed crank and cam sensors,,,checked header for crack,, any ideas?? Checked #1 plug and it is firing
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