[pan957]

Check for leaking intake manifold or seals also see if the woven ground cable is tight under the inner primary cover. Also double check your timing with a timing light and inspect your 32400-80B sensor plate for condition. The "B" in the suffix of 32400-80B stands for the third upgrade of the part. They like to melt over time. If you have a 32400-80 or 32400-80A you probably should change it. As a quick check , dismount your ignition module and turn it over and see if you can see bubbles forming in the plastic matrix. Early Evo modules had a vibration induced internal components failure. Later modules were modified with springs or buffers to prevent internal component vibration failures. Sounds like your problem is heat related.