duece, the temp gauge indicates that is running about 1/3 high. No matter hot weather or cold, it never varies after it has been warmed up. Did your gauge get hotter than normal on hot days? I will try and locate the sensor and check it.
Jeruzalem, '94 to '96 Roadmasters and Impalas came with LT-1s. You are correct. If the engine is running hot, you do experience predetonation. The problem is that the car is running a normal (fairly low) temp. The outside temperatures seem to be causing the problem.
I have heard tell of the computer gizmos being a link to the problem, but I am hesitant to sink more unneeded cash into this thing. I have spent over $2500 so far, and I can't believe nobody stands behind their work anymore. Does retarding the timing cause missing? Does that type of missing turn to surging at higher rpms? I am so used to tuning by hand, that this thing does not allow. Thanks for the tips. I will be checking them out this weekend.