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Re: 1992 k1500 cooling system and missfire issues
I would suggest going back to the stock 195 t-stat. All you're doing is increasing the engine coolant temp, which to me is not good. The oscillating temp gauge is an indication of air in the cooling system. The sensor in the head is for the gauge. Could be you got either a bad one or the wrong one? I'd put the original back in.
I doubt that a new coil will make the motor run leaner.
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57 Chevy 210
65 Olds 442 Convertible (Another one sold)
75 GMC Vandura 3/4 Ton
1999 K2500 Old Body Style Suburban (Gone but not forgotten)
05 Dodge Ram 3500/5.9 Cummins
2012 Toyota FJ Cruiser
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