I checked all the gauges while I had them out and they all checked good. The ground on my gas tank may not be good but I'll check it in the morning. The 2 gauges didn't start pegging out untill I started the motor. Would a new motor maybe run more than 80 lbs. of oil pressure? The gauge just goes to 80. If the temp. sending unit is bad would it short out? I'll just have to start checking everything. If you think of any thing let me know. Thanks Ronnie