HI there
The code points to a problem with the cam or crank position sensor. The starting more indicates a problem with the fuel pump. It will usually start hard if it's a cam or crank sensor issue, but spraying starting fluid into the throttle would not normally change that.
P1345 CHEVROLET - Crankshaft Position-Camshaft Position Correlation Read more: https://www.autocodes.com/p1345_chevrolet.html
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