Car Information:
Chevy Silverado
Year: 1998
Engine Size: 350
Trans: Automatic

Issue / Question:
Will not start after sitting overnight, and very humid in am. Have replaced distributor cap, rotor. W/d 40 under cap has no effect, neither does starting fluid.
Runs well when running.
Don’t know if it matters but fuel gauge shimmies back and forth quickly.
Will often start fine after sitting to mid-day

Answer:
Gas gauge may be a giveaway! The sending unit and the electric fuel pump share the same ground at the connector by the fuel tank. Over time this ground becomes overheated due to excessive amps drawn by the fuel pump, intermittent fuel pump and fuel gauge fluctuations are common when this condition occurs and intermittent fuel pump operation can be expected.

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Magic Mechanic
1432 Lee Road OrlandoFL32804 USA 
 • (407) 298-7447