1989 Chevrolet S-10 Blazer Hard Cold Start

Suggested Repair

Check and replace the spark plugs and plug wires if worn, then verify fuel pressure and inspect the fuel injectors for clogging.

Conversation Summary

The owner of a 1989 Chevrolet S-10 Blazer 4x4 with a 4.3 engine reported a sudden hard cold start. The rotor was black with carbon, and the engine would start only if the throttle was not touched, then would not accept throttle until warm. The cap, rotor, distributor module, spark module, computer, and coolant temperature sensor had been replaced, and the fuel tank and pump were recently replaced. Experts advised checking the spark plugs and wires before more fuel-system work, and also checking fuel pressure and whether the injectors are clogged.