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93 2500 hard starting

Discussion in 'Chevy Trucks' started by Buster F, Jan 1, 2007.

  1. Buster F

    Buster F Senior Member
    Messages: 208

    Hey guys, i have a 93 2500 4x4 w/a 5.7 tbi and auto trans. The truck is real hard to start when it's cold - requires lots of cranking(fires right up when its above 50 or has already been running). Is there a cold start injector/sensor that may be malfuctioning? Being a TBI there is no choke, but the symptoms suggest a lean mixture during cold starts. Any suggestions? Thanks, Roy
  2. Sydenstricker Landscaping

    Sydenstricker Landscaping PlowSite Veteran
    Messages: 3,882

    It may just need some good injector cleaner run through it with a tank of gas. Or depending on how cold it is, maybe invest in an engine heater you can plug in
  3. IACV could be dead. Maybe its stuck open causing too much air flow. It should cycle back and forth when at idle to maintain apporpriate airflow. One way to check it is: When idling, turn on airconditioning...IACVshould open to keep truck from stalling during the sudden increase in load on the engine from compressor starting.

    Could be coolant temperature sensor too...giving false reading when cold.