1993 Cheyenne 1500 v6 5 speed manual
Maybe ignition problem. pull dist. cap and check for signs of moisture. be a green dust if this is the case, replace cap. let me know. if appears ok, let me know and ill help more.
SOURCE: distributor cap firing order 1993 chevy cheyenne truck v6
Firing order is 1-6-5-4-3-2 cyls. # 1-3-5 on drivers side front to back and cyls. # 2-4-6 passenger side front to back.
SOURCE: Runs rough at idle and low rpm. misfires. gets better @ high rpm
sounds to me you have a emissions problem check your EGR valve and MAP senser
SOURCE: My 1993 chevy 1500 Silverado truck suddenly quits
1993 c1500 just stopped running in middle of street
SOURCE: idel problem on 5.7 1995 silverado
You engine is TBI, It uses a MAP sensor check the vacuum line for crack and make sure yo have a good seal, The distributor also check and make sure the pick up does not have corrosion which causes the relutor to stick. As for the EGR it would cause a misfire, and yes the do fail. I am sticking with the IAC as a problem its a stepper motor and has a high failure rate, chack also the ECT (engine coolant temp sensor) for corrosion that gives false reading.
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