It looks like engine misfire cause by sparks loss from spark plugs wire even if they are new
Is spark plug gap is adjust at the right gap each of them
And change the rotor and cleans where it spark inside the distributor cap. Look for cracks inside the cap if so change it.
Little test . Take a bottle with spray nozzle, fill with water and 2 spoon of salt. Spray engine spark plug wires but be gentle with the amount of spray and looks for sparks while engine running. This is many misfire as you can see.
Solution put dieclectric grease into wire at the spark plug wire ends or you bought cheap wire set
Hope it helps
Distributor rotor inside check that if it's a v6 then check ignition cool that connects to distributor more need replacement.
SOURCE: I Have a 2002 blazer that starts but motor dies, surges when accelerating
If this engine is a VORTEC then you may have a problem with the internal fuel system. Under the top plenum there is a fuel reg and poppet valves that inject fuel into the cylinders. Sometimes the tubes that run fuel from the reg to the valves can leak and cause your problem. This cannot be found with pressure check because this occurrs after the reg. PS fuel mileage will go down. Let me know if this helps.Moe
SOURCE: chevy tahoe 2003 I have just put a new fuel
if you release throttle slowly does spead pick up poss plugg exhaust conv, plugged air cleaner, plugged fuel filter, most likely exhaust
SOURCE: 1997 Blazer no-start
sounds like youve really done your home work all that comes to mind now is try a cam posistion sensor this would keep your car from starting as well if that is good you can aslo try a crank sensor. you will get all of the readings that you are getting and these sensors can still be bad.
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