random misfire - 1997 Blazer

noob525noob525 Member Posts: 2
edited March 2014 in Chevrolet
this is my first time doing this I put new spark plugs new wires cap and rotor and my engine light still comes on. and when I go up a hill I lose power and I am not kidding great gas mileage either there is a new fuel pump and a new spider injectors system I put in and I really do not know what I should do I am stumped thanks for helping me out


  • steverstever Guest Posts: 52,457

    Sometimes it helps to know what kind of Chevy and the year. If you can get to an auto parts store and have the codes pulled, posting them may help narrow the issue down too.

  • noob525noob525 Member Posts: 2
    It is a 97 blazer LS and the code is po300
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