I have a 2000 Chevy Blazer 4x4 4.3 vortex put scan on it and only thing it says is multiple misfire now it won't start at all unless I pull off number 4 wire and then it will fire right up and will so

Asked by GuruLBRYD Apr 04, 2019 at 03:33 PM

Question type: Maintenance & Repair

I have a 2000 Chevy Blazer 4 by 4 4.3 vortec put
scan on it and says multiple misfires and right now
it will not start at all but if I take number 4 wire off
it'll fire right up but as soon as I put it back on it will
not start at all can someone explain to me why
that is

2 Answers

10,550

You talking about number 4 spark plug wire? Will it do the same thing if you pull one of the others? In the past, pre-computer years, One tech tip, if battery is a little down, plug a spark plug. It's not fighting compression on that cylinder and that cylinder uses no spark voltage. I tried it one time, it worked. Of course that was about 50 years ago. I can't say if that relates to your issue?

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