Re: Help before I go crazy. 99 suburban 5.7 vortec wont start.
If and it's a big if. You have fuel, spark and compression. Than the spark is happening at the wrong time. Simple as that.
So the question is how do you know you have compression? Cause you heard it run when you yanked out the donor vehicle?
Incidentally a SBC will not run if it looses spark to 3 or more plugs. Did you check all 8?
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