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Posted

I have the dreaded p0300 code on my truck. I have already tried replacing the following- Crank sensor ( and relearned), distributor, plugs, wires, egr, map sensor, spider injector. Checked fuel pressure and I'm within normal range. My next though is try and replace my pcm.. anyone else have an idea or something to test? 

Posted

On the 4.3, 9 times out of 10 it's leaking intake manifold gaskets.

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