Misfiring, runs like crap in morning

exp500

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Do a Live Data scan on a road test, should show you whats goin on. If thats not possible change cap/rotor and coil wire.
P0300 likely. nice to see graphing of codes or fuel trims, other sensors that live scan picks up when missing.
 

YukonGTmaster

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This may seem like a no brainer, but how does your air filter look? I’ve seen those things soaked in red K&N juice.
 
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