Misfiring, runs like crap in morning

[Cpurp31]

Add a can or two of berryman. See if it cleans up the injectors. You already have the updated spider.

Put some Berryman in. Ran good for a bit then right back to the same thing

 

[exp500]

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]

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.

 

[Swagfu]

Mine was running so bad that it wouldn't start sometimes. I would go out in the morning and it would crank like crazy and not start. Go out about 1 and it would fire right up. Changed the crank sensor and cam sensor and now it starts right up every time. Was driving me crazy. Maybe something to condiser.

 

[exp500]

Fuel pressure test with long hose.! Key on eng off #/time till it drops 10#. Driving#. And When missing#. Book is 62-66#