Need help ASAP! P300

[98k1500]

Hey guys, I have a 98 k1500 with the 5.7 and I need help bad. My truck keeps throwing a p300 random misfire code and it's running like crap. It just falls on its face when I give it throttle. I've put a new cap and rotor on and checked all the wires. Plugs are pretty new also. I cleaned the egr also and checked my fuel pressure which is around 55 at idle and 62 revving. Any ideas? I need this thing running good.
Thanks in advance


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[TruckinAin4Sissies]

Pull the distributor (marking it's location first) and check the drive gear. If it's knife-edged or has noticeable wear then it'll need replaced.

GM sells an upgraded drive gear.




-Truckin'-

 

[98k1500]

Pull the distributor (marking it's location first) and check the drive gear. If it's knife-edged or has noticeable wear then it'll need replaced.

GM sells an upgraded drive gear.




-Truckin'-

I just put a new dizzy in like 2 months ago but I'll look, thanks


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[TruckinAin4Sissies]

I just put a new dizzy in like 2 months ago but I'll look, thanks


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Check the cap/rotor. If it's a plastic bodied distributor (like OEM) check the body for cracks at the 2 screw locations.

Be sure the 2 vent hoes are clear (distributor body, below rotor).




-Truckin'-

 

[98k1500]

It's not plastic bodied but I looked in the dark last night and it looks like the coil wire is arcing out on the tranny dipstick so I hope that fixes it


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[TruckinAin4Sissies]

:thumbup:




-Truckin'-

 

[98k1500]

Welp wasn't wires.. What are these trucks supposed to have for fuel pressure? 55-62 right?


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[JollyGreen]

Pretty sure it's 60.

 

[98k1500]

Well I'm at 55 at idle and 62 when revving


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[98k1500]

I checked all my plugs and sea foamed it. driver side plugs had some oil. Any thoughts?


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