So my check engine light come on and off sporadically... ive read the code everytim . Its has been 1 of two codes. P300 or p301. P301 had popped up a couple of time so i changed my plugs and wires. (All Plugs gapped at 40) check engine light had turned off pretty much right after doing so, so i thought i fixed the issue.. but after driving a bit sitting at a red light. I noticed (also could see in the rpm needle) i still had a slight misfire. The next day my check engine light popped back on. (P300) so now im at a random mulitiple misfire.. so i had a mechanic run the codes on a GOOD scanner that can watch the engine perform in real time.. it was showing no codes. UNTIL! He pushed the throttle and up pops p301 almost instantly. So that day i replaced my coil pack.. on cyclinder 1 only, temporarily with a cheap 35 dollar coil pack just to see if it fixed the issue. Check engine light turns off. 2 days later. Check engine turns back on.. 3 days later turns back off. As of right now the light is off.. but at an idle i can still feel a slight misfire..
Now that you have the full story.

My question is being that i have replaced the plugs, wires, and coil pack on cylinder 1 (being 95% of the time the code was p301) what are you thoughts on it being a sticky injector? Ive tried lucas injector cleaner/fuel treatment.. eh,, i wouldnt say i saw a change.. engine still slightly misfires.. no check engine light.

 

The thing I would do is replace the injector. You don't post about the engine.

 

"You dont post about the engine"
Im not sure what you mean? If i didnt metion what motor it i apoligize

specs: 2013 5.3L. 1500 LT, 4wd, ext cab

i think injector was going to be my next tackle.. just kinda wanted to throw it on a forum to see if there may have been any other ideas that i hadnt tried that i might have been missing before i tore intonthe motor! Thabks for reply i guess ill start buying the stuff to do the injectors.

While im in there.. any proformance tips you might suggest? Suggested injectors or anything i might consider upgrading as far as more horsepower or proformance?
i have a K&N Intake but ive been wanting tondkna little bit more, motor wise, kind of new to the modern LS world.. last project was a carborated 5.7 350 s10.