Fuel injector?

[zac hale]

Hey guys, new to the whole forum thing so bear with me. I just purchased a 2015 LT silverado with 5.3 ecotech about 2 months ago. The other night the check engine light came on and started to miss, then the traction control light came on. I only have a cheap scanner that tells me the number, which was misfire on cylinder 7. The next morning, I swapped coil, plug, and wire to cylinder 1 and drove down street and nothing changed, still misfire on cylinder 7. I should note that the truck sounds great when it's first started until it comes off high idle and then the miss. Does this sound like an injector to you guys? 

[CamGTP]

It's either the injector or the AFM lifter has failed. Both are common but the lifter issue is far more common.

[zac hale]

Thanks for the reply, sure would be disappointing to see lifter problem at 68k miles. I suppose I'll try a compression test tomorrow and see what's up. 

[CamGTP]

My parents lost a lifter at 50,000 miles on their 2016, it sucks at such low mileage.

[richard wysong]

With a stethoscope you should be able to hear if the injector is working, a long screwdriver held ro your ear and placed on the part works as well

[pokismoki]

 thin oil and high engine temps cause metal on metal failure in these motors, I believe you might as well use water as a lubricant instead of DEXOS2 0w-20

Edited August 27, 2022 by pokismoki