2012 Chevy Suburban 5.3L random misfire EASY fixed. 

I good mechanic should know hope to diagnose properly. Not just throw parts at the problem

when there are more serious codes thrown (check engine light comes on), it almost always disables stabilitrak automatically.

@@naterade32 fixed, bad valve cover/pcv valve, caused a few other issues, including goop'd up spark plugged, around $100 in parts all together.

@@2RiseAbove im getting misfire cylinder 6. Gonna try the valve cover first.

@@punkbutler88 did it work for you? How did you fix your rruck? Im also getting misfire cylinder 6, but no lifter tick, so i dont think is as serious as a lifter like other videos.

@@somedude0505 idk yet. Need time. Must have been a stored code, cause it hasnt came back.

It’s called a mapp sensor

What are the symptoms of damage to that sensor?

Cylinder 1 is a afm lifter. Possibly a collapsed lifter?? Just a heads up. Just Google failed afm lifter 5.3 and symptoms and diagnosis will be there. Good luck

@@ojflores3554 misfire was a bad plug.. and combination of an air leak as to why it was running rough. I fixed the issues.

@@StitchDGlitch I would've thought a specific plug or cylinder would've thrown that specific code? I'm playing with a p0300 and p0175 and p0174 right now.

@@StitchDGlitch if you don't mind me asking? What were your symptoms? Issues? I have new plugs. Am gonna replace the wires today. And possible the mass airflow. I get the random p0300 that comes and goes.

@@ojflores3554 check caytalitic converter on side misfire is there. I had random misfire code p0300 and on drivers side all 4 cylinders and hooked to my scanner and it was showing all firing misfiring bad it was the converter on that side and ended up blowing exhaust gasket to , replaced cat and manifold + gasket good to go

I changed it yesterday. And still have same problem.. I already replaced knock sensors, and intake manifold gasket, exhaust manifold gasket, spark plugs, and wires! And no check engine light!! I have a 2011...

JT’s Raceshop have you ever found the issue with misfire?

doctorhonda111 nope.. might be clogged cats, or fuel injectors:/

Or might be injectors idk she runs fine depending on the weather

@@in_the_building1 Did you fix the problem? My daughter has a 2011

Mine is... I was hoping it's not the exhaust valve because it does blow blue smoke at start up.. then goes away, I parked my truck and the next day it will not stay running unless my foot is on the gas , and it sounds so rough like a huge bag of cans rattle

did it work?

MAss airflow Sensor, unplug it with vehicle running, if it keeps running then its the Mass airflow Sensor. If it turns off once you unplug it it’s not the air flow sensor.

@@adriandelossantos7450 i change the MAP sensor, its still vibrating

@@adriandelossantos7450 i just did remove the MAS sensor, its it kinda choke the engine but it was running. do i need to clean it or replace it

@@adriandelossantos7450 ???

Did you find the problem i have the same thing

you have to do a throttle relearn anytime you do anything to the throttlebody, if you havent done that, try that

@@andrew0370 sorry for the late reply but it was the throttle body and the ecm computer to the engine you can get one programmed to your truck on eBay. They work together after I changed both it started working

Same thing for me. Shop says no pressure form that cylinder. They want to replace the engine. Hope they aren't robbing me.

I have same problem being.told new engine mis fire on 4

Check coil and wire and plugs

AFM stuck lifter

p0300 is random misfire

Similar issue, 2010 Tahoe. Was you able to fix it and if so what did you do? TIA

did it work sir>?

dan NEWYORK how do you tell what cylinder it is?

@@6.7riley cause u get a p0305 code c5 missfire

Same as mine, 2010 Chevy Silverado 5.3 , did you fixed?

Same ever find problem

@@6.7riley miss fire on 5