I had a mystery misfire on cylinder #3 5.3l 2016 for sometime that Gm couldn’t figure out. It turned out after changing plugs and wires and swapping coils and even an injector, that it was the ignition coil connector. The wires had came lose in the plug. Bought a new connector and heat shrunk it on and it works perfect! Cost about 135$ Canadian from gm! Food for thought if anyone else is having a mystery issue.
@AnthonyJ3502 жыл бұрын
Thanks for sharing your experience!
@margaretlankford3068 Жыл бұрын
Nascar race today
@nicholasebabyak3425 Жыл бұрын
Was it a P0300 code? Or was it a specific cylinder code?
@BoOmBaMan3 жыл бұрын
Great way of deduction. 👍 Process of eliminating potential variables when you don't have a way of knowing what's faulty. Especially for those who don't have a scanner on hand. Reliable methods like this are invaluable.
@AnthonyJ3503 жыл бұрын
Thanks Thizz!
@jbowden718 Жыл бұрын
Great video. Just ran into this problem. Solved my P0305 misfire. Thank you so much. Went ahead and also replaced the fuel injectors because of the poor idling. 2014 Silverado with 69K miles, they were total trash.
@AnthonyJ350 Жыл бұрын
Nice! Is your truck the newer one with direct injection?
@jbowden718 Жыл бұрын
@@AnthonyJ350 yes, it’s got the GDI engine. Unfortunately the intake ports looked terrible. I couldn’t blast it with crushed walnuts like I’ve seen done so I opted for a Lucas GDI cleaner. At $20 a bottle I hope it helps. They are not building these trucks to last past 150k.
@stealthg35infiniti943 жыл бұрын
Good job.! Audio, Lights, Aftermarket Equipment and now Diagnostic Troubleshooting Repairs....
@AnthonyJ3503 жыл бұрын
You never know what we're going to work on next lol
@BrandogSalas-bi3nl10 ай бұрын
I second that hold ratchet by the top for precision fastening
@AnthonyJ3509 ай бұрын
Thanks for watching!
@garlandtxcuh9497 Жыл бұрын
I move the coil in say misfire cylinder 5 in it say random misfires what can I be? I change the spark plug in the cable wire and the coil and still have the same problem
@AnthonyJ350 Жыл бұрын
Curious, watch this video and see if this is also your problem kzbin.info/www/bejne/iJvcZaanr997nas
@G-shock-th7th Жыл бұрын
Where can I take my car is 2018 Tahoe has rondom misfire
@AnthonyJ350 Жыл бұрын
Broad question. What area do you live in?
@marioncobretti78702 жыл бұрын
My truck just started misfiring in the cold, goes away when its got. My bets the intake valves caked in oil, because theres no fuel to wash the vales in direct injection engines. Huge problem in VW anyways.
@AnthonyJ3502 жыл бұрын
Definitely want an oil catch can to slow it down. Tracy Lewis Performance makes a great one for these trucks rxcatchcans.com/ols/categories/catch-cans
@mishutkin1012 ай бұрын
Have po300 and po50d on 16 silverado 5.3 do i need new fuel injectors or sparkplugs?
@AnthonyJ3502 ай бұрын
Not sure
@TKess288 ай бұрын
I’m getting p0300 and a p0420 even after changing the cats, plugs, wires, o2s and coils but when I view the freeze frame it cycles between 300 & 303 so I’m going to change out the #3 coil again and see what happens if that doesn’t help do you have any other advice?
@AnthonyJ3508 ай бұрын
I would go over all the factory ground, especially the ones from motor to chassis and body.
@TKess288 ай бұрын
@@AnthonyJ350 will do thanks man!
@trevernash12604 ай бұрын
Any chance you can share what values (misfire counts) are shown on your scan tool for all cylinders for the L83 5.3. I have some low count misfires that won’t throw a code just yet is there a normal amount of misfires for cold start and or when the engine is warm idling?
@AnthonyJ3504 ай бұрын
Vehicle is long gone and back in service.
@trevernash12604 ай бұрын
Obviously….just trying to see if you know common readings for misfire counts on these motors…like are they all supposed to read zero when warm or do they have a few on cold start…that kind of info
@AnthonyJ3504 ай бұрын
@@trevernash1260 Sorry, I don't know that info.
@nathanielcorral1992 Жыл бұрын
Me and my grandfather are very confused we have p0300 cylinder 1 misfire we tried moving the coil packs and the spark plugs and wires but it still stays we also replaced the purge valve Cadillac converters pcv valve when starting the truck it pings and the motor rattles just bought the truck a month ago any information would be greatly appreciated
@nathanielcorral1992 Жыл бұрын
When starting the truck it also tells me to service stabilatrack abs trailer brakes we were thinking pcm
@nathanielcorral1992 Жыл бұрын
*ecm*
@AnthonyJ350 Жыл бұрын
Look into this first. You might have a water leak in the roof kzbin.info/www/bejne/iJvcZaanr997nas
@davidlockwood254 Жыл бұрын
2016 Silverado p0301 changed coil pack pulled spark plug oil on threads replaced spark plug and still same code missing when acceleration jerking flashing check engine light
@AnthonyJ350 Жыл бұрын
Look into this, you might have a water leak and potentially damaged electronics if changing those parts didn't help kzbin.info/www/bejne/iJvcZaanr997nas
@jc06gsxr60011 ай бұрын
Lol they did that to eliminate the possibility of an injector ot bad lifter. Better to swap and test than throw parts at it
@luismejia544811 ай бұрын
@davidlockwood254 Did you ever find out what the issue was? My sierra is giving me the same code. I pulled the spark plug and also had oil. Replaced them all and swapped ignition coils but still giving me p0301 misfire. I’m looking into the fuel injector now.
@davidlockwood25411 ай бұрын
@@luismejia5448 mine was a valve spring and just ended up doing a dod/afm delete stage2 cam
@davidlockwood25411 ай бұрын
@@AnthonyJ350 valve spring
@Yesyall777 Жыл бұрын
How much for repairs ?
@AnthonyJ350 Жыл бұрын
I don't remember. I might have been 3 to 4 hours billable time due to diagnosing and testing.
@lookingood4811 ай бұрын
So my problem is I get the p0300 code and no follow up code to tell me the cylinder. You had the code and instead of replacing you moved it for the person to come back. Smh
@AnthonyJ35010 ай бұрын
I did put in a new ignition coil pack, what are you talking about. We just moved it around to verify the problem....
@marcorivera56942 жыл бұрын
Hey man I did the coil swap and it went from P0307 to p0300, do you think it’s the coil
@AnthonyJ3502 жыл бұрын
Most likely if the problem moved to the position you moved the bad one
@TDinosor472 жыл бұрын
2015 Tahoe police package. Misfire #7 I changed #7 came back again Send it to the shop they saying we need to dig inside the engine to find out the problem.
@AnthonyJ3502 жыл бұрын
Did you try moving it to another cylinder. It might be the wiring or pins in the connector.
@AnthonyJ3502 жыл бұрын
What are they checking in the engine? Do they want to pull an injector out?
@TDinosor472 жыл бұрын
That’s what confusing me for a simple misfire and already cha
@AnthonyJ3502 жыл бұрын
@@TDinosor47 I would check for a vacuum leak as well kzbin.info/www/bejne/r3_IiJ9omN-cn5I
@mikestillwell55662 жыл бұрын
P0300 is random misfire though... it doesn't really help nail it down
@cmr222 ай бұрын
I have a 2015 chevy tahoe, gave me a p0308 and replaced coil and sparkplug. Now i get p0300. Any ideas
@AnthonyJ3502 ай бұрын
You replaced all the spark plugs and how many coils?
@cmr222 ай бұрын
@@AnthonyJ350 i had replaced only the coded coil and spark plug (misfire cylinder 8)… so my dumb ass purchased all the coils but was to lazy to change them… so decided to change them all and new spark plugs and problem went away
@AnthonyJ3502 ай бұрын
@@cmr22 Glad you figured it out
@TheChrisgralnicАй бұрын
I just did a cam and lifters on a 14 5.3 . It runs good now. The cylinder that was misfiring is now fine. But now i have a P0300 and a miss under load on #6. Could be coincidence and need an injector now. I have 180 psi on cyl 6. At idle i get no misfire count. But in drive power braking #6 misfire count goes up steadily. Any advice ?
@AnthonyJ350Ай бұрын
Did you try moving the coil pack, just incase?
@TheChrisgralnicАй бұрын
@@AnthonyJ350 Turned out to be a clogged GDI Injector
@AnthonyJ350Ай бұрын
@@TheChrisgralnic Ahhh ok. Glad you figure it out!
@autoperformance5033 жыл бұрын
What cause aggressive and Loud downshifts in some cars?
@AnthonyJ3503 жыл бұрын
In an automatic?
@autoperformance5033 жыл бұрын
@@AnthonyJ350 yes
@mlaautomotivellc9327 Жыл бұрын
P0300 Cylinder #1?
@AnthonyJ3508 ай бұрын
It's a misfire code. Need to verify which cylinder.
@BALJITSINGH-ez4nk Жыл бұрын
How did you fix U0401?
@AnthonyJ350 Жыл бұрын
Reseal the Onstar antenna that lets water in causing issues kzbin.info/www/bejne/iJvcZaanr997nas
@BALJITSINGH-ez4nk Жыл бұрын
@@AnthonyJ350 can code U0401 cause misfire? I am having P0301 and U0401. I already sealed that antenna.
@AnthonyJ350 Жыл бұрын
@@BALJITSINGH-ez4nk Probably can because it's a data communication error and the ignition and fuel timing is computer controlled.
@BALJITSINGH-ez4nk Жыл бұрын
@@AnthonyJ350 thanks, i suspect U0401 is causing misfire i swap coil and put new plug and wire, put new ABS sensor on 4 wheels, put new o2 sensor on s1b1 and still getting misfire and U code. i will check wiring.
@AnthonyJ350 Жыл бұрын
@@BALJITSINGH-ez4nk I would also check for water damage
@llcool3004 Жыл бұрын
Why just swapped out coil in first place
@AnthonyJ350 Жыл бұрын
What if it's not actually the problem?
@vigusfinlay86492 жыл бұрын
Where is the P0300?
@AnthonyJ3502 жыл бұрын
That's the engine code
@vigusfinlay86492 жыл бұрын
@@AnthonyJ350 yeah.. But you did the cyl 1 sapped to cyl 5. Maybe that means P0301 and P0305. What's your basis that the P0300 code refers to Cyl 1 or Cyl 5?
@animatedmammals2 жыл бұрын
My 2017 Silverado is throwing p0300 but no specific cylinder code. I think that is what he meant.
@davidbenitez6469 Жыл бұрын
@Vigus Finlay , P0300 means multiple misfires maybe from multiple cylinder. Could be wrong.