TRNW-2: MISCELLANEOUS, 2018 Silverado 5.3 with a misfire

[keltecfan]

I have zero experience with the seller in the link you posted, but you may
want to heck that ebay sellers feedback. Lots of complaints on that AFM
delete package as being junk.

On Sun, Jun 8, 2025, 8:17 PM Tod Chretien via trnw2 <trnw2 at trnw.net> wrote:

> I definitely want to covert it to traditional camshaft and lifters,
> deleting AFM. I was looking at this package deal but I am not so sure about
> the quality of the parts.
>
> https://www.ebay.com/itm/405209555650?var=675310965679
>
> What do you folks think? That one or maybe this one...
>
>
> https://www.texas-speed.com/p-18933-l83l86lt1-dod-delete-kit-w-camshaft-for-2014-2018-gm-models.aspx
>
>
> On 6/8/2025 7:40 AM, Jim Bockus wrote:
>
> Pretty common for the AFM lifters to fail and ruining the camshaft. If you
> have to tear down the top end it's best to convert it to traditional
> camshaft and lifters and disable AFM. Not sure if you can do this legally
> in California but it's common in Alabama. You do have to remove the heads
> to access the lifters.
>
> I watched a video the other day about what a PITA it is to remove the oil
> pump which runs off the front of the crankshaft, the problem is accessing
> the oil pump pickup bolt, you're supposed to remove the oil pan to get to
> it but this guy modified a wrench to get to it. Then the next problem is
> reinstalling the bolt, I guess there's actually 2 bolt holes in the pump
> but it only uses one, he ground off the spot weld on the flange so he could
> rotate it and used the bolt hole in the pump that is accessible. I'm sure
> you can find plenty of information on YouTube.
>
> On Jun 7, 2025 8:52 PM, Tod Chretien via trnw2 <trnw2 at trnw.net>
> <trnw2 at trnw.net> wrote:
>
>
> *Post ID:* 21395
> <https://www.trnw.net/trnw/forum_thread.php?post_id=21395&forum=2>
> *Date:* Sat Jun 7 18:52:40 PDT 2025
> *Subject:* MISCELLANEOUS, 2018 Silverado 5.3 with a misfire
> This isn’t a transmission problem so please forgive me for that. I just
> bought a 2018 Silverado with 110K. It started making a light tapping noise
> on moderate to heavy acceleration. About 3 days later I had to punch it to
> beat some oncoming traffic and it started misfiring severely. The #1
> cylinder is counting misfires so I pulled the spark plug and they
> definitely haven’t been replaced yet. Hoping for the best I replaced the
> spark plug but it’s still counting up on #1. I swapped the coil with #3 but
> it didn’t change. I hear the lifters on these AFM engines have issues. Does
> anyone know what goes wrong with the lifters and how to diagnose it? Would
> it have no compression? Sorry for the dumb question but book time is over
> 20 hours and I don’t want to do the wrong thing. Any help or insight would
> be greatly appreciated.
>
> Tod Chretien
> Ralph's Transmission
> Modesto, California USA
> tod at trnw.net
>
>
>
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>
>
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>
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>
>
>
> --
> Best Regards,
> Tod Chretien
> TRNW Inc.http://www.trnw.net
>
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