Short block purchase

[Tonyv__]

Here is the listing:

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The most important sentence is “cash talks”. I’d offer 1700 all day

 

[flynn78us]

Deleted post. Irrelevant question.

 

[flynn78us]

I think you guys have convinced me to look onward. Should I start a new advise post or put it in this one? Basically knowing I have a non deleted 11 LC9 with 184ish k miles and a repeated number 8 misfire that comes and goes after plug replacement what are my next steps. Buy a stock 6.0 for a little more power, get another 5.3 and rebuild it?

 

[blackelky]

No replacement for displacement

 

[j91z28d1]

I think you guys have convinced me to look onward. Should I start a new advise post or put it in this one? Basically knowing I have a non deleted 11 LC9 with 184ish k miles and a repeated number 8 misfire that comes and goes after plug replacement what are my next steps. Buy a stock 6.0 for a little more power, get another 5.3 and rebuild it?

I find the money spent doesn't hurt as much when you can consider it an upgrade. I vote 6.0.

as a in the mean time it could be interesting type thing, you could do the procedure dojetman did to his, to maybe unstick any rings, might help with #8 and add a 30$ catch can if you haven't to try and catch some of the oil going in while you look around. I do agree a 180k active afm on a vehicle you can't have go down would worry me too.

 

[Geotrash]

I think you guys have convinced me to look onward. Should I start a new advise post or put it in this one? Basically knowing I have a non deleted 11 LC9 with 184ish k miles and a repeated number 8 misfire that comes and goes after plug replacement what are my next steps. Buy a stock 6.0 for a little more power, get another 5.3 and rebuild it?

We have guys on here with over 400K on their original AFM-equipped 5.3's. I'd be more inclined to troubleshoot the one you have. Misfires can come from multiple causes, and #8 is not an AFM cylinder, so I'd look at the wiring to the coil and injectors next. The AFM cylinders are 1,4,6,7. Also, are the plugs you're using either OEM or NGK from a known source like Rock Auto or a local parts store? Amazon and eBay are rife with fakes.

Are there any knocking noises accompanying this misfire? Are there any other stored codes when it happens?

 

[flynn78us]

We have guys on here with over 400K on their original AFM-equipped 5.3's. I'd be more inclined to troubleshoot the one you have. Misfires can come from multiple causes, and #8 is not an AFM cylinder, so I'd look at the wiring to the coil and injectors next. The AFM cylinders are 1,4,6,7. Also, are the plugs you're using either OEM or NGK from a known source like Rock Auto or a local parts store? Amazon and eBay are rife with fakes.

Are there any knocking noises accompanying this misfire? Are there any other stored codes when it happens?

Ticking, now some bucking I put in Bosch platinum plugs in it. Ensured gap was 40. Cleared the code (0308) now it has random misfire. Bucking is new and seems like it may be transmission related but unsure. I bought this truck at just over 90k from an older couple that did all major maintenance in Florida during the winter months on Cape Cod when I was stationed there.

 

[Geotrash]

Ticking, now some bucking I put in Bosch platinum plugs in it. Ensured gap was 40. Cleared the code (0308) now it has random misfire. Bucking is new and seems like it may be transmission related but unsure. I bought this truck at just over 90k from an older couple that did all major maintenance in Florida during the winter months on Cape Cod when I was stationed there.

These engines are very sensitive to plugs. I can only tell you what I would do if it were mine. The factory plugs are iridium so I would start by replacing all eight plugs with these from Rock auto: https://www.rockauto.com/en/catalog/gmc,2012,yukon+xl+1500,5.3l+v8,1502532,ignition,spark+plug,7212

And wires: https://www.rockauto.com/en/catalog...5.3l+v8,1502532,ignition,spark+plug+wire,7224

 

[flynn78us]

I put those plug wires on last year in May. Same time I did the Bosch plugs. Went away until this week. I’ll throw the correct plugs in and see what that does.

 

[flynn78us]

I find the money spent doesn't hurt as much when you can consider it an upgrade. I vote 6.0.

as a in the mean time it could be interesting type thing, you could do the procedure dojetman did to his, to maybe unstick any rings, might help with #8 and add a 30$ catch can if you haven't to try and catch some of the oil going in while you look around. I do agree a 180k active afm on a vehicle you can't have go down would worry me too.

Can’t find the procedure @dojetman did? Is there a link?