If they hooked up the battery backwards it's quite possible that something got smoked. You don't need to swap the camshaft back in, you need to have the tune adjusted to accept the camshaft as I mentioned above. As for the cam sensor code, if the sensor and wiring are both good, all that's left is the PCM or the reluctor lobe on the cam. You could try swapping in a different PCM and see what happens...used PCM's are relatively cheap and readily available.

Also, if the battery was hooked up backwards, it would behoove you to check every fuse in the truck, both under the hood and in the cab

 

thanks will do it


See what guys from black bear wrote to me, i`m not so well in English, so maybe after you read our chat with balbear you will advice what i will need to check ? because some of the worlds i did not understand

Me: I collected new missfire logs, but again showing missfires every new loq
connection it count in all different cylinders, please check let me know
what you think, it sims to be all cylinders have missfre on different time .
so what you think my next step to change camshaft?

BlackBear:

I wouldn't trust those numbers there unfortunately, the misfire tables are
probably too "loose". The actual misfire is occurring on cylinder 2,4,6 or
8 without question.

Me:
What you think i should do first to check ?
If you will be on my what you will do first ?
Another think when we rebiuld engine we made wrong connection with plus and minus, even alternator was damaged, we changed to new one, maybe i think ECU was damged that time

BlackBear:

Did you pull the spark plugs on that side to look at them?

The engine was not misfiring earlier, it is now. It is likely not an
electrical issue.

Me:
Yes we checked them look like new, because they new, and what you think how that can happen, because plugs are new, are you sure that missfire was not before, and truck goes very bad now, you think that happening because of missfire?

BlackBear:
Absolutely Positive it is misfiring now when it was not before. When you are in boost, there is fresh air/unburnt fuel in the exhaust periodically on bank 2. It was not there before. Perhaps the cam is the problem and a lobe is ground flat, I don't know.


what you think i need to check ? i did not understand what mean cam is the problem and lobe ground flat? maybe you can suggest me what i need to check? tomorrow i will check all wires again, and will take out all spark plug, what you think?

 

What Justin is saying with the misfire tables being too "loose" is basically what I said about how they have to be adjusted to compensate for the cam. He is stating that there are definite misfires on bank 2 (2,4,6,8) that need to be adressed, and maybe there is a camshaft problem. When he mentioned a lobe being ground flat, he is referring to exactly that...there is a possibility that one of the lobes got damaged for whatever reason and no longer has it's original shape. If you search around here, you will find pictures of cams with flattened lobes. Other possibilities are bent pushrod, broken valve spring, etc.

Is there any chance that the cam gear is a tooth off? (not sure if we addressed this already or not...)

 

If only one bank is missfiring, it could also be an electrical ground that was missed when the engine was re-installed. Make sure that the grounds behind the block are properly wired. the passenger side injectors might not be grounding out and therefore not properly firing, causing the missfires.

 

today finally we found the problem, 4 sparks wires was damaged, we did not see them under the fiberglass heat protection, previously i used "taylor`s" wires, so they do not last much. Less that 2000 miles

i`m looking now in NOLOGY HOTWIRES or just stock ones ? is the nology wires are really good ?

guys please advice what you are using, and what is the best choice

also please advice will it be better to buy new coils like MSD and if yes which one?

 

Stick with the stock coils as they are more than adequate, and much more reliable than the MSD coils. As for wires, I recommend either factory or MSD's. I've personally had great luck with both as have most of the guys around here. If fitment around headers is a problem, get the MSD's since they have bendable boots.