Coils 
Coils
TECH Enthusiast
Joined: Jun 2006
Posts: 594
Likes: 0
From: Enid, OK
why do you want to replace your coils? if you arnt having a missfire problem then use the money else where. The stock coils have been sufficent for even 1200 HP turbo motors (hot rod proved this with a 5.3 Vortec), if you want an OEM upgrade there is a write up on using the truck coils that have a heat sink build into the casting.
I'm thinking of replacing them because I just had the entire top end replaced and it still seems to miss a little. When I am sitting at idle I can feel a little miss or sputter if you will. I don't get any codes but they are the only thing i can think of.Everything outside of the pistons and block are new.
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Everything except the block and pistons, I made it an 04 Z06. It was doing the same thing before the change. Maybe I will switch the wires and see what happens. I have new plugs. I think I have some old wires some place I can switch them out one at a time and try to isolate the issue.
I'm using WeaponX.
OP:
"Upgrading" to the big truck coils with the heat sinks may show a little power-or may not-but it will improve driveability and response. However, it's not as easy as pulling the original ones and putting in the truck coils. Harnesses are different, brackets are different and a few things need to be moved a bit. All told it could be several hour's work.
Here's all the dirt on them:
https://ls1tech.com/forums/12985321-post1.html
I'm thinking of replacing them because I just had the entire top end replaced and it still seems to miss a little. When I am sitting at idle I can feel a little miss or sputter if you will. I don't get any codes but they are the only thing i can think of.Everything outside of the pistons and block are new.
What's the condition of your MAF? Do you still have the screen installed? Often times removing the screen causes more problems than it helps because the airflow hits the sensor at different angles. The stock MAF with screen is good to like 450HP.
Are you using an oiled air filter like the K&N? They've been known to adversely affect the MAF.