Best coils for best price?

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Feb 13, 2012 | 04:11 PM

#11

TXsilverado

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Joined: Jan 2005

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From: Humble Texas

why do you think that you need new coils?

Feb 13, 2012 | 08:06 PM

#12

z71vortec

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Staging Lane

Joined: Jan 2011

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From: depew, ny

I have a bit of a miss at while at idle... plugs and wires have only got about 10k on them u guys think i should yank the plugs and check the gap?

Feb 14, 2012 | 01:46 PM

#13

z71vortec

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From: depew, ny

Any ideas guys?

Feb 14, 2012 | 01:51 PM

#14

iamkeniff

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From: Gonzales, la

pull the plugs and check them, its easier than just changing coils. get a tech 2 or someone with efi/hptuner to scan the truck to try and find where the miss is at.

Feb 14, 2012 | 08:11 PM

#15

z71vortec

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Staging Lane

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From: depew, ny

thanks alot!

Feb 15, 2012 | 07:35 PM

#16

Suburbazine

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Joined: Feb 2009

Posts: 1,635

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From: Baton Rouge, LA

Quote:

Originally Posted by Mangled03gmc

The round ones have a heat sink in them( some say they are an exclusive 6.0 coil) but I have seen a few diff occasions where they have been factory on 5.3's. Your going to pay more the the round ones. IMO a square set will work just fine.

The VIN Z engines generally got the round ones stock along with the bigger injectors. VIN T got square ones.

The round ones are considered the nicer ones because they are more stable electrically than the square ones in higher output situations.