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Discussion Starter · #1 ·
Picture taken with truck warm in park.

Are these normal?
 

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Pretty normal. 3 is on the higher end of normal but say anything -4- +4 is ok
 

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Negative = Likely injector leaking past seat or needle or worn tip
Positive = Injector may be clogged/sticking OR you may be losing compression in that cylinder (ie mechanical issue)

with that said your still in good territory just the #3 is on the border. It is possible it could be compensating for another injector, try a cleaner?
 

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Discussion Starter · #4 ·
Any suggestions on a cleaner?
 

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Discussion Starter · #7 ·
Any certain amount of atf?
 

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Any certain amount of atf?

I would not call gm injector cleaner the last resort. I'd say it should be one of the first steps.

Do you run any additives when you fill up?

You are ALWAYS going to have some positive and some negative injectors. It's not that big of a deal until you get way out of spec. Seriously internal damage(like a hole in a piston) would be a +12 or +17.

FWIW I've installed brand new injectors and had balance rates in the 1.xx
 

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Discussion Starter · #9 ·
I've never ran any additives
 

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I would not call gm injector cleaner the last resort. I'd say it should be one of the first steps.

Do you run any additives when you fill up?

You are ALWAYS going to have some positive and some negative injectors. It's not that big of a deal until you get way out of spec. Seriously internal damage(like a hole in a piston) would be a +12 or +17.

FWIW I've installed brand new injectors and had balance rates in the 1.xx
was referring to the $$ aspect of the quick steps, not as the last step per say, but you right :thumb
 

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Any specific type or brand of ATF or is a cheap Napa or similar brand good to use?


Sent from AutoGuide.com Free App
 

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any brand will do
 

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I always run either power service or stanadyne 8oz and 10-12 oz of two stroke per tank. Will the ATF help clean up rates better?


Sent from AutoGuide.com Free App
 

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ATF can help clean the system and the inj tips. In my case, I had some off inj balance rates that indicated clogged inj and inj compensating for it and after a tank of ATF (LONG TRIP) my rates were improved and have been fine ever since. Just my experience.
 

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Any way to check balance rates OTHER than CTS? I have tried the Torque App and it won't work :rolleyes: I have a autocal now and the EFI Live software but have no idea where to go in that software to view balance rates (and other goodies). Anyone have a link or how to.?.?.
 

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You can do it on your autocal. You have to hook your computer up to the autocal open the efi software and load the balance rate pids over to you autocal. I'll try to find a link that explains it a little better.
 

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i had mine kinda look like that then i ran some power service in the tank for a few fill ups and they went down.
 

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Proper cleaning is with the GM injector cleaner for about $20 as pornojoe recommended.
DIY injector cleaning is recommended every 50K miles.

Running additive helps keep the injectors clean but isn't a replacement for the GM concentrated injector cleaner.
 
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