misfire issue.

byeezy_lb7

Member
Feb 19, 2020
32
0
6
Reno, NV
hey guys im trying to get my truck dialed in and truck threw a code for misfire cylinder 7.

the truck falls flat on its face off idle and the injectors clack and sputter and then finally decides to get going.

I used the cts2 monitor to check balance rates and i dont know if my monitor is not working properly but they all say 0.0

any ideas?

motor is fully built, triple turbos with 200 over injectors and dual 10mm cp3 pumps...

thanks.
 

KyleC4

Tech
Dec 30, 2016
312
3
18
Bay Area
This won’t help your condition but last time I had an lb7 constantly show 0.0 for balance rates the truck had a bad speed sensor on transfer case. When at a stop the tech 2 was showing 1mph being read by ECM.
 

Bdsankey

Vendor
Vendor/Sponsor
Feb 1, 2018
1,872
15
38
Neenah, Wisconsin
As said above, the truck will not report accurate balance rates if it senses throttle input or vehicle speed. It is also possible that you have a loose nut on an injector causing the issue.
 

juddski88

Freedom Diesel
Jul 1, 2008
4,343
0
36
Chesterfield, Mass.
May have lifted an injector, or cup if they aren't threaded... Assuming you don't have an aftermarket head that doesn't use cups. Could be a couple of things, but that's what I would check first. Do a compression test.
 

byeezy_lb7

Member
Feb 19, 2020
32
0
6
Reno, NV
so ive been able to get injector balance rates and I think ive got a bad injector

injector1: -1.3
injector2: -4.1
injector3: -6.7
injector4: 2.6
injector5: 4.0
injector6: -4.7
injector7: -15.0
injector8: -5.1
 

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