lb7 vibration misfire. injectors?

strongsperformance

2002 sierra cc dually
Jan 14, 2011
78
0
6
lake orion michigan
Well guys my truck has finally acted up on me.
Ok to start it off I turned off a side street and stood in it after the converter locked thru third gear. I let off pretty much coasted to my house. I get in the driveway and notice the truck is shaking like a cylinder misfire.
So today I hook up a tech 2 I am a newbie so I'm not sure how to use it but seemed easy. I looked at my balance rates and they are all within spec except number 5 it is at like 3.5 but I've seen 7.2 in gear.
Here's my thought I can turn off injectors individually but cyl. 5 makes a big difference but 1-8 do very little when injector is turned off.
I am not sure if the issue. It seems to of got worse now that I went out and ran it hard once.
I am not sure where start looking for answers.
I am going I didn't bend a rod. Idk
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strongsperformance

2002 sierra cc dually
Jan 14, 2011
78
0
6
lake orion michigan
What do you guys think about a possible balance pin shearing?
Just don't know where to start. Cash is tight to just throw injectors at it.
Update:
Went out pulled belt off and then reached up and removed balancer bolt with my fingers.
I'll be looking at balance pin in the morning.
 
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