Mooseman
Moderator
Misfire on Cylinder 7
- Thread starter Inferno333
- Start date
gmcman
Member
- Dec 12, 2011
- 4,656
Ha....absolutey not....You dare doubt the Moose?!?
Straight out of GM SI:
But.......based on the document, the only thing definitive I see is that 105 should be the lowest and the lowest should be 70% of the highest.. It doesn't specifically state the normal range or what the highest should be.
I honestly don't know what the specs are, my gut says 135 is low.
gmcman
Member
- Dec 12, 2011
- 4,656
A leak down test would be good to try also.
If you have a scan tool and can monitor rpm more precisely, you can perform a load bank test. I like to take a piece of wood or something and use the drivers seat to raise the rpms to about 1500 to 2k. Then disable one cyl at a time noting the rpm drop....easier and safer to do by removing the 12v from the coil instead of pulling the wire.
This way you can see which cylinders pull their own weight and ones that are more parasitic.
If you have a scan tool and can monitor rpm more precisely, you can perform a load bank test. I like to take a piece of wood or something and use the drivers seat to raise the rpms to about 1500 to 2k. Then disable one cyl at a time noting the rpm drop....easier and safer to do by removing the 12v from the coil instead of pulling the wire.
This way you can see which cylinders pull their own weight and ones that are more parasitic.
