Grounding coil for compression test

[Kubaat3lover]

Hello folks
Simple question, I’ve read in service bulletin that for compression test I have to remove middle plug from coil and ground it to the block, right??
But doesn’t it just short out the coil?
Or maybe remove positive terminal from coil

 

[Rick Stephens]

Even though it is not the recommended way, I just pull the coil to cap wire. All gonna die one day anyway.

 

[Kubaat3lover]

Yes I mean the wire from coil to the cap

 

[alldodge]

^^ Many times did the same thing (Ricks post)
It says to ground it so there is no spark that might cause a fire. So the coil wire can be grounded

OR

With a T Bolt just disconnect one or both of the bullet connectors coming from the distributor

OR as you say disconnect the + side

 

[Kubaat3lover]

It’s TB V ignition , but just grounding the wire from coil to cap won’t shorten it out?..

so to be sure. Ground this wire ??

 

[Scott06]

It’s TB V ignition , but just grounding the wire from coil to cap won’t shorten it out?..

so to be sure. Ground this wire ??

Yes take it off distributor and put it on a grounding point on block or intake. it allows a path to ground for the spark , just like in your spark plugs when they fire...

Or as AD pointed out you can disconnect the two bullet connections to distributor sensor and no spark will be made.

 

[bruceb58]

By just leaving it open, that's a sure way to blow out the coil. When it is open, that high voltage has to go somewhere so it blows through the insulation inside the coil trying to find a ground. By grounding it, you don't have that issue.