Broken Ring Lands - is it a sure thing they cause low compression?

[MaximumMini]

Google searches reveal conflicting opinions.

In a scenario where inspection reveals no other cause for loss of compression, would (or do) broken ring lands necessarily cause low compression?

Now this might depend on the engine, the severity of the crack etc. For example, has the ring land separated from the piston body and if so, how much?
1/4 the circumference? 1/2? All the way around? Are chunks missing?

Also might depend on which ring lands. Is the area above the top ring considered a ring land? That seems it would be Crown damage.
If we assume yes, then a compromise there is almost assured to cause a compression problem.
But what about the ring land directly below the top ring?
What about the ring land below the 2nd ring?

What do the experts say?

 

[PontiacHO]

The ring has lost its support therefore allowing the ring to move-twist in a way that does cause blow. The cause of the broken ring land is the real issue…

 

[MaximumMini]

The ring has lost its support therefore allowing the ring to move-twist in a way that does cause blow. The cause of the broken ring land is the real issue…

I've been researching this. Speaking of blow, an injector that is not putting out properly seems to be a common problem. I might replace this injector while im at it.

 

[PontiacHO]

I've been researching this. Speaking of blow, an injector that is not putting out properly seems to be a common problem. I might replace this injector while im at it.

Blow by is what I meant. Sorry.

 

[PontiacHO]

Spark knock is a typical cause.

 

[DuckRyder]

Needs to be dealt with if the ring land is broken.

 

[MaximumMini]

Spark knock is a typical cause.

That's what I read too.
This engine has a knock sensor which should retard timing whenever it senses knock so maybe it's not working? No codes on it.
Many people buy the cheapest gasoline they can buy.
My opinion is this is being penny wise and pound foolish. Eventually you will pay far more the savings in engine repair costs.
I always try to avoid the stations with the cheapest gas prices.

 

[brages]

I always try to avoid the stations with the cheapest gas prices.

Not me, I always buy the cheapest "gas" I can find

 

[chexxers]

sounds like LSPI from other descriptions, good luck $$$