The parallel resistance rule. ( I think?) I am asking you guys I had one plug come in at 67 kohms

so my guess which is usually always wrong is the equivalent R seen by the glow plug heater instead of being (R1xR2xR3xR4xR5)/(R1+R2+R3+R4+R5) where all the R's are say 1 ohm , then R eq = should be 1/5ohm.
That assuming the glow plug heater sees them in parallel ....
Now that I have one bad 67 kohms plug sucking up all the amps from the glow plug circuit. The 1 ohm plugs don't get much...because my horrible math shows R eq to be closer to 1 ohm vice 1/5 ohm so with the higher resistance the 12 V circuit heats them all with 1/5 the normal amount of amps? Is this right.

My car wouldnt even start at 35 degrees without a major scenario. Now it starts at 15 degrees like a brand new gasser! Thats because it can't read Shop Forum and it thinks everything is graet. ( I replaced them all anyway)

Does this mean after everyone debunks me temoorow, my car will stop running so well on very very cold dayz?