usually when a car runs on fewer cylinders than what it is supposed to it is a problem with either the spark plugs, the wires or the distributor cap or whatever it is called in the newer cars. ** I had the same problem , have the spark plugs changed, or just get a tune up . Car most likely needs it.
A coil that is not functioning.
Do NOT use a helicoil. A good repair shop or machine shop will have the tools to install an insert which becomes a permanent repair. A helicoil will come out when the spark plug is removed and cause further damage to the cylinder head.
No your cylinders should not freeze up, you may have bent the valves in the cylinder head tho
On one or all cylinders? a single cylinder compression loss may be a stuck or bent valve, or even bad piston rings. Engine wide would have to be some kind of massive valve train failure.
bad coil
A bad cylinder head gasket.
I have to think it is the wire; it is probably shorting out to the engine. Even if the wire looks good and tests good don't trust it.
Bad plugs? Bad plug wires? Bad coils? Bad head gasket?
Blown Head Gasket or Bad Cylinder Head
If i new the year of engine it would help on the answer. So check these few things first. plugs, cap, wires, Injector, Low are no compression on a cylinder. EGR valve whitch would lean out 2 cylinders and cause a no idle or real rough idle. A vaccume leak.
Either one or more wheel cylinders are corroded and locked up or the master cylinder is locked up. First thing to do is check the master cylinder. Then check each wheel cylinder. Replace or rebuild any that are corroded or locked up. Replace all the brake fluid in the system. On a vehicle this old, I am sure the brake fluid is contaminated. Also a leaking wheel cylinder will cause a brake to lock up. One other possibility is a collapsed brake hose. Inspect them carefully.
Without seeing it, I would say that the wheel cylinders may have rust/corrision in them preventing them from moving in their bores.That would explain why the pedal does not go to the floor when trying to bleed them. Crack the bleeders open and see of fluid comes out either one. IF it does, replace the wheel cylinders. IF not, there may be a restriction further up the line, collapsed brake hoses, master cylinder or a (proportioning?) valve problem.