Spark plug blew out now car wont start

Your local part store should carry a thread repair kit as it it quite common. Make sure you protect from getting metal shavings inside of the cylinder.

crank sensor?

remove spark plug cable/ignition coil to that cylinder, get a spark plug socket and wrench, remove old spark plug, install new spark plug.

misfire in all 4 cyclinders hmmm...... compression tester check compression 125psi is good 100 and lower is bad (head gasket they go bad) if that is good, do fuel filter,, or charge system is bad, or bad ground or bad coil

Pull the top cover off,you will have a COP (coil on plug system) remove COP and there the sparkplugs.

You can buy what is called a heli coil. That fills the spot where the plug was. Also, I would do a compression check on that cylinder.

Duh, check the coil.

crossfiring/ crossed wiring - check the firing order to ensure proper firing sequence..

The causes for spark plugs leaving the cylinder head are as follows:
1. The threads in the cylinder head were compromised, as in cross-threading.
2. The spark plug, when replaced, was not tightened down properly (like only 2-3 threads in)
3. A combination of the above.

Whe the plugs are fully seated in the cyl heads, and are at the proper torque, it would be extremely RARE for the plug to be jettisoned by the compression of the pistons. You only have roughly 175-185 PSI compression, this will NOT defeat the retention of the threads. Look at the hole in the head...How may threads are damaged? If it is just the end of the hole, the plugs was not in "all of the way". If ALL of the threads are bad, the plug was inserted improperly, and damaged the threads in the head. Rethreading (a "heli-coil") will correct you condition, if properly done.
Hope this helps.

here are the specs for the spark plugs, just in case.







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fuel pressure: 47-52psi

compression: minimum - 135psi
max variation between cylinders: 28psi