94 22re misses at idle

think its time to remove the head and renew the gasket ,also remove the valves and renew the seals and gring them in a bit ,maybe even renew the valve springs ,or buy a newer vehicle as its nearly 20 yrs old

Sound like a lack of fuel. Since you have replaced most of the ignition parts, I would look at the fuel system next.
Could be a clogged fuel filter, weak fuel pump, or pump relay.

Do a compression test. The pistons and rings may not seal enough anymore. Try push-starting it in 2nd gear. When you push it ,it will turn the engine faster and build up more compression, enabling combustion to take place. Aslso check if the fuel pressure regulator is not leaking through the vacuum hose, causing it to flood.

Be aware that this vehicle has a low oil sensor. Below 1 quart low will disable ignition(NO SPARK) Check oil often. Perform an OBDII scan with a print out. The print out will be your guide to parts replacement. If you get it to run, the cheapest approach is to Replace Air filter. Also the Fuel filter and install a can of B&G44K fuel additive to the fuel. It will condition the fuel pump and injectors. The B&G is only available at dealerships(11.00 a can at Toyota).Do not substitute, it is the best on the market. Do these 3 things every 30,000 mile for continued performance. Due to the age (1999) I would recommend changing the timing belt and water pump as it runs off of the belt and you are already in there. I don't think it has timing chains. Do not throw the distributor away, its probably OK.

inspect the wiring for loose connections or bad wiring.

try adjusting first the distributor by turning it. It should adjust the timing. Other than that inspect the timing on the timing chain or the chain may have developed a slack.

One other thing you should check judging it being a 1993. Check the fuel pump pressure for adequate fuel supply to all those new components. If you don't get the correct pressure you will experience back firing and inconsistency in your engine performance.

Have you tried replacing the oxygen sensors. These signal to lean the gas or rich the gas for emissions.

It had a new cap and rotar and plug wires put on from the people I bought the car from .People told me it started having this problem after they installed the new parts they bought at Autozone so I went and purchased the factory wires ,and dist.cap from a reputable parts store and replaced them and bingo ,no more problem.When buying ignition parts do not go cheap and buy from Autozone.

timing chain is streched replace chain and gear set

if it wont hold an idle then one or more of the cylinders are probably too low or high in compression and if it's backfireing then the ignition timming could be off. I would take a compressin test of all cylenders and if they are all in range I would hook up a timming light to se if the timming is out