Everything in elec. system has been replaced including coil distributer ecm.,but car will start one day but not the next,leave it sit a couple days and it runs again.

NO you don't replace the ECM. Replacing the ECM is the LAST thing you deal with as its a lot of work and can be VERY expensive to do.
Engines need 3 things to run. Fuel, Air and spark. You have only checked the spark system.
What Exactly does the vehicle do when you turn the Key? Check the air filter is clean and then check the fuel supply system.

Read OBD codes. See link how to.

https://honda-tech.com/forums/honda-accord-1990-2002-2/90-93-accord-obd1-cel-codes-2630683/

At
www.reliable-store.com
get
complete guide on whether to repair or not, service it, and how to repair etc, along with wiring diagrams, electrical diagrams, torque specs, error codes, everything.

very interesting indeed. My first impression would be replace the fuel pressure regulator. if that doesn't do the trick i'd look at the engine temp sensor to the ECM. beyond that, replace the ecm.

It fried the control mudgel on the distributer,It is on the back part of the distributer, Buy the bottom of the distributer cap,

there may be a damaged wire coming from the receiver ring which sits round your ignition lock, this "reads" your key and allows the starter to turn your engine over so if there is an intermittant fault here that could cause your non-starting.

Really silly questions now!

If it is an auto box! have you got in any gear other than Park??
Have you checked the immobiliser????
Crank angle sensor is ok?????

I've experienced problems with Jag's in the past! this sounds crazy but check that the coolant temp sender is not worn out and shorting on the bonnet liner! sounds crazy but this has hapened before! shorted out the entire ignition system!

does a 85 have a ECU unit ??? sounds like it could be the switching transistor thats either under the coil or inside the distributor should look like a black plastic casing with 3/4 wires running to it then to the coil look at this first as often motor runs ,stop for a quickie somewhere and jump back in and engine will not fire up ,classic symptons

I think it's the fuel pump or the fuel pump filter.

Check the fuel system that's where your problem is, my bet is your fuel pump has left this world to a better place.

I had the same problem recently but replacing the ignition Coil under the distributor (inside) solved the problem. Also replaced the distributor Cap and rotor at the same time.