Difficult starting 85 308QV US

Hello, I am fairly new to the site and I have been fascinated by all the information sharing that goes on and I love it. Now my problem if anyone can advise and I am sure there must be threads on this already.
I am having difficulty starting my car regardless cold or hot. I haven't driven the car much and it always ran very decent. Once the cars starts it runs very smooth and plenty of power on the highway. Recently I didn't pass smog so I decided to do a lot of maintenance and replacing old parts like fuel filter, fuel pump, new gas, wires, dist caps, rotors, coils, plugs, extenders, crank sensors, grounded digiplexes, WUR, cold start injector, O2 protection relay, injectors.

Bear in mind these items were either 18 years old or some even original so I didn't mind replacing parts trying to solve my problem, in fact everytime I changed something the car improved in performance. Once the car starts after about 5 to 6 attempts it goes to high idle at about 2500 rpm and after warmup drops to about 1100. I don't think it is a fuel problem otherwise it would run poorly.

I am guessing somewhere in the ignition system and I connected one of those spark plug test lights from Autozone to each of the coils. One end was connected to the coil and the other end to ground. I did this to see if the coils were delivering spark to the distributors Cranked the car and the light would have a soft glow then a sudden flash of light and then back to a glow and flash again. Could this mean maybe the car is having a hard time starting because of a weak spark??

Any advise is appreciated and thanks to all.

 

Thanks for the responses. Yes battery is new, coils were replaced with a spare set but not new but tested good, alternator is good, digiplex cleaned and grounded. I'm going to try Birdman's new fuseboxes and replace all the original 25 year old relays. Any other suggestions are welcome. Once car starts it runs very strong and fast on highway and nice idle.