OK  a brain teaser i guess

The Story
I take a run for about 6 Hrs just fine
On the return trip I feel like engine looses power 2-3 times for a moment
I think it is just my foot slip on the petal...
The Climax
1 Hrs from home it looses all power / & wont start but will crank over

The Intrigue
Not a lot tools with me & no meter :(

I get partner to turn on but not start the fuel pumps buzz's
the way it quit no splutter just 1 sec power the next nothing
it feels like a electronic/ignition issue,

I go looking for engine grounds corroded terminals broke wires dont spot
anything..
so i have spare ecu/coil try those nope ...
I mess around for about 1 hrs long enuff i figure for any heat related issue
to back off

The Punch Line
Still no start, so I have an you can eat BCAA membership (5 x160Km, & 2
x320KM ) tows a years...
I make the call they arrive 30 mins later, I try 1 more time no go so we
jack it up on the truck
& tow the 80KM home, I give it another hail mary try on the truck at home
that SOB starts
& has started on the hour for the last 2 hrs !*^&!@%(*^!@%^*&!@

OK what do i do here other background
85 1.9 Digijet
-no recent work in last 30 days
-temp2, cap, rotor, o/2, 2 relay(fuel/?? in the back box) plugs./wires all
new
-engine grounds clean & new spades on
-new afm 3 years ago
-rebuilt injectors 6 mths ago
-cant be coil or ecu since when it was dead i swaped spares in
The irrelevent details
-new alternator, starter motor in last 6 mths

so wtf am i left with ??
-bad relay / wiring ??
ignition control module ??, dist/hall sender ??
-fuel injection ??

ps
I just did 15K KM with no issue this summer :)