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Hi,
You do have quite the puzzle!
Interesting enough to ask, are you using a K-jet Lambda Sond setup or is it converted to an LH system? If so, what year engine? Big differences!
Have you checked both ground cables or even the small positive wire over for that matter, for any high resistances. I gather you are able to crank the car from the cabin or not?
There are two wires for each side of the battery.
What I’m saying is, the vise grips made a better circuit for the electricity than the “on going circuitry” at that time.
Maybe you smoked a bad small positive wire over to ground.
If the whole car is dead, that is one thing, but you are zeroing in on no spark and no fuel pumps.
The K does not have electric injectors.
On both systems they are fed by the small positive wire to a terminal block on the left fender.
On the LH’s there is a 25 ampere in-line fuse to the injector system.
Next, In either case,
You need a signal from the distributor to start anything no matter which system and the harness is down there between the engine and the steering column going to the distributor.
As far as that goes, so are the starter terminals!
How big of an arc did you get?
Was there a large burn mark on the pliers or a tiny spot?
From here, I have no idea where you had the vise grips.
Down below or on the steering wheel end as a substitute handle? There is a horn circuit in there and it works going to ground.
Are the wipers working, the turn signals or the high beams. All is hot, out to the flipper relay when the car is running.
Boy, this is sifting through a bunch of “What ifs .... ?”
I think we need more details of what is working and how answers!
Phil
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