engine won't start, s2 3b 91 mod coupè

[powercar]

yes i did, and it came out with 0V.
what could be wrong?

[Knight Rider S4]

I would take out the fuel relay and bypass it , cross over the connection so the fuel pump has a live feed and try and start the car

[newsh]

Hmm, could it be an ignition switch problem?

[powercar]

newsh- i don't think it has something to do with the ignition switch

[powercar]

well, i haven't been able to do something with the car for a couple of weeks now, but today i've bypassed the fuel relay and the fuel pump runs just fine when i'm bypassing it but not with the fuel relay in but the car didn't start when i tried to start it when i bypassed the fuel relay, i also testet the inductiv sensors g4 and g28 with a osiloscope, i've got signals from the g28 but not from the g4, couldn't test the hall sensor because the battery in the scope went out and i forgot to bring the charger with me

[powercar]

today the car just started when i where checking for spark at the spark plugs.
after i had put the spark plug back in it's place i tried to start the engine again and it started right away without any problems.
the idle was ok, took a 15 min test drive and no problem what so ever.

i still can't understand what the fault have been or still is.

anybody have a clue?