Perhaps unrelated but I just got done replacing all the rubber components on the intake side of the engine.

When I installed the air flow meter and fuel distributor assembly I didn't quite get the AFM boot to seat fully over the butterfly. This cause a massive vacuum leak that would not allow the engine to start.

I was able to get it to start by pressing down on the AFM thus causing the fuel distributor to flow fuel to the injectors.

Later I found my mistake and corrected it and now the car starts normally.

So maybe you have done this too or something similar?

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