my audi coupeGT dont start when its cold

[Mathieu Tetrault]

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When my car is cold it starts very well. But if I turn it off and try to
restart it won't. No explosion.  I need to wait like 15 minutes to
restart.
I am sure its something like a sensor or valve that it broken or most
likely disconnect.  Recently we change the air filter and I think we
forgot some connector. I saw 2 one pin connector lying near the intake
air duct. I search for some sensor with no wire but found noting. I
don't recall seeing those before. If someone can help.  Thanks

Mathieu Tetrault
1986 Audi coupe GT

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