some car u need to floor the gas inorder to start. It does sounds like flooded or no gas

if u have a can of cold start try it, if flooded then should be equally hard to start, if no gas then it should fire up right away.

Or pull a plug to see if its wet.

my fnd's 560 his ATF was disappearing, we think it went into the vacuum too. As modulator diagphragm broken, also find it very hard to start after driving for a while.
1st start is always good. Now car sold we got rid of the prob.

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