When my 1998 A4 Quattro 2.8 V6 is cold (not run for an hour or more) it takes 5 seconds of cranking for the engine to start. When warm (has been less than an hour since it was run), it starts right up. I have done the following with no difference:
Replaced the Fuel Pump
Replaced the Fuel Filter
Replaced the Fuel Pressure Regulator
Had the Fuel Injectore cleaned (not replaced)
Replaced the Coil Pack
Replaced the Spark Pluge
Replaced the Spark Plug Wires

Where else could the problem be? Thank you in advance for any help

 

Did you find the problem? My car is doing the exact same thing.

 

I have had the same issue with mine since they replaced the timing chain tensioner. I was thinking of getting a fuel additive next.. running out of ideas. Always run premium from a station that I know has good gas..