re. 1989 Audi 200 QT - Hard Start Need Help

[Swann, Benjamin R. (BSWANN)]

[89 Audi 200 QT runs great but has a difficult long hard crank when it has
sat for awhile.]

Install new Fuel injectors.

[Local german auto mechanic performed tune up replacing breather hoses,
spark plugs etc.  Invoice says that he checked cold start system, warm up
regulator, fuel injection system, fuel pressure, etc.  He concluded that I
needed a new $1,270 ECU.  Says that fuel pump is not turning on correctly on
start up.]  You can hot wire the FP by sticking a fuse in the FP Relay.  If
you need an ECU, which I doubt, someone on this list will get you one for
far cheaper, for example I have one.

[Using a volt-OHM meter I tested the ECU connection to the fuel pump relay.
It sure looks like the ECU is sending a brief 10 volts or so to the relay
when cranking the engine.  The fuel pump relay is making a loud click when
it receives this signal.  Additionally, I jumped the fuel pump relay for 10
seconds or so before starting the car noting that it still has a long hard
crank.  Not positive but this sure sounds like the ECU is doing its job and
that the problem is not associated with a lack of fuel.] OK - but with
injector leakdown, jumping the FP relay won't improve the situation much if
at all.  BTDT.  Sounds even more like injectors.

[This mechanic kept the car for three days so he could test the "cold start"
each morning.  I think he simply ran out of ideas and knew that a $1,300
suggested fix would be rejected and he could go onto his next project.]
Start with the obvious - fuel injectors.  I got sucked into the route of
checking fuel pressures, etc.  Spent a lot of time, proved nothing.
Installed new fuel injectors and viola!

[Unfortunately, I still have a car which needs fixing.

One last thing that might give a clue as to what the actual problem might
be.  I noticed that right after I tested the ECU connection to the fuel pump
relay (which required cranking the car with the fuel pump fuse removed) the
car started right up.]  Right, cause the system is able to prime the
injectors, and they have not had a chance to leak down again.

[I assume this procedure would have eliminated any fuel sitting in the
engine.  I also noted that when I go on vacation and leave the car unused
for 10 days or so it starts right up.] How often do you go on vacation?

[Any suggestions would be appreciated.

Thanks
Kevin]