For the engine hard to start when cold try this:

test fuel pressure
test coolant temperature sensor
test starting device of KE fuel injection system

For the other problem it could many things causing the rich condition. An cold engine will always run rich not lean. You will have to test the KE injection system and see what it is wrong.

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

Not necessarily if there is a problem with the cold enrichment logic either in the computer or the EHA valve. Could possibly be the temp sensor sending false warm temperatures.

Can you test the KE computer for fault codes? I've told him he needs to run through the basic tests of the system as well (fuel pressures, etc).

Thanks,

__________________
Dave

2002 Audi S6 Avant
1983 300D
1984 300D (sold)
1990 560SEL (sold)

In my case I ordered a new temp sensor (the 4-pin one) and am going to see if that makes a difference.....it won't be here till the end of the week, but for now the car seems to be running fine without the valve connected....still has tremendous power. Easily pulls to the max of each gear.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

a cold engine will always run rich. Just hook a tool such as the snap on solius or modius and monitor the oxygen sensors if you dont believe me...

a faulty temperature sensor will cause the car to stay in a rich condition.

You can get fault codes from the ke control unit and mas. Search the forums on how to build it.

__________________
1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)