Hi,

I have a 87 300DT with just over 200K. The problem with it, is starting.
After been stopped overnight, it will not start. When I crank the ignition
key, it looks like wants to start, but doesn't. If I am lucky, it eventually
starts. Another times it will not. I replaced the preglow relay, and the
problem didn't go away.

1) Should I replace the glow plugs? Because I don't have a meter to
measure the current without spelliting the wires, I have not tested the
wires and the plugs. I will get one today. However, the resistance of
the glow plugs #'s 1, 2, 4, 5 and 6 is 0.9 Ohms. I couldn't reach #3.

2) Can it be the temperature sensor? Yesterday, it was a warm day. The
car started at the third time I cranked the engine. I stopped the car
and 5 hours later, it started first time. This morning, it is much colder
here, I had no luck.

3) In another posts here, other owners mentioned having problems when
the injectors pump leaks. I see a leak on top of the injectors pump.
Could it be the cause?

4) Yesterday, I measured the voltage from the starter wire to the preglow
relay. When I cranked the engine, I measured 5 volts and while cranking,
the voltage went to ZERO. Is this normal? If not, what could be wrong?

TiA,
Demi