Try watching the battery voltage as the glow plugs are cycling ~ if it drops below 11.2 VDC at the battery while they're heating , either the battery is low charge & needs a deep , _long_ charge at 10 Amperes or less , or the battery is Kaputi or maybe just the terminals are corroded .
I assume you kknw that pumping the throttle on a Diesel engine whilst cranking , will prevent it from starting .
-Nate
Don wrote:
>
> When we last visited my garage queen 240D (1979) she wouldn't start and I
> was busy checking the fuel system. After verifying that fuel was indeed
> getting to the injectors, it was suggested I check the glow plug system
> (Thanks, Brian.) Everything appears to be Ok but.with a fully charged
> battery (13.1v at the terminals) the glow plugs are only showing around 10.7
> volts. Will the plugs work at 10.7V? Is this voltage drop normal? If not,
> is the likely culprit the relay? As a side note, a previous owner had
> retrofitted the car with the pencil style glow plugs (Bosch) and wired them
> in parallel. As the ambient temperature in my garage for the past two days
> has been over 70 degrees I tried to start the car. No joy.
>
>
>
> -Don in St. Louis
>
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