Check lift pump output. Or if you have a primer pump. Have someone pump it while you start the car. Plus keep pumping it after the car starts. Of course if it continues to run well the lift pump will require further testing.


I suppose the relief valve may be stuck open is also another possibility. But as the primer pump is used a stiffness should develop if that relief valve is normal.

Also remember that in a series string of glow plugs they will still appear to be working if one towards the front of the engine shorts internally to ground. Since your car actually starts and dies out. This should not be the problem.


Anyone play with the idle control knob on the dash? Our 77 300d would not get going after the daughter turned it down years ago. That is if your year has one.