Difficulty starting '99 7.3 Super Duty diesel

A new glow plug relay arrived. Is it still difficult to begin?

5 Likes

The glow plugs were last changed when? Usually, they start to lose their effectiveness after around five years.

5 Likes

Not five years ago, but I will probably have them tested.

4 Likes

After I replaced my GP and GPR, my 2000 would start instantly down to about 10 or 12 degrees. It never got any colder before I sold it, but I am sure it would have started even lower.

4 Likes

Although this has happened previously, I am astonished by how soon it happened.

3 Likes

First, clean the posts and clamps on batteries. My own just got underway at 13F today. At the mid-40s, it labored before cleaning.

3 Likes

Is it an OEM starter? If so, I would recommend upgrading it.

2 Likes

OEM replaced about 4 years ago.

1 Like

In case it sounds feeble while cold, I would think about replacing it. My XDP starter spins the engine more quickly than the original design. There are other brands that, I think, go by the name of gear reduction.