Start up Smoke

[zeuss]

Originally Posted by cleatus12r

Usually glow plugs are only tested by putting a test light to the terminals. The clamp will go on the positive battery post and the pointy end of the light will go on the terminal for each glow plug. However, this test is pretty hit-or-miss and the proper way is to check the resistance.

My friend and I were bitten by the resistance check though about a month ago. All glow plugs tested good on a cold engine. Once current was supplied to the glow plugs though, some would go open (no continuity through them and hence no heat) and he would have a hard start and rough running once it started.

So what is the best way to check them. I checked them at the plug after driving 50 miles. I hate to say it, but glow plugs are the only thing that makes sense to me for this much white smoke. If I pull them, is there a chance they might be shorter from being burned so much. Thanks so far and please keep helping. I in jam and need truck.