E46 330d glow plugs

[DAB]

Hi Guys

Need some info please. Since temp has dropped (talking about -1-2 and 0 degrees) in my area all of a sudden my baby struggles to start. When i crank it turns fine but doesnt start. Then when i crank again it struggles and then asif battery is also dead it starts. When temp is normal around 7 upwards there is no issues. How would you know if its the glow plugs or the module? Had a code read about a year ago and have error on all 6 glow plugs had the battery changed and was sorted. Checked the charging on the onboard option 19 then 9 and its charging fine. 12.5v when off. 14.2v when idling 14v when lights are on so i dont think its the battery. :fencelook:

 

[Reece7brown]

Hey bud. You can check the glow plugs by removing them and applying 12V directly to each glow plug. If the tip gets hot its working. I know the glow plug module is a common problem on the M57.

 

[haXor]

Fuel Pump Relay, green one below the glove box.... Even with our low temps and assumed glow plug failures, our engines will start. Fuel Pump Relay.

 

[Nikhil]

This sounds like its either crank or cam position sensor. Fyi glow plugs do nothing for us unless it's like like -10 degrees.

 

[haXor]

This sounds like its either crank or cam position sensor. Fyi glow plugs do nothing for us unless it's like like -10 degrees.

When its warm, issue goes away = faulty relay. Had exact same behaviour in my M57N 330d. I swapped the horn relay for the fuel pump relay as they are the same(green) = problem fixed.

 

[Nikhil]

This sounds like its either crank or cam position sensor. Fyi glow plugs do nothing for us unless it's like like -10 degrees.

When its warm, issue goes away = faulty relay. Had exact same behaviour in my M57N 330d. I swapped the horn relay for the fuel pump relay as they are the same(green) = problem fixed.

Yep and I had the exact same issue on the M57N and it was crank sensor lol

 

[Danny2]

Well at least now the OP has 2 possible solutions to his problem