3

everyone! I've googled about this issue, but couldn't find much info. I hope that someone could help.

I have cold start issue below -10C(14F). If it just -10C it harder to star, but if temperature drops to -15(5F) I have to I have to start 6-10 times until I get car to start. The first 2-4 times it doesn't start at all, after that car starts and immediately chokes (turns off) and I try to start until car really starts or battery dies.

I have this problem 4 years. The thing is that past 4 year that cold that I couldn't start car was only few days or week per winter.

First year I noticed problem, but I got warmer so I didn't do anything. Next year changed glow plugs, but after change it wasn't that cold so I didn't know if it was fixed. Last year winter was warm, I couldn't start the car 1 time. So I wanted to fix car for this winter. In fall I brought car for diagnostics, they told me I have to change glow plug control unit. But they didn't have it at that time, so I bought one myself and changed. I also bought USB OBD wire with INPA,DIS etc. First I connected car, there was glow control unit fault, but it wasn't current(DIS) so I cleared it and it won't came back. And there wasn't any other errors regarding to this issue.

So yesterday -10C, today -12C(10F). And I still have the same problem! Today first time tried to start, it started up but it was lauder and twitching and a bit vibrating, sounded like all cylinders wasn't working. I connected PC with INPA try to read error memory and car choked. (that was at same time within 30sec when first time car started). I had to start 4 more time to get it work. After it warmed up a bit vibrating etc. and engine sounded normal. I know if I had pc connected a bit later when car would be warmer it wouldn't choked.

Error codes I got today(DIS): DDE - 4600 DDE: Rail-pressure plausibility pressure-controlled-positive control deviation DDE - 4453 DDE: Injector, cylinder 5, activation - General fault - Fault currently not present

Yesterday these faults weren't there and I think if temperature increases then these faults won't be there. After car warms up a bit I can drive, turn it off and one without problems.

What could be the problem? It's only in cold weather.

Could it be battery? I've changed it 4 years ago before plugs. If it would be battery now then the car wouldn't start at all, right? Not started and then choked?

I evaluated the battery in DIS, it shows that the battery is around 50% full. When car is running battery voltage is 14,8V so alternator should be OK, right? I don't know how to test battery after night when car is not running. I think if I run DIS but won't start car it will drain the battery.

Any suggestions where to look?

Sorry for this long post, I wanted to explain in detail. And sorry a bit for my english.

Car e60 530d 2004

  • +1 for proper use of units in the description - so many people on here don't! – Nick C Jan 8 '15 at 13:21
  • Have you got the problem solved? My 525iA E60 model has the similar problem. I have almost the same experience as yours. Would like to know which kind of fault it was and how you have solved the problem. BR/Jiaxin – user9926 Mar 27 '15 at 16:18
  • Friend of the family is an ex-mechanic and having the same issue with a second hand 120i he bought for his daughter. He hasn't been able to solve it. Would be very useful to know how this was resolved. – Sammy Jul 12 '18 at 23:20
1

I'm thinking your issue is due in part to two things:

  • Glow plugs - Either you aren't letting them warm up enough or one or more are bad
  • Battery - If you battery truly is at 50%, this may not be enough to get the glow plugs up to operating temperature during initial glow plug warm up. Having the battery tested may be a good start point here.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.