cold start misfire
Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: BMW 5 Series
Forum Discription: This forum will deal with any issues on the BMW 5 Series (E12, E28, E34, E39, E60 & E61)
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=49290
Printed Date: 10-May-2024 at 13:37
Topic: cold start misfire
Posted By: johnnydev
Subject: cold start misfire
Date Posted: 14-November-2012 at 21:46
| 2002 e39 530i rough running on start-up.. problem clears when temp guage hits 12 o'clock no emissions light comes on swapped ignition coils with known good ones!!! plugs have done just over 15k problem seemed to coincide with running out of fuel (with 40 miles range showing)a few weeks ago any ideas?? |
Replies:
Posted By: Andrew Rolland
Date Posted: 15-November-2012 at 09:01
|
You should still have had enough fuel in the tank to have avoided it sucking in sludge, I've had both my E39 and E60 down to less than 30 mile range and appart from me stressing about finding fuel the car has been fine. You might have picked up a bit of sludge from the tank.
Are you using good quaility fuel?
Could just have been coincidence on the fuel thing. Fill up from empty with VPower and put a fill of a fuel system cleaner in the tank. Might be an injector partially blocked.
Or could be needing an oil change. Oil when worn out on a cold start up will make the engine sound rough.
How is the air filter? Might be worth checking the MAF and any air hoses for leaks etc. When was the fuel filter changed? I could do with swaping mine out while I'm thinking about it.....
It won't take long for a big 6 pot to have its temp gauge hit normal. ------------- Be exclusive and drive a Petrol 5 Series! Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto |
Posted By: johnnydev
Date Posted: 15-November-2012 at 19:19
|
castrol edge 0-30 in june only ever used this stuff (£35 from ASDA 4litres) it's had 4 oil services since bought in may2008...temp guage always hits 12 o'clock in 2-3 miles and has never moved whilst going. is maf the mass airflow sensor on the inlet manifold?? ummm errr fuel filter has not been changed since I bought the car thanks for your advise
|
Posted By: Andrew Rolland
Date Posted: 16-November-2012 at 09:00
|
I've moved this post into the 5 Series Forum.....
The MAF will be between the air filter housing and the inlet manifold.
Sounds like the oil is o.k. good quality stuff regular enough, how is the oil level? Going by what you say about the temp gauge, that sounds normal and healthy.
If it continues it might be worth getting a diagnostic done.
Could be a crank or cam sensor on its way out or something on the EGR/PCV side of things begining to go the way of the dodo. ------------- Be exclusive and drive a Petrol 5 Series! Current '13 62 F10 535i MSport Auto Previous '04 04 E60 545i SE Auto '03 53 E60 545i SE Auto (Stolen) '98 S E39 523i SE Auto |
Posted By: Sporty1
Date Posted: 16-November-2012 at 09:31
|
Start with getting the codes read.
------------- 
Sport Evolution Schwarz #043 |