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Old 05-21-2009, 03:43 AM   #1
unclestarfish
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Join Date: Dec 2005
Location: Worcestershire
Posts: 2
My Ride: BMW E46 330d Touring
Red face E46 330d starting problems

Can anyone help me? my 330d turns over nicely but struggles to fire. This is worse on a warm engine. A mate has put a diagnostic meter on it and the fuel inlet pressure was very low and only when this reached the same value as the common rail pressure would the engine start. Any suggestions ? could this be a sticky fuel shut-off valve or fuel shut-off valve solenoid ? BMW want to replace the high pressure fuel pump but I am not confident about that as it runs really well once it has fired. Any advice will be greatly appreciated.
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Old 05-22-2009, 02:28 PM   #2
old grey steve
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Join Date: Jul 2008
Location: Hertfordshire Thats In The UK
Posts: 138
My Ride: BMW 330D Sport Auto
Cam or Crank sensor could well be the answer and this is sometimes overlooked, the 330d needs fuel pressure for sure to fire and if this isn't right then on the key it may take a bit of time.

I've had the pump under the drivers seat replaced as this can also be a weak link which you indicated that the BMW dealer also wants to look at and fuel pressure on the rail can also be an issue as you've discovered as are the issues regarding injectors but don't over look the cam or crank senor because what happens is that the engine tries with a turn of the key to fire the ECU doesn't receive the correct values straightaway from these sensors and it'll not fire until the ECU is satisfied. Might be worth a look as that's where my money would be
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Old 06-03-2009, 03:44 AM   #3
unclestarfish
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Location: Worcestershire
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My Ride: BMW E46 330d Touring
330d Starting problem solved

Thanks Old Grey Steve, I had heard about these sensors but was not sure they were the cause. I tracked down a Bosch Diesel Specialist (Transport & Plant in Kidderminster). They did a leak back test on all injectors and found 2 with very high flow rates (50 and 90) with the other 4 being between 7 and 10!. They changed these 2 injectors and the car now starts fine. It's all about getting the pressure in the commonrail (min 180 bar) which the ECU needs to see before it allows the fire up. A little bit of knowledge ........ Thanks again E46 Forum.
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Old 04-06-2014, 07:27 AM   #4
kavi44
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Where in sa can I do that leak back test

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Old 04-06-2014, 07:28 AM   #5
kavi44
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Quote:
Originally Posted by unclestarfish View Post
Thanks Old Grey Steve, I had heard about these sensors but was not sure they were the cause. I tracked down a Bosch Diesel Specialist (Transport & Plant in Kidderminster). They did a leak back test on all injectors and found 2 with very high flow rates (50 and 90) with the other 4 being between 7 and 10!. They changed these 2 injectors and the car now starts fine. It's all about getting the pressure in the commonrail (min 180 bar) which the ECU needs to see before it allows the fire up. A little bit of knowledge ........ Thanks again E46 Forum.
Hi havind the same problem

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Old 04-06-2014, 07:28 AM   #6
kavi44
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What's a leak back test

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