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      04-03-2018, 03:23 PM   #1
whyyoumontague
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Fuel rail pressure drop with cylinder 5 misfire

I made a new thread because many of the symptoms of the previous thread have been addressed with a replaced Valve Cover Gasket and this is could be completely unrelated.

I have a misfire in cylinder 5 after new coils, spark plugs and new VCG.
I test the pressures in my fuel rail which hold steady at:

High: 55 bar
Low: 5 bar

Then when the motor is shut off the high instantly drops to 4.5 bar and low remains unchanged. Upon restarting the motor, the high pressure jumps to 170 bar and comes back down to 55 bar.

Iím guessing a leaking injector is the culprit to all of these issues, I just would like to be reaffirmed in this.
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      04-03-2018, 08:51 PM   #2
dsjr2006
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Quote:
Originally Posted by whyyoumontague View Post
I made a new thread because many of the symptoms of the previous thread have been addressed with a replaced Valve Cover Gasket and this is could be completely unrelated.

I have a misfire in cylinder 5 after new coils, spark plugs and new VCG.
I test the pressures in my fuel rail which hold steady at:

High: 55 bar
Low: 5 bar

Then when the motor is shut off the high instantly drops to 4.5 bar and low remains unchanged. Upon restarting the motor, the high pressure jumps to 170 bar and comes back down to 55 bar.

Iím guessing a leaking injector is the culprit to all of these issues, I just would like to be reaffirmed in this.
Did you check if youíre eligible for the injector recall? Might be able to get them for free?

There is a link to the BMW site to check your VIN in this thread: http://www.e90post.com/forums/showthread.php?t=1327136
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      04-04-2018, 01:31 AM   #3
whyyoumontague
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Quote:
Originally Posted by dsjr2006 View Post
Did you check if youíre eligible for the injector recall? Might be able to get them for free?

There is a link to the BMW site to check your VIN in this thread: http://www.e90post.com/forums/showthread.php?t=1327136
Thank you for that link! unfortunately I just checked and I only have the blower motor and the airbag one (i had no idea, so ill be getting this done).



I did order some used ones today so heres to hoping this is the issue.
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