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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Has anyone with a 2011 E9X had their LPFP go out?



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      12-13-2018, 02:05 PM   #45
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Quote:
Originally Posted by Welcome to NBA Jam View Post
Using INPA or another scanning tool and checking rail pressure after shutoff, then again after three hours should be a good indicator. If the pressure falls below 70kpa, then you may have an issue with your fuel pressure regulator.

The car should be around 500kpa after automatic fuel pump priming.
Thanks for the tip. I'll try to do that this weekend and check back.

Though, I'll admit I'm not 100% familiar with all the ins and outs of INPA. How are you able to get INPA to read rail pressure without going through the "fuel rail test" that re-primes the pump? Or are you just talking about the value that the rail sensor reads? If so, would using MHD to see the active rail pressure work the same?
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      12-17-2018, 12:02 AM   #46
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Honestly, I have the opposite problem as everyone else...When my car's cold it'll start right up. But if I've been driving and the engine is all the way warmed up, and say I stop at a convenience store or something for ~5 minutes, when I come back to start the car it'll long crank for anywhere from 3-5 seconds. It seems to be more pronounced/frequent if I've been driving "spiritedly". It only happens when the engine is fully warmed up, and only if I turn it off for a short period of time then come back to start it back up...In the 2.5 years I've had the car, it's never failed to start, but the odd long cranks have been an occasional thing since I've owned it. Always assumed it was my HPFP on it's way out, and one day it would kick the bucket and I'd replace it, problem solved. Well, my pump died ~10k miles ago, but the long cranks persist
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      12-17-2018, 08:48 AM   #47
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Quote:
Originally Posted by CurtisP87 View Post
Honestly, I have the opposite problem as everyone else...When my car's cold it'll start right up. But if I've been driving and the engine is all the way warmed up, and say I stop at a convenience store or something for ~5 minutes, when I come back to start the car it'll long crank for anywhere from 3-5 seconds. It seems to be more pronounced/frequent if I've been driving "spiritedly". It only happens when the engine is fully warmed up, and only if I turn it off for a short period of time then come back to start it back up...In the 2.5 years I've had the car, it's never failed to start, but the odd long cranks have been an occasional thing since I've owned it. Always assumed it was my HPFP on it's way out, and one day it would kick the bucket and I'd replace it, problem solved. Well, my pump died ~10k miles ago, but the long cranks persist
Thats exactly how mine behaves. But its rare not like every day or anything.
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      12-17-2018, 08:11 PM   #48
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I'm getting my HPFP replaced.

Are the ebay ones any good? Any recommendations?
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      12-17-2018, 09:20 PM   #49
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I wouldn't get one off of eBay.
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      12-18-2018, 08:20 AM   #50
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Quote:
Originally Posted by Vampire335i View Post
I'm getting my HPFP replaced.

Are the ebay ones any good? Any recommendations?
Just get a reman HPFP off FCP Euro. Cheap for what it is and you get a lifetime warranty if it ever goes out again.
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      12-18-2018, 08:33 AM   #51
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Please don't use ebay... jesus.
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      12-18-2018, 09:05 AM   #52
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Quote:
Originally Posted by Vampire335i View Post
I'm getting my HPFP replaced.

Are the ebay ones any good? Any recommendations?
one of the the most critical components of your car.. Imagine going highway speeds during a pass then ur ebay HPFP shits the bed.
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      12-18-2018, 10:58 AM   #53
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one of the the most critical components of your car.. Imagine going highway speeds during a pass then ur ebay HPFP shits the bed.
Funny people say these things without actually having it on their car

Have you had it on your car to say your 2 cents?
https://www.e90post.com/forums/showthread.php?t=1390721
https://www.e90post.com/forums/showthread.php?t=1390721

I'm not one to put ebay parts on my car. Everything I have on my car is through ECS tuning or genuine OEM. I asked if anyone has experience using it, if you don't, then don't chime in.
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      12-18-2018, 11:07 AM   #54
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Quote:
Originally Posted by Vampire335i View Post
Funny people say these things without actually having it on their car

Have you had it on your car to say your 2 cents?
https://www.e90post.com/forums/showthread.php?t=1390721
https://www.e90post.com/forums/showthread.php?t=1390721

I'm not one to put ebay parts on my car. Everything I have on my car is through ECS tuning or genuine OEM. But responses like these are obvious
The thing is you just dont wanna take a chance with some components..

To add life time warranty from FCP for 400 bucks. My box came packaged from germany it looked brand new straight from germany..

Take the advise when it just makes sense.

Ebay is where i get LED strips lol
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      12-18-2018, 11:24 AM   #55
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I'm going to get the import direct from O'Riley. Its OEM. It's a few hundred dollars and comes with a 5 year warranty. I have a gift card for their so I guess this is a good time to use it.
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      12-19-2018, 08:09 PM   #56
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Quote:
Originally Posted by Vampire335i View Post
I'm going to get the import direct from O'Riley. Its OEM. It's a few hundred dollars and comes with a 5 year warranty. I have a gift card for their so I guess this is a good time to use it.
That's not a bad choice at all. Sometimes auto parts stores resell OEM parts (good example, E46 Duralast wheel bearing is made by Timken). I'd be curious to see if this one is OEM.
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      12-21-2018, 02:10 PM   #57
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I figured I would post these here first before making a new thread considering this is more than likely fuel related.

Here are 3 different logs of early morning cold starts. Any insight from those more knowledgeable than me would be greatly appreciated.

This first one is the outlier as it didn't even start. I had to turn the car off and back on again (which stops the logging on MHD).

https://datazap.me/u/geirsenk/long-c...og=1&data=3-13

https://datazap.me/u/geirsenk/long-c...og=2&data=3-13

https://datazap.me/u/geirsenk/long-c...og=0&data=3-13

And for science, here is a log of a typical start that fired relatively quick.

https://datazap.me/u/geirsenk/more-c...=2&data=0-3-13

Thanks guys!
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      12-21-2018, 02:26 PM   #58
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Quote:
Originally Posted by SnapCoupe View Post
I figured I would post these here first before making a new thread considering this is more than likely fuel related.

Here are 3 different logs of early morning cold starts. Any insight from those more knowledgeable than me would be greatly appreciated.

This first one is the outlier as it didn't even start. I had to turn the car off and back on again (which stops the logging on MHD).

https://datazap.me/u/geirsenk/long-c...og=1&data=3-13

https://datazap.me/u/geirsenk/long-c...og=2&data=3-13

https://datazap.me/u/geirsenk/long-c...og=0&data=3-13

And for science, here is a log of a typical start that fired relatively quick.

https://datazap.me/u/geirsenk/more-c...=2&data=0-3-13

Thanks guys!
Dude the first thing i noticed is that ur fuel pressure reading before crank should be 40 PSI. ITs 18 .. its too low. thats the first real problem that i see.
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      12-21-2018, 02:55 PM   #59
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Quote:
Originally Posted by SnapCoupe View Post
I figured I would post these here first before making a new thread considering this is more than likely fuel related.

Here are 3 different logs of early morning cold starts. Any insight from those more knowledgeable than me would be greatly appreciated.

This first one is the outlier as it didn't even start. I had to turn the car off and back on again (which stops the logging on MHD).

https://datazap.me/u/geirsenk/long-c...og=1&data=3-13

https://datazap.me/u/geirsenk/long-c...og=2&data=3-13

https://datazap.me/u/geirsenk/long-c...og=0&data=3-13

And for science, here is a log of a typical start that fired relatively quick.

https://datazap.me/u/geirsenk/more-c...=2&data=0-3-13

Thanks guys!
To give u an idea here is a log when i used to log my starts for misifre issues i had:

https://datazap.me/u/pladi/log-good-...0&data=4-15-16

My fuel pressure is 70 PSI before cranking.

https://datazap.me/u/pladi/log-bad-c...0&data=4-16-17

These logs were recorded for my misfire issues but it shows what my readings are. My cranks were instant there.

Your shows 18 PSI.. seems quite low.
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      12-22-2018, 09:47 AM   #60
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Quote:
Originally Posted by Pladi View Post
To give u an idea here is a log when i used to log my starts for misifre issues i had:

https://datazap.me/u/pladi/log-good-...0&data=4-15-16

My fuel pressure is 70 PSI before cranking.

https://datazap.me/u/pladi/log-bad-c...0&data=4-16-17

These logs were recorded for my misfire issues but it shows what my readings are. My cranks were instant there.

Your shows 18 PSI.. seems quite low.
Thats what I was thinking too. I wasn't sure what PSI its supposed to be primed at normally, but 18 seemed low regardless. Now to figure out whats causing the fuel pressure drop while the car is sitting. I'm leaning more towards the regulator at this point because I feel like if it was the LPFP I would be having drivability issues, right?
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      12-22-2018, 10:39 AM   #61
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Quote:
Originally Posted by SnapCoupe View Post
Thats what I was thinking too. I wasn't sure what PSI its supposed to be primed at normally, but 18 seemed low regardless. Now to figure out whats causing the fuel pressure drop while the car is sitting. I'm leaning more towards the regulator at this point because I feel like if it was the LPFP I would be having drivability issues, right?
Yeah its hard to say i am not that familiar with that part of the system someone else can chime there.
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