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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 > HPFP on its way out?



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      07-30-2018, 01:26 PM   #1
NRigs
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HPFP on its way out?

I have been noticing a strange noise coming from where the HPFP is once the car has heated up and at idle. The noise goes away as soon as I give it gas.

Here is a short video of the noise:
https://www.dropbox.com/s/piull3b8xf...74504.mp4?dl=0
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      07-30-2018, 05:46 PM   #2
tbmd
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Quote:
Originally Posted by NRigs View Post
I have been noticing a strange noise coming from where the HPFP is once the car has heated up and at idle. The noise goes away as soon as I give it gas.

Here is a short video of the noise:
https://www.dropbox.com/s/piull3b8xf...74504.mp4?dl=0
You talking about the clicking? I think that noise is common with our cars. There is a thread somewhere about that, and I don't think anyone has figured it out.

The HPFP does suck in general tho, lol.
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      07-30-2018, 07:07 PM   #3
NRigs
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Originally Posted by tbmd View Post
You talking about the clicking? I think that noise is common with our cars. There is a thread somewhere about that, and I don't think anyone has figured it out.

The HPFP does suck in general tho, lol.
You have to listen a little closer. There is second clicking sound. I know the ticking is from the injectors. I am trying to figure out what the second clicking is. It is almost like a rattle.
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      08-06-2018, 09:47 PM   #4
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Long starts and misfires on wot are main symptoms. Try and send a datalog if you can on wot in 2nd or 3rd
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      08-07-2018, 07:27 AM   #5
NRigs
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Quote:
Originally Posted by Chris1337 View Post
Long starts and misfires on wot are main symptoms. Try and send a datalog if you can on wot in 2nd or 3rd
Here is a log from the other day
https://datazap.me/u/nrigs/log-15334...21-22-23-24-25
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      08-07-2018, 07:46 AM   #6
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Quote:
Originally Posted by NRigs View Post
Hard to tell from that... do a WOT pull and get into higher rpms. I believe a healthy HPFP should get the rail pressure up to ~3200psi.
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      08-07-2018, 07:53 AM   #7
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Originally Posted by lwgrenier View Post
Hard to tell from that... do a WOT pull and get into higher rpms. I believe a healthy HPFP should get the rail pressure up to ~3200psi.
Sorry, I don't know why I added that log in there. Check this one out:

https://datazap.me/u/nrigs/log-15334...og=1&data=3-13
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      08-07-2018, 08:16 AM   #8
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Never mind I got my value wrong. I believe rail pressure should be ~2200psi at WOT. The dip you have at the beginning of going WOT looks a little strange... I don't know these cars well enough to know if it's an indication of a bad HPFP. Here's a log of mine on stock tune. You can see how the rail pressure goes up to ~2200psi and stays consistent the whole time I'm at WOT.

https://datazap.me/u/lwgrenier/613-w...a=3-4-16-17-19
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