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Author Topic: MED9 HPFP & LPFP Control  (Read 66326 times)
vwaudiguy
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« Reply #165 on: February 19, 2019, 06:25:50 PM »

In your case it shoud be the LPFP controller!

Why not log low pressure?
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
Tezotto01
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« Reply #166 on: February 20, 2019, 04:40:29 AM »

In your case it shoud be the LPFP controller!

My LPFP is OEM and the pressure on the bearish line remains stable between 4.5 to 4.8Bar
When upgrading the HPFP does it need to reduce the pressure in the LPFP? This does not make sense to me ...
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Bitshifter
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« Reply #167 on: February 20, 2019, 06:56:37 AM »

My LPFP is OEM and the pressure on the bearish line remains stable between 4.5 to 4.8Bar
When upgrading the HPFP does it need to reduce the pressure in the LPFP? This does not make sense to me ...

No! You don`t understand the fueling system. In case of the controler shut down, it is overheated. Log LP @ time of your problem an see by yourself Wink 
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Tezotto01
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« Reply #168 on: February 20, 2019, 12:17:06 PM »

No! You don`t understand the fueling system. In case of the controler shut down, it is overheated. Log LP @ time of your problem an see by yourself Wink 

Before I draw conclusions see the problem I posted, I reported that I am having problems with high pressure excess, at no time did I say that my LPFP to, I know very well how the supply system works but it seems to me that you do not understand it .
I do not understand why I would overheat the low controller being that I own LPFP OEM and the power of the car is still OEM.
I am injected RS4 and HPFP updated, only after calibrating this step will follow in the other calibrations.
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Tezotto01
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« Reply #169 on: February 22, 2019, 10:09:28 AM »

Moving on to leave feedback on my problem.

I was able to solve my problem by studying the VSTMSV, AMSV and HDR functions.
Now my actual pressure follows the requested even at high rotations.
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mister t
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« Reply #170 on: September 10, 2019, 05:21:09 AM »

 I didn't read the entire thread but has anyone tried the low pressure pump  upgrade from torquebyte

 https://torqbyte.com/products/vag-pm4-high-power-fuel-pump-control-module

It's $700 USD but it allows up to 36 amps of draw at the low pressure end so you can run a significantly upgraded low pressure pump which allows for more at the high pressure end

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Bitshifter
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« Reply #171 on: September 10, 2019, 07:46:27 AM »

There`s no need for this crap, just buy an TT-RS-controller+Pump or an other upgrade pump (IIRC ~240€, bar-tek).
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nokiafix
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« Reply #172 on: September 30, 2019, 06:29:20 AM »



 If you are having issues with the lpfp controller cutting out then you just need to setup the hardware to cope with the extra demand, on the hpfp there is a little brass fitting for the lpfp feed. just drill this out to 5mm and your lpfp controller will be working a lot less effort to make the required power.
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