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Author Topic: MED9 HPFP & LPFP Control  (Read 53442 times)
birchbark506
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« Reply #135 on: April 08, 2018, 07:12:33 AM »

Tha is guys I not touch that 3rd map since i am.not running CDL cam's I'll do some logs and see if my request and actual hits around I think 129.5 is when the stock fprv opens up, I'm having high ltft around 10-13% and stft sits around -2 to -3%
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prj
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« Reply #136 on: April 08, 2018, 07:59:49 AM »

Your trims have nothing to do with your pump control whatsoever.
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birchbark506
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« Reply #137 on: April 08, 2018, 10:24:46 AM »

I didnt think so, but I'm still new at learning, sorry
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prj
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« Reply #138 on: April 08, 2018, 12:35:12 PM »

The pump control you can see if you log requested vs actual rail pressure. If it's tracking quite well, you're good.
Fuel trims can be for example injector settings, maf settings or fkkvs depending on how much your car is modified.
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birchbark506
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« Reply #139 on: April 08, 2018, 01:04:10 PM »

I didnt touch my injectors setting or maf settings  or fkkvs and I have 3" catless downpipe,  axle back exhaust K&N typhoon cold air in take, gfb dv+ and a godspeed twin inner cooler, stage 1 vis motorsports hpfp stock lpfp
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prj
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« Reply #140 on: April 08, 2018, 01:33:27 PM »

That intake is gonna skew maf readings that's why you have issues with the fuel trims.
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Khendal
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« Reply #141 on: April 08, 2018, 02:42:18 PM »

That intake is gonna skew maf readings that's why you have issues with the fuel trims.

FKKVS Top left zone...is the solution to the trim ?
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gman86
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« Reply #142 on: April 08, 2018, 02:47:17 PM »

FKKVS Top left zone...is the solution to the trim ?

FKKVS is injection correction. KFKHFM is MAF correction.

Since the trims seem to be thrown out by the intake, I'd say working on KFKHFM would be the best start.

Clear fault codes, do a 4th gear run from as low RPM as possible to red line and log Lambda control. Stick 5-7% across KFKHFM and repeat and observe the difference. From there, you should be able to figure out where needs less or more correction and dial in more accurately. Alternatively, install a better intake.
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prj
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« Reply #143 on: April 08, 2018, 03:02:10 PM »

Fuel wise it makes little difference on how to do it.

However...

Check if when actual boost = requested boost your actual load is not higher than requested load.
If your actual load is higher than requested load and your fuel is rich then do it through KFKHFM, because that will bring your load down, help with torque intervention and get your timing maps reading correctly again (vice versa if your trim is positive).

However, if it the load looks alright (more or less on target, or slightly below), then fkkvs is the way to go.
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Khendal
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« Reply #144 on: April 08, 2018, 04:08:40 PM »

... if the car is MAFLESS ? Only through FKKVS?
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birchbark506
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« Reply #145 on: April 08, 2018, 04:47:28 PM »

i run a MAF and here are some logs my timing is quite high of -9% Sad
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birchbark506
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« Reply #146 on: April 08, 2018, 04:51:59 PM »

gman86 on map KFKHFM would you minus on the number or add exp load 95.3 @ 2000 RPM is 1.0001 would i go down to 0.**** or 1.****
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prj
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« Reply #147 on: April 08, 2018, 11:40:49 PM »

... if the car is MAFLESS ? Only through FKKVS?
If your car is running alpha-n then god help you. You will never ever get it to run right in vacuum, because it's running in a limp mode designed to get you to the closest service point - there is no way to measure the intake air with the throttle not wide open, so do whatever.
If you have a TT-RS, RS3 or RS6 (no MAF from factory), then to adjust load you need to edit the VE maps, and for fueling you can use FKKVS.
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birchbark506
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« Reply #148 on: April 09, 2018, 03:06:22 AM »

I added some logs to take a look at and tell me what you thing please,  I dont think I have a vaccum lake but maybe a boost leak at around 4000 you can hear, I'm going to do a leak down test today.
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birchbark506
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« Reply #149 on: April 09, 2018, 05:02:49 PM »

so i added 5-7% on the map KFKHFM now i see LTFT around 4-6%  also done more logs, they look at bit better
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