NefMoto

Hi, someone has replace the oem 3 bar sensor map for a 4 bar sensor map ??
I changed the IP_PRS_IM_MES map with the new linearization but an error P0606 DTC appears and the motor stops...

Any idea??

Regards

wrong sensor. wrong scaling. i have done this with 2 bosch 4 bar sensors with custom adapter harness.

proper wiring, scaling, and all is ok.

Ok, thank you k0mpresed

I'm sure someone will say differently but the Bosch 0059 map sensor will not work correctly in the manifold. Sure you can tweak the maps but they physically can not read low enough so will cause issues, subtle ones but they will be there. Run an absolute sensor then if works perfectly.

215mv is not low enough? factory 3bar map is 200mv.
not disagreeing with you, just curious your opinion.

the original factory scaling for these 4 bar sensors is 215mv > 4461mv.

with incorrect scaling my car has shown:

15099 - MAP/MAF <-> Throttle Position Correlation
          P0068 00 [096] - -
          Intermittent - Not Confirmed - Tested Since Memory Clear
20590 - Manifold Pressure Sensor (G71)
          P1158 00 [232] - Implausible Signal
          MIL ON - Intermittent - Confirmed - Tested Since Memory Clear

however, with factory correct scaling all running issues seem to have been solved.
low load/dsg downshifts were not correct.
with correct scaling, all drives ok.

IIRC 500/4500 and 500/4000 is the scaling, at least used on diesels, maybe they actually are capable of reading lower. From what did you lift the scaling?

But I concur, with correct scaling there are no issues.

the scaling was pulled from an original software. a friend lent me the information.
he stated the scaling was hard coded in the tdi files. honestly, i do not know enough about those files.

the information i was told showed scaling at what i posted previously and this works properly in the s3 from what i have driven so far.

Diesel is not hardcoded at all. Can be changed at will, and that's where the sensor is used (CGQB), the scaling is as I wrote.
It is possible the sensor can read lower than what is used in the diesel files, this is quite easy to check actually with a vacuum pump and a multimeter.

298mv is the lowest i could get the sensor to read.

Which sensor are you using? I was talking about the boosch 0059 one and using the supplied scaling it really did not work well at idle, after some messing around I got it to work but then others manifested, at this point I kind of gave up and went with the AEM sensor which scaled as per the documentation and has worked perfectly since. the AEM is expensive though so am working on a cheaper absolute sensor at the moment but all this is only as we are going over 2.3bar which upto there is fine on the stock 3 bar map sensor and the 4bar in the PUT

I will soon have TTE555, which sensor map do you recommend
thank you

TTE claim to make 550bhp with 2bar boost so in theory the stock map sensor will be fine. You would only need a the 4bar put sensor. You can run upto around 2.2bar kn the stock map sensor without issue but regular 99ron fuel at that boost is going to lead to low timing and cylinder hide faults which you can only get around with wmi or E fuel.

There is no bosch sensor with can read 350/400 kpa and measure correct below 40 kpa.
You can get it running on 4bar 059 bosch sensor, but will never run perfect.
I'm will test now with other brand sensors and see if i can find something that is linear until 20 kpa.

Hopefully, people will start listening as despite people like Johan saying the above it still gets ignored and people wonder why they have issues!

Anyway the AEM 3.5 and 5 bar sensors work ok, there is also another 5bar sensor that works I don't have the details on and the MPX absolute sensor can be made to work as well .

I've also got a few other 4 bar map sensors which claim to read low enough but I've not had a chance to test or even think they will!

Fact is if you're going to spend the money on getting over 2.2bar and c540bhp then the £150 for the AEM is small price to pay really.

+1 for Dan, true post.

(https://uploads.tapatalk-cdn.com/20190630/e221c2490c34877ec3e6a2dd6efcef4b.jpg)
This works perfect with mpx 4 bar sensor.
But quite Some work.


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so, my idea worked?  ;)

Yes perfectly! Thanks.


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great. guess i will install the test sensor in to my own car.  :P

nice proper oem function here.  8)

I always linearized 4bar map sensor in every car I tuned starting from 215 mv and I never had any issue. Even my 4 bar bosch PUT sensor in my Leon Cupra 290 stage3 I made linearization this way and it works perfectly. Anyway if they needed to use a different 3 bar map sensor for the intake manifold (100-3000 mbar) instead the normal 3 bar map sensor (200-3000 mbar) upstream throttle, maybe 215 mv could not be enough...

So you never tuned the fuel trims and timing right in a single one of these cars, well done.
These sensors do not show plausible values below 500 mV, it's been tested and confirmed using a vac source, end of story.

The 4 bar Bosch sensors are 500 - 4500 mV in every single stock file. 500 mV for 500 mbar and 4500 mV for 4000 mbar.
The "215" curve is some made up bullshit by someone, then posted over and over on some forums.

If you need to measure below 500 mbar (and on a 2.0T in the intake manifold you do), then this sensor is not suitable.

What idea is that ?

Hi guys,

To those who care: There are sensor out there which are capable to sens pressures between 105hPa to 3980hPa.

They have also NTC integrated which behaves exactly like stock map sensor.

Perfectly suiting for simo18 cars. With almost 100% OEM lock. Find picture attached.

BR

Just use 4Bar PUT sensor and 3Bar MAP sensor up to 2.2bar boost pressure and it will be absolutely ok!

It’s up to you, using a sensor out of his specification / datasheet.

If you want to drive 3.2 bar and you have an overshoot ECU will not recognize this.

10% margin on to you target is needed from my opinion

Seems you have no idea what you wrote here....... Lazy google bit more?

Please don't post stuff like this.

Part number?

This is my experience without having any issues. Of course a safety margin is always desirable and 4Bar PUT needs proper scaling. Please clarify what are you talking about because your comment doesn't help me?