Issues with 4BAR TMAP

pysical · 07-08-2016, 11:54 AM

I have a 09 335xi that is FBO + Inlets + RB Turbos + Meth. I have a tune for just 93. I then added meth and used it for about 1 month as a cooling option before I got the 4Bar added. For last month I have drove around with the 4BAR added but using the flash for a stock sensor. I had no issues with it, I had to check the 4bar in MHD of course. So now I got a flash from my tuner which is a 4bar base. And now I am having issues.

I can reset the codes on the car, and then a few hours later after driving the car and then letting it sit. I will get a 2ABD Pressure intake sensor rerunning with a Engine Malfunction light. I can reset the code, but it will come back a few hours later. The car doesn't feel any different. Not sure if this is a faulty sensor or if the MAP settings in the flash are off?

BQTuning · 07-08-2016, 12:35 PM

Have your tuner revert your "TMAP conversion" table back to stock stock config, and the MAP max voltage to 4.65 and then when flashing select the MHD 4bar support.

MM Performance · 07-09-2016, 12:55 AM

Quote:

Originally Posted by BuraQ

Have your tuner revert your "TMAP conversion" table back to stock stock config, and the MAP max voltage to 4.65 and then when flashing select the MHD 4bar support.

Ah maybe that's why mine was messing up. I used the 4bar settings you posed and also selected the 4bar on MHD when I flashed. So I should set back to stock and select on MHD only? What are the stock settings again?

BQTuning · 07-09-2016, 04:10 PM

Quote:

Originally Posted by MM Performance

Ah maybe that's why mine was messing up. I used the 4bar settings you posed and also selected the 4bar on MHD when I flashed. So I should set back to stock and select on MHD only? What are the stock settings again?

Its a crap shoot. Seems to be more pronounced with cars that run I8A0S. So, revert the TMAP Conversion table back to factory settings, and set the "MAP Max Voltage" table in the map itself to 4.65, and then when flashing select the MHD 4bar support option.

MHD Tuning · 07-11-2016, 08:26 AM

Quote:

Originally Posted by BuraQ

Its a crap shoot. Seems to be more pronounced with cars that run I8A0S. So, revert the TMAP Conversion table back to factory settings, and set the "MAP Max Voltage" table in the map itself to 4.65, and then when flashing select the MHD 4bar support option.

That will not be enough if the map uses the 3 points conversion table, with improper 4 bar values.

07-08-2016, 11:54 AM	#1
pysical Captain 132 Rep 713 Posts Drives: 2009 335xi Join Date: Feb 2016 Location: Laurel MD iTrader: (1)	Issues with 4BAR TMAP - Engine Malfunction I have a 09 335xi that is FBO + Inlets + RB Turbos + Meth. I have a tune for just 93. I then added meth and used it for about 1 month as a cooling option before I got the 4Bar added. For last month I have drove around with the 4BAR added but using the flash for a stock sensor. I had no issues with it, I had to check the 4bar in MHD of course. So now I got a flash from my tuner which is a 4bar base. And now I am having issues. I can reset the codes on the car, and then a few hours later after driving the car and then letting it sit. I will get a 2ABD Pressure intake sensor rerunning with a Engine Malfunction light. I can reset the code, but it will come back a few hours later. The car doesn't feel any different. Not sure if this is a faulty sensor or if the MAP settings in the flash are off?
	Appreciate 0 Tweet Quote

07-08-2016, 12:35 PM	#2
BQTuning Banned 475 Rep 4,392 Posts Drives: 2012 Z4 sDrive35i M Sport 6MT Join Date: Nov 2010 Location: bq@bqtuning.com iTrader: (0)	Have your tuner revert your "TMAP conversion" table back to stock stock config, and the MAP max voltage to 4.65 and then when flashing select the MHD 4bar support.
	Appreciate 0 Quote