MAF elimination project W210 606 turbo - Page 4 - PeachParts Mercedes-Benz Forum

michakaveli · #1 08-28-2011, 01:35 PM

Quote:

Originally Posted by KarTek

For all you early adopters out there, here are a couple shots of what I'm running right now. I guess I'll consider this a beta test but I'll probably end up leaving it like it is.

I clipped the yellow and blue wires and soldered a 22k, 1/4 watt resistor across them.

Added some heat shrink.

And then some fabric tape to complete the stealth conversion.

Another thing I found out while driving around for a couple days testing is that the ECU doesn't care whether the MAF sensor is plugged in or not. It's just looking for a signal on the yellow wire.

Good luck!

Very nice find and observation(s) thus far... What do you think your chances are of completely removing the EGR sensor and replacing it with a "block plate" on the intake?

kotka · #2 09-15-2011, 11:17 PM

Quote:

Originally Posted by KarTek

For all you early adopters out there, here are a couple shots of what I'm running right now. I guess I'll consider this a beta test but I'll probably end up leaving it like it is.

I clipped the yellow and blue wires and soldered a 22k, 1/4 watt resistor across them.
Another thing I found out while driving around for a couple days testing is that the ECU doesn't care whether the MAF sensor is plugged in or not. It's just looking for a signal on the yellow wire.

Good luck!

hi, my g463 (606.964) has different colored wires set up.....i've checked yesterday the voltage on the MAF sensor plug - it gets 5volts. i wonder which wires have you connected?

btw the way you've done it (I try to recall my student years

) - is it a simple voltage divider?

KarTek · #3 08-28-2011, 03:58 PM

I think that's entirely possible except that we have visual inspections here and I have to leave something there for them to look at...

michakaveli · #4 08-28-2011, 09:16 PM

Quote:

Originally Posted by KarTek

I think that's entirely possible except that we have visual inspections here and I have to leave something there for them to look at...

Another reason I love SC

No inspections...

KarTek · #5 09-16-2011, 06:21 AM

Hi, use the 2 wires on the end near the 5V wire. I think it's either 4, 5 or 1, 2.

This is much like a voltage dividing circuit but the voltage divider will have another resistor to ground.

kotka · #6 09-16-2011, 07:42 AM

Ha- g-wagon maf plug has 3 wires

-5v power
- "-" terminal
- and I guess communication wire

I've put 22kohm, 0.25w resistor between power and communication terminals on the plug - but error p1401 persists. Btwinitial p1404 disappeared. Simple wire between these terminals makes same error. Btw the initial error is p1404 but transducer is not an issue. I changed it and havent noticed any difference. Thus I guess maf sensor is an issue which leads to limp mode. So I want to make ecu ignoring maf. There is no issue with this mod in Russia as ecological standard allow even much older cars to be used.

kotka · #7 09-17-2011, 11:08 AM

Btw just re-checked in the maintenance manual - maf should produce 1.5v at idle and >3v at 2000rpm. Just wonder how you can do this with liniar resistor?

compu_85 · #8 09-17-2011, 12:11 PM

Those values are for a working MAF. It seems if the computer sees "full air" all the time it doesn't get angry.

Does the computer trip an EGR fault code after driving for a while with the mod in place?

-J

kotka · #9 09-17-2011, 12:42 PM

22kohm 0.25watt resistor between power and com pins of the maf plug doesnt work for me - I mean p1401 error remains. tomorrow I will check whether car goes into limp mode with this resistor mod. i would suspect it should as maf sensor error remains

KarTek · #10 09-18-2011, 08:55 PM

I'm afraid that I'm not familiar with the workings of the 3 wire MAF sensor. Sorry.

kotka · #11 09-19-2011, 04:12 AM

this is fine - that's why we use forums - to share knowledge or to encourage ourselves to move forward

btw - simple connect of power and con pins didnt help. I'll try to put voltage divider in there and check again

Olivier · #12 10-01-2011, 01:08 PM

Hi Kartek,
is this 22K resistor eliminating the MAF totally?
Is it all working OK?
Cheers.
Olivier

KarTek · #13 10-02-2011, 08:37 AM

Hi O, yes working perfectly so far.

Olivier · #14 10-03-2011, 02:49 PM

This is funny, I now got 4 working MAF that I got from the scrappy that were working on and off, but it was due to an intercooler leak, if I knoew this ealier it would have save me a wee bit... I have a MAF factory now, not sure the state of them all tho...
Thank you Kartek.
Once again the master is brilliant.

I will try to put a resistor on my MAF see if there is any change in boost or what ever...?
All the best.
Olivier

Olivier · #15 10-05-2011, 04:48 AM

Kartek,
I am waiting on a resistor here, they only got 2 watt tho, not 1.4?
Anyway, just to be sure, did you connect the resistor to the wires going to the MAF or the wires going to the ECU end?
As I am thinking before clipping anything to just take the wires out the MAF without any damage and join them with the resistor, making a loop at the ECU end.
Cheers.
Olivier