I did it a few weeks ago, and was shocked, when I connected it, I was better but still sluggish and s t, but after a bugger up with my ecu and Whippy fixing it, I'll put the lexia on tomorrow and see if there's any codes to be had. I've reading about some ways to test it so will try that too.
Has anyone else disconnected theirs and it went worse
Are you sure you mean MAF? The device measures the amount of air measuring the engine, then an ECU calculates how much fuel to add.
Without it there can be attempted calculation, but it will not be as reliable for the whole range of operating conditions. Some tuners might want to remove its slight restriction to the airflow, but they will add a different type of sensor and reprogram to match.
Did you instead want to remove EGR?
Last edited by andy5 on 05 Feb 2013, 09:42, edited 1 time in total.
Why would you be surprised that it ran worse with the maf disconnected stu ? It's there for a reason.
With no MAF/MAP sensor the ECU can only estimate air flow based on temperature, throttle opening and engine rpm, which is not very accurate.
Simon
2016 Nissan Leaf Tekna 30kWh in White
1997 Xantia S1 3.0 V6 Auto Exclusive in Silex Grey 2011 Peugeot Ion Full Electric in Silver 1998 Xantia S2 3.0 V6 Auto Exclusive 1997 Xantia S1 2.0i Auto VSX 1978 CX 2400 1977 G Special 1129cc LHD
I disconnected it to see if it was it was fkd....it cant be as it ran worse
I did it because it's bloody sluggish and tried a few diffirent things and thought I'd try that, but i guess after trying the maf, it's fine, dont know what to do/try now
I still don't see the logic behind disconnecting a vital piece of the engine management system and concluding that because it runs worse with it disconnected that it must be ok ? Sure, it's doing something, that doesn't mean its working properly...
It's as if you had a faulty spark plug lead that was causing an intermittent misfire, then concluded that because disconnecting the plug lead entirely made the engine run even worse that the plug lead must be ok... makes no sense...
Last edited by Mandrake on 05 Feb 2013, 13:44, edited 1 time in total.
Simon
2016 Nissan Leaf Tekna 30kWh in White
1997 Xantia S1 3.0 V6 Auto Exclusive in Silex Grey 2011 Peugeot Ion Full Electric in Silver 1998 Xantia S2 3.0 V6 Auto Exclusive 1997 Xantia S1 2.0i Auto VSX 1978 CX 2400 1977 G Special 1129cc LHD
Mandrake wrote:I still don't see the logic behind disconnecting a vital piece of the engine management system and concluding that because it runs worse with it disconnected that it must be ok ? Sure, it's doing something, that doesn't mean its working properly...
It's as if you had a faulty spark plug lead that was causing an intermittent misfire, then concluded that because disconnecting the plug lead entirely made the engine run even worse that the plug lead must be ok... makes no sense...
Because after reading in a few places that sometimes slugishness especially below 2 grand can be faulty MAF and since it only take literally 2secs to discconnect and try it, I did.....it ran a bit worse like that, so might not be it but emailed the results to someone else who's looking into it
t, but after a bugger up with my ecu and Whippy fixing it, I'll put the lexia on tomorrow and see if there's any codes to be had. I've reading about some ways to test it so will try that too. 
Sure, it's doing something, that doesn't mean its working properly...