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#1
05-10-2010, 10:33 PM
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Quick question related to the MAF!
01 X5, 4.4i - 124k.
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Some Of My Mods:     Some Of My Mods In Text: 1. Depo Headlights 2. Weathertech Window Guards 3. eBay/Sony Rear DVD Players 4. JVC NX7000 Navigation System NOTE: IF anyone likes these mods and needs some help with installing them on their X5s, please feel free to PM me, I am more then happy to help! 
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#2
05-10-2010, 10:41 PM
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number of times MAF was used = 6
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#3
05-10-2010, 11:25 PM
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Quote:
__________________
Some Of My Mods: Some Of My Mods In Text: 1. Depo Headlights 2. Weathertech Window Guards 3. eBay/Sony Rear DVD Players 4. JVC NX7000 Navigation System NOTE: IF anyone likes these mods and needs some help with installing them on their X5s, please feel free to PM me, I am more then happy to help!
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#4
05-11-2010, 07:17 PM
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It is ok to drive with it unplugged as it won't damage anything, and it should run ok. The SES light will come on. What happens is the DME doesn't see a signal/reading from the MAF and has to substitute its own default values just judging by the RPM, load on the engine and O2 readings etc.
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"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is 
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#5
05-11-2010, 10:32 PM
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Thank you very much Weasel
 Before I go ahead and mess anything up, is there any simply D.I.Y. on how to disconnect the MAF? I never did disconnect it before and I just am a little precautious about it.
__________________
Some Of My Mods: Some Of My Mods In Text: 1. Depo Headlights 2. Weathertech Window Guards 3. eBay/Sony Rear DVD Players 4. JVC NX7000 Navigation System NOTE: IF anyone likes these mods and needs some help with installing them on their X5s, please feel free to PM me, I am more then happy to help!
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#6
05-11-2010, 10:38 PM
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Quote:
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#7
05-11-2010, 11:28 PM
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And you should be able to use any ODB2 code reader to clear the SES light afterwards.
__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is
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#8
05-12-2010, 07:07 PM
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Well,if it runs ok without MAF connected,so please explain to the dumb what precisely MAF affects?
I just disconnected it and no SES light so far,what I can say,I can say that shifts are softer...should my MAF be already bad? Quote:
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#9
05-12-2010, 07:15 PM
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Hard to know if it is bad or not when it isn't far out enough to cause mixture faults. But what the MAF does is measure the amount of air being sucked in the engine and the temperature of it etc. so the DME knows how much and how dense or air is in the combustion mix thus how much fuel to spray. Then it uses the readings from the O2 sensors to see how the combustion did and if it needs to add or subtract fuel from the next combustion cycle.
__________________
"When you do things right, people won't be sure you've done anything at all" (Bender, futurama) You make something idiotproof, they'll make a better idiot You think professional is expensive, just wait until you pay for amateur. Never let your sense of morals prevent you from doing what is right. Examine what is said, not who speaks. X5 pics RIP 4.6is..... 2003 4.6is
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#10
05-12-2010, 07:58 PM
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I remember when I unplugged my MAF one time to troubleshoot a poor running condition I had. It would trip the Trans Failsafe program when unplugged. I don't know why but when I plugged it back in, Trans Failsafe would go off again. It appeared to me that the vehicle was not driveable with the MAF unplugged for this reason.
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2010 Lexus RX350 still new 2003 BMW X5 3.0i w/sport package w/68K miles. (gone Thank God!) 2002 Dodge Ram 2500 4X4 cummins diesel w/198K miles, custom repo truck 2009 Scion tC w/46K miles 2007 Suzuki SV650 custom streetfighter 2000 Lexus GS400 w/165K miles
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