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MAF sensor MY00???

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Old 28 March 2006, 10:30 PM
  #31  
Andy.F
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Yours is on the borderline Colin with that big garrett hybrid, FMIC and the large capacity 'built' bottom end you're running.
Part throttle on your car wouldn't be nice on a MAF.

Andy
Old 28 March 2006, 10:40 PM
  #32  
Playsatan
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Thats ok mate, don't think I've ever used part throttle in my life. Had pretty much decided to go MAP anyway as the £70 every 2k miles was adding up anyway.

It's up and running now so when I've got some miles on it I'll give you a call.
Old 18 April 2006, 03:48 PM
  #33  
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Id like to do this test as well, where is the MAF, what does it look like :-)

Ta

Originally Posted by ReggieMY99
quick test, unplug MAF while engine running, if it stalls its probably ok

if it surges down in revs and then come up again and settles MAF is knackered
Old 18 April 2006, 03:49 PM
  #34  
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also, how does a knackerd MAF cause a 2-3k rebuild, what is it and what does it do?
Old 18 April 2006, 04:44 PM
  #35  
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it measures the amount of air passing through the induction system.

when it fails it generally underreads - so the ecu doesn't put as much fuel in as it needs to for the actual amount of air entering the cylinder.

This results in an overly lean mix that is likely to det it's t1ts off under load.

The shock loading of this is likely to mash your bearings, if the piston doesn't fail first....

Nice eh ?
Old 18 April 2006, 06:07 PM
  #36  
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got any pics of what this thing looks like so i can do the test please :-)
Old 19 April 2006, 08:49 PM
  #37  
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Its between the pink sticker & the two pipes (near the coolant res) and faces backwards as you look at the pic.
Normally has a grey wiring plug connector that you squeeze together to release the lugs that hold it on, then pull backwards to get it off.
The MAF comes out after you undo two security Torx bits - sometimes needs a gentle lever out with a small screwdriver as a rubber band helps seal it in.

Chris
Old 19 April 2006, 08:49 PM
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BTW - The pic is off a MY99 / 00 version and the MAF is located on the side of the big pipe - hope that all makes sense
Old 19 April 2006, 10:02 PM
  #39  
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thank you
Old 20 April 2006, 08:04 AM
  #40  
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No problem []
Old 20 April 2006, 03:36 PM
  #41  
StudentScooby
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Originally Posted by ReggieMY99
quick test, unplug MAF while engine running, if it stalls its probably ok

if it surges down in revs and then come up again and settles MAF is knackered
Is this method safe?
Old 20 April 2006, 08:06 PM
  #42  
Andy.F
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No, not safe.

Reset the ECU, if it idles rough then it is probably shot.

To verify this, beg, steal or borrow a wideband lambda and check the AFR at full throttle, it should be in the high 10's to low 11's at full boost/high revs. If it's in the 12-14 bracket then you have literally seconds to meltdown under these conditions
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