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Author running car without AFM
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 07:50   View User's Profile U2U Member Reply With Quote
potentially what damage can this do to a car?
willay
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Registered: 10th Nov 02
Location: Roydon, Essex
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12th Aug 08 at 07:59   View Garage View User's Profile U2U Member Reply With Quote
What car? surely it needs the AFM to run full stop otherwise it doesnt know how much air is flowing into the engine? (if on std management i guess??)
Kerry
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Registered: 5th Oct 01
Location: Norwich
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12th Aug 08 at 08:03   View User's Profile U2U Member Reply With Quote
thats what i thought!
didnt think a car would run without one....
or it runs but not very well...
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 08:05   View User's Profile U2U Member Reply With Quote
well technically the pipe with an AFM in is on BUT its the wrong way round and it pulls hard. so car runs fine with the AFM pipe on wrong way round =\
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 08:08   View User's Profile U2U Member Reply With Quote
pipe looks like this -

Kerry
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Registered: 5th Oct 01
Location: Norwich
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12th Aug 08 at 08:12   View User's Profile U2U Member Reply With Quote
but its connected?
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 08:14   View User's Profile U2U Member Reply With Quote
the pipe is on, but the wrong way round, if you look on the pic it has clips on one end of the pipe, this side connects to the airbox, i have it currently connected onto the pipe to the inlet
Kerry
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Registered: 5th Oct 01
Location: Norwich
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12th Aug 08 at 08:16   View User's Profile U2U Member Reply With Quote
i meant connected as in plugged in?
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 08:19   View User's Profile U2U Member Reply With Quote
yes its plugged in still.
FruitBooTeR
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Registered: 18th Jan 07
Location: Wolverhampton Drives: S15
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12th Aug 08 at 08:20   View User's Profile U2U Member Reply With Quote
Cant you just turn it round
Kerry
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Registered: 5th Oct 01
Location: Norwich
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12th Aug 08 at 08:21   View User's Profile U2U Member Reply With Quote
then i dont think it matters
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 08:21   View User's Profile U2U Member Reply With Quote
if it put it back round the correct way as it should be the car struggles and hesistates and wont go past 4.5k revs, when the pipe is on the wrong way round car pulls very very hard BUT idles a bit lumpy?
Kerry
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Registered: 5th Oct 01
Location: Norwich
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12th Aug 08 at 08:25   View User's Profile U2U Member Reply With Quote
is it new?
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 08:27   View User's Profile U2U Member Reply With Quote
no, AFM is over a year old.
Kerry
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Registered: 5th Oct 01
Location: Norwich
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12th Aug 08 at 08:30   View User's Profile U2U Member Reply With Quote
Then sounds like you need a new one

Have you tried cleaning it?
Spraying carb cleaner through it while reving sorted the problem I had with mine for a short time but then I had to replace it...
Superlite Ltd.
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Registered: 9th Jan 07
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12th Aug 08 at 08:38   View User's Profile U2U Member Reply With Quote
Some vag TDI owner take their AFM off. Then on the electrical connector they bridge the terminals with a resistor.

Result, ecu thinks engine is getting max air all the time and fuels like a badger.
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 08:39   View User's Profile U2U Member Reply With Quote
yea it smells like its overfuelling. all i wana know is what risks this does to the engine? AFM is still plugged in, just turned wrong way round and car pulls fine.
pow
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Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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12th Aug 08 at 08:47   View Garage View User's Profile U2U Member Reply With Quote
You can't run a car without an AFM. If you unplug it, the ECU throws up an EML and replaced the sensor values with "guessed" values, to make the car driveable.

My guess would be it's dangerous the wrong way round, overfueling, rich mixture gunna burn something out?
Superlite Ltd.
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12th Aug 08 at 08:47   View User's Profile U2U Member Reply With Quote
shouldn't do any damage unless its really overfueling.
BarnshaW
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12th Aug 08 at 08:51   View User's Profile U2U Member Reply With Quote
dont think its really overfuelling, no smoke or nothing.
Kerry
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Location: Norwich
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12th Aug 08 at 08:53   View User's Profile U2U Member Reply With Quote
is it drinking more fuel?
Superlite Ltd.
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12th Aug 08 at 08:55   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Kerry
is it drinking more fuel?


If CTS is still working its not going to over fuel badly
BarnshaW
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12th Aug 08 at 08:58   View User's Profile U2U Member Reply With Quote
CTS? and its pretty much the same on fuel, maybe a tad more then usual its using. i think i shall just leave it. if it blows up then it blows up.
Superlite Ltd.
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Registered: 9th Jan 07
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12th Aug 08 at 09:00   View User's Profile U2U Member Reply With Quote
coolant temp sensor

ecu uses this data for fueling (as well as others)
BarnshaW
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Registered: 25th Oct 06
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12th Aug 08 at 09:02   View User's Profile U2U Member Reply With Quote
cheers guys. ps sorry for not puttin in help zone

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