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#1 | ||
FF.Com.Au Hardcore
Join Date: Jan 2007
Location: Port Lincoln, SA
Posts: 5,129
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So youve probably guessed by the title, and youd be right to assume, that my IAT has fallen out of my new 3" CAI pipe, i didnt use my fail safe while in a hurry (cable tie around another hose) and it has been leaning on my headers and melted. No captain hindsights would be appreciated
![]() Can i just solder a new one on the existing lines? Does anyone have one for me?
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cheers Shaun Current SY FPV F6X Territory #214 Previous FG MkII G6E Turbo built by Heinrichs Performance and Tuning BFII FPV TORNADO #0021 351rwkw - Heinrich Performance and Tuning "Milk is for babies. When you grow up you have to drink beer" - Arnold Schwarzenegger |
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#2 | ||
Banned
Join Date: Dec 2007
Posts: 3,290
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Mine did same thing burnt it to a crisp just buy a second handy and wire the two lines back together that's what I did no issues at all since!
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#3 | ||
not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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If you can't be stuffed ordering one from Rockauto I've got one here. You can either give me $20 for it or order me one when you get around to doing it.
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2024 F150 XLT
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#4 | ||
rexnet
Join Date: Feb 2010
Location: Adelaide, South Australia
Posts: 3,562
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whats a IAT ?
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#5 | ||
Banned
Join Date: Dec 2007
Posts: 3,290
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Intake air temperature sender
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#6 | ||
rexnet
Join Date: Feb 2010
Location: Adelaide, South Australia
Posts: 3,562
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Ahhhhh. I see.
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#7 | ||
5.6L x 2 pilot
![]() ![]() Join Date: Dec 2009
Location: Canbra
Posts: 14,989
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To answer your original question Shaun, I would say that it is pretty critical for your tune operating efficiently. Intake air charge temp is used in serveral locations within your tune, so if the value seen by your ecu is not correct, your tune will not run at it's most efficient.
Good luck with it. Stu
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2002 AU II LTD 5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust. Quarter Mile: 13.73 @ 105.86mph Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024 ![]() 2002 XR8 pursuit 250 Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH
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#8 | |||
FF.Com.Au Hardcore
Join Date: Jun 2010
Posts: 4,759
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Quote:
Or double snap lock bag stick in freeze wait then recheck it. I know some people use a GM IAT sensor as it reads true not sure if it will fit / work on the AU. Would be best to do some research and find out, it may have some benifits. |
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#9 | ||
5.6L x 2 pilot
![]() ![]() Join Date: Dec 2009
Location: Canbra
Posts: 14,989
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OK, no need for silly freezer bag tests. I have just gone and performed a test by logging the results of ACT (Air Charge Temp) with the IAT unplugged. Interesting result.
Upon startup, the ACT was equal to ECT (Engine Coolant Temp). I thought that this was interesting, but after about 30 seconds, the ACT went to a static 80 degF. IAT circuit was open circuit. You could speculate that if the IAT circuit was short circuit (ie both wires melted to extractors), the ACT would be static at a maximum value. I was not going to short the wires together for the sake of this test. So with ACT static at 80 degF, what is this going to impact? Going through my tune I have identified some of the following functions that use ACT. WOT Advance vs ACT - at 80 degF, no advance is pulled at WOT (on my tune - which that part should be stock), but as intake air temp goes over 100degF, timing is pulled at WOT in varying amounts (dependant on Tune). Probably not a critical factor, but timing is pulled at higher temperatures to protect the engine. Fuel Base OL - your ACT is factor in determining your target AFR in Open Loop mode (along with ECT). This is just a couple of functions that rely on the ACT. There quite a few others as well to do with cold startup functions. The real impact I believe is that if your IAT circuit is short circuited indicating a really high ACT, you could expect that large amounts of timing will be pulled from your tune when it doesn't need to be. So in summary yes, the IAT is important. Not critical, but as pointed out originally, important to ensure that your tune is running at an optimum. Cheers Stu
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2002 AU II LTD 5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust. Quarter Mile: 13.73 @ 105.86mph Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024 ![]() 2002 XR8 pursuit 250 Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH
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#10 | ||
not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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Might be putting my foot into something here and not to offend anybody but seriously, if it's there it is there for a reason. Leave the food storage products in the cupboard and put the damn thing back - problem solved.
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2024 F150 XLT
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#11 | |||
FF.Com.Au Hardcore
Join Date: Jun 2010
Posts: 4,759
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Quote:
My point which i failed to make clearly was more aimed at tuning / performance. The genuine ford IAT sensor can often give a false high reading of the ACT. This would means your tune is not using a true reading to work out when and how much timing to be pulled etc. So it could be costing your power / tuning accuracy. The snap lock bag / freezer test is just one way to lower the temp of the sensor to a known temp and then see what the volts read and cross reference this to see what volts that temp equals. Or plug it back in to the car and see what it reads on the data logger. When you finish testing it you plug it back into the car before driving it. As you can read in my original post I said you can just do it in the car on a cold morning or as Stu did. The better sensors perform and the faster they react to changes and provide accurate readings the better your data logging and tuning should be etc. Probable makes little difference to the daily driver. Cosworth and GM IAT sensor can be a better option for tuning. I hope this clears things up and that I actually made sense this time ![]() |
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#12 | |||
Walking with God
Join Date: Mar 2005
Location: Melbourne
Posts: 7,321
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Quote:
GK
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2009 Mondeo Zetec TDCi - Moondust Silver 2015 Kia Sorento Platinum - Snow White Pearl 2001 Ducati Monster 900Sie - Red Now gone! 1999 AU1 Futura Wagon - Sparkling Burgundy On LPG Want a Full Life? John 10:10 |
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#13 | ||
not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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Hey Shaun still no payment for this one? Can you PM me please, got it ready to go.
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2024 F150 XLT
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#14 | ||
Regular Member
Join Date: Jun 2008
Location: Tassie
Posts: 408
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On another note, how would you know if it's not working and needed replacing? Would it come up on my scan tool?
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#15 | |||
not here much anymore
Join Date: Dec 2004
Location: Sthn NSW
Posts: 22,918
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Quote:
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2024 F150 XLT
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#16 | ||
With da Warlords
Join Date: May 2006
Location: Orange NSW
Posts: 1,781
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I would also be worried about the un-metered air entering the engine (MAF sensor is before IAT). This could cause the car to run lean at WOT aswell. So until you fix it, I'd suggest blocking it off.
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You don't have to be faster than the bear, you just have to be faster than the slowest guy running from the bear. For Sale: Parachute. Only used once, never opened, small stain. Windsor Warlords AU III XR-8220 ![]() ![]() XR50T Ute - 300rwkw (give or take depending on the day)
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#17 | ||
Banned
Join Date: Dec 2007
Posts: 3,290
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when my burnt itself to death you could defiantly tell somethings wasnt right idle was crap and revs not so good
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#18 | ||
FF.Com.Au Hardcore
Join Date: Jun 2010
Posts: 4,759
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![]() ![]() http://oldfuelinjection.com/?p=29 This link may help if he wishes to test the new sensor is working correctly. |
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