North American Turbocoupe Organization



Relocating the ECT
TCLover82 Offline
Member
#1
Trying to relocate the ECT after installing a coolant block-off gasket for the lower intake, and am having a hard time finding a good solution for mounting the ECT inline with the heater hoses. I know some of you here have done this before, but I couldn't find the answer when I searched.

Does anyone know of a good solution for fitting the ECT inline with the heater hose? Like maybe some kind of T shaped copper pipe fitting that the ECT will just screw into? Having a hard time finding anything that looks like it will work locally.

Also, the wires on the new model motorcraft ECT harness are white and unmarked, and the instructions don't say which wire goes to where. Does anyone know what wires go to where from the ECT harness to the 2 colored wires for the old ECT on the engine harness? or are we flying blind on this one and just hoping?


http://i1167.photobucket.com/albums/q639...ECT_01.jpg

http://i1167.photobucket.com/albums/q639...ECT_02.jpg
'88 Thunderbird Turbo Coupe - 120K miles, 99% Rust-Free, 351W/AODE Swap coming soon!
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zip Offline
Member
#2
You can find the inline adapter you need on the later year Mustangs/Rangers with the dual plug 2.3. You can also make one using a Tee for plumbing and some adapters to screw into the sides for the hoses to connect to. Get the right size tee so that the sensor can screw into the top.
Matt
86 TC 5spd:QH/SD,Walbro190,CFI 52#, AFPR,WB,FMIC,3"dp to axle, .63 T3, E6,Stock Longblock.
Shelf:N/A 2.3, Die grinder, Carbide Burrs.
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RC Martin Offline
Posting Freak
#3
The ECT is a resistive thermal device (RTD), so polarity doesn't matter.

Here's a pic I stole showing how someone else did the sender for a temp gauge, I'd imagine you could do the same thing. Not sure where you'll want to do it though in order to get the best temperature reference. http://img10.imageshack.us/img10/1703/dec30241.jpg
Thunderbird Turbo Coupe, Bright Canyon Red TuTone, Desert Tan Interior; 1 of 7 in this combo in 1984 according to Marti.  1 of 13,361 TCs in 84.
   Rebuilt, 3-Angle Valve Job, SYB37 "OE/Small" Slider Cam
   Full 3" Stinger Exhaust to Flowmaster 40, Gnari FMIC/Recirc/BPV, MBC @ 18psi, RF-E6 Manifold, Remote-Mount TFI, PC1 and Flowed 35# Injectors, Inline Walboro 255HP, Kirban AFPR
   Rebuilt Suspension -- KYB & Energy Suspension
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Jeff K Offline
Administrator
#4
^^^^^ I dont think its an RTD. RTDs have a positive temp coefficient of resistance (resistance goes up as temp goes up) and a linear transfer function. The ECT, ACT, and VAT are NTC (negative temp coefficient = resistance drops as them goes up) devices with a non linear transfer function. Some NTC devices are polarity sensitive.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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RC Martin Offline
Posting Freak
#5
Ah, I see. All I knew of was RTD vs. thermocouple. If it mattered why would Ford be putting identical wire leads on new ECTs? I wondered the same thing when I put on a new ETC a couple years ago.
Thunderbird Turbo Coupe, Bright Canyon Red TuTone, Desert Tan Interior; 1 of 7 in this combo in 1984 according to Marti.  1 of 13,361 TCs in 84.
   Rebuilt, 3-Angle Valve Job, SYB37 "OE/Small" Slider Cam
   Full 3" Stinger Exhaust to Flowmaster 40, Gnari FMIC/Recirc/BPV, MBC @ 18psi, RF-E6 Manifold, Remote-Mount TFI, PC1 and Flowed 35# Injectors, Inline Walboro 255HP, Kirban AFPR
   Rebuilt Suspension -- KYB & Energy Suspension
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TurboE Offline
Posting Freak
#6
As Jeff mentioned, here are the actual resistance/temp values. Needed this when I was troubleshooting an overheating issue...

http://natomessageboard.com/uploads/0000...ensors.jpg
-88 TC Black
5spd, Precision SC50 T3/T4, QH/SD Tune, Gillis, AFPR, 255FP, WB O2, K&N, Ported E6, 3" DP, ATR 2.5" Duals, 3:73 Rear, Konis, Eibachs, 18" Voxx Wheels, X Drilled Rotors.
-06 G35 Coupe Diamond Graphite
-97 Pathfinder
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TCLover82 Offline
Member
#7
So, we all pretty much agree that it doesn't matter what wire goes to where on the new ECT?

That tee piece is exactly what I was looking for. Does anyone know what the exact size of the hole that the sensor threads into is?
'88 Thunderbird Turbo Coupe - 120K miles, 99% Rust-Free, 351W/AODE Swap coming soon!
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84TBirdTurbo42 Offline
Senior Member
#8
they put the same white color because the pigtail can be used on multiple vehicle lines and wiring colors vary.
Chris Perry
1984 Ford Thunderbird Turbo Coupe. Dead, NY rot killed her
1986 Thunderbird shell, swapping parts from the 84.
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Dan S Offline
Administrator
#9
If your TC is, "Mostly stock, and still running great", the original connector for the ECT will give you a clue as to which wire goes where. The connector will only fit the ECT one way!

Also, why would you want to relocate the sensor? This used to be a common practice on carbed engines to allow the fuel mixture to enter the cylinder at a cooler temp, allowing a denser mixture for more power. The only thing running through a TC intake is air, the fuel is injected right into the intake port of the head. Others have changed ECT location when using a "Stand Alone ECU", but if you are still running a stock EEC-IV, it's calibrated for the temp at the stock ECT location.
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
http://natomessageboard.com/ubbthreads.p...5#comments
1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
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TCLover82 Offline
Member
#10
The original ECT connector is not the same as the replacement ECT's connector. Neither one would fit the other, and the wire colors are not the same. That is the point of this thread.

The point of relocating the ECT is because I installed a gasket to block off the coolant flow into the upper intake, for a cooler air charge. People over on TurboFord have done this before, and it does reduce the temp of the air passing through the lower intake.

So, no one here knows what wire goes to where on the new ECT harness? Did everyone here just wire randomly and hope, without actually testing resistances to see if it worked afterward? I can't be the first one to do this....
'88 Thunderbird Turbo Coupe - 120K miles, 99% Rust-Free, 351W/AODE Swap coming soon!
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