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what's this piggy-backing onto my computer?

Old 08-07-12, 01:00 AM
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what's this piggy-backing onto my computer?

it's wired into the b/w wire, g/r wire and solid black. my car is a series 4 turbo. 87.5 I believe. so what does this do?
Old 08-07-12, 01:04 AM
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Fuel Cut Defender.
Old 08-07-12, 01:09 AM
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I'm sure my loom has one that plugs into the pressure sensor too? what's the massive box?

Last edited by ben.farnath; 08-07-12 at 01:15 AM.
Old 08-07-12, 01:13 AM
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^ Odd.

I assume a previous owner had installed these things?
Old 08-07-12, 01:16 AM
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edited last post see above for pick
Old 08-07-12, 01:30 AM
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it was plugged in when I bought it.just sorting some stuff before I put new motor in
Old 08-07-12, 01:44 AM
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DAT WIRING

Old 08-07-12, 01:58 AM
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Looks like one of those ebay fuel savings scams. What's inside the box? Is it just a resistor?
Old 08-07-12, 02:00 AM
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I know right! see why I'm sorting stuff out. so many hori wiring efforts on this car.
Old 08-07-12, 02:01 AM
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Originally Posted by mastawyrm
Looks like one of those ebay fuel savings scams. What's inside the box? Is it just a resistor?
I'll pull it open in an hour gonna have dinner then have a look. honestly never looked before

just thought id add rotary + fuel savings

Last edited by ben.farnath; 08-07-12 at 02:04 AM.
Old 08-07-12, 02:09 AM
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Hey I got 25mpg highway coming from seattle to portland lol
1.3L fuel savings!
Old 08-07-12, 03:25 AM
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this what's inside the big box sorry crap pic
Old 08-07-12, 02:26 PM
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Originally Posted by ben.farnath
this what's inside the big box sorry crap pic
lol yup, ebay junk. trash it. or resell it on ebay
Old 08-07-12, 03:10 PM
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The only GREEN/RED wire on a series four ECU is the input wire from the TPS.

BLACK/WHITE is just the power wire that powers the ECU and in this case also your 'device'.

Black is gnd for your device.

No idea what it does in life. I assume modifying the TPS input signal to the ECU for unknown reasons.
Old 08-08-12, 01:25 AM
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Originally Posted by HAILERS2
The only GREEN/RED wire on a series four ECU is the input wire from the TPS.

BLACK/WHITE is just the power wire that powers the ECU and in this case also your 'device'.

Black is gnd for your device.

No idea what it does in life. I assume modifying the TPS input signal to the ECU for unknown reasons.
intriguing...hmmm
Old 08-08-12, 04:15 AM
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Originally Posted by HAILERS2
The only GREEN/RED wire on a series four ECU is the input wire from the TPS.

BLACK/WHITE is just the power wire that powers the ECU and in this case also your 'device'.

Black is gnd for your device.

No idea what it does in life. I assume modifying the TPS input signal to the ECU for unknown reasons.
I should note there are I think two wires from this device not wired to anything(will check tomorrow)

possibly runs a shift light? previous owner had removed some stuff before I picked up the car. I never saw it all in one piece
Old 08-08-12, 04:56 PM
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Coulda been some type antiflood device for a series four car.

Series five and RTEK2.0 accomplish antifllood by the ECU seeing a TPS at full throttle which in turn causes the series five ECU to cut the pulse to the fuel injectors.

So your guy might have had this device see a TPS at full range (foot to the floor) and this in turn either cut the power to the fuel pump or some relay that was tied to the primary injectors. Something like that. There's easier ways to cut fuel to the injectors to prevent flooding or clear a flood.
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