FT500 SFI / FT500LITE SFI
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Sensors and actuators
Models:
• Fiat: Delphi / NTK (3,3kΩ a 20ºC);
• GM (American): ACDelco: 213-928 / GM: 12146312 (ou
15326386).
One of its pins is connected to the battery negative. The other to the
white #5 wire (standard – can be changed).
12.3 Fuel and oil pressure sensor
FuelTech PS-150/300/1500 is a high precision sensor responsible for
general pressure readings (fuel, oil, boost, exhaust back pressure, etc.)
It can be purchased online at www.fueltech.net or from an authorized
FuelTech dealer (check the website to locate the dealer nearest to you).
FuelTech PS-150/300/1500 sensor below:
- Connection: 1/8” - 27NPT
- Pressure Range: 0 to 150/300/1500psi
- Power Voltage: 5V
- Output Scale: 0.5-4.5V
- Electric Connector: 3-way Metri Pack 150
Pin A: Battery’s Negative
Pin B: 5V supply
Pin C: Output signal
FuelTech part numbers:
5005100020 - 0-150 psi sensor
5005100021 - 0-300 psi sensor
5005100022 - 0-1500 psi sensor
As FT500 is fully configurable, practically any automotive pressure
sensor can be used – if the voltage x pressure table is known, you
can setup through FTManager software.
12.4 Throttle position sensor (TPS)
This sensor is a potentiometer installed on the throttle to inform the
ECU about its position. If needed, it is possible to run the engine
without this sensor, but, it is very important for a fine tuning. When
possible, use the OEM TPS. This ECU is calibrable to any kind 0-5V
TPS sensor. Anyway, FuelTech products are compatible with any 0-5V
TPS sensor, since they have calibration function.
Discovering the TPS pinout
With a multimeter in the range of 20k Ohms, disconnect the from
the FuelTech ECU and let the ignition key off. Check the resistance
between the Green/Red (5V supply) and Black (battery’s negative)
wires. Resistance should not vary when accelerating. If vary, reverse
the wires so that the resistance of the TPS varies only between the
White wire #11 (default TPS input signal) and Green/Red and between
White #11 and Black wires.
The TPS signal voltage should vary according to throttle opening,
with gap bigger then 3V between fully closed and wide open throttle.
12.5 Crank trigger/RPM sensor
To control fuel and ignition, this ECU is able to read magnetic and
Hall Effect sensors.
Distributor
To read RPM signal from a Hall Effect distributor, it should have a sensor
with at least 3 pin and have the same number of reading windows (or
“triggers”) than the engine has number of cylinders.
RPM - red
12V Switched
Negative s Battery
-
+
VW Hall Effect distributor connections
Crank trigger
The crankshaft trigger wheel is responsible for informing the exact
position of the crankshaft to the electronic ignition management
system, in such a way that this system is able to determine the ignition
timing in the engine. The trigger wheel is installed on the crankshaft,
outside or inside the engine block, with a specific alignment. Usually,
the Crankshaft Trigger Wheels placed on the outside of the block are
put in front of the engine, by the front crankshaft pulley, or in the rear
of the engine, by the flywheel. There are many types of Trigger Wheels,
but the compatible ones are mentioned below
60-2:
this is, in general, the most used type of trigger wheel. It is a
wheel with 58 teeth and a gap (fault point) equivalent to two missing
teeth, therefore called “60-2”. This trigger wheel is found in most
Chevrolet (Corsa, Vectra, Omega, etc.), VW (Golf, AP TotalFlex, etc.),
Fiat (Marea, Uno, Palio, etc.), Audi (A3, A4, etc.) and Renault (Clio,
Scènic, etc.) models, among other car makers. Ford Flex models with
Marelli ECU use this type of trigger wheel also.
36-2:
standard in Toyota engines, being 34 teeth and a gap equivalent
to two missing teeth.
36-1:
35 teeth and a gap equivalent to one missing tooth. It can be
found in all Ford vehicle lines, with 4 or 6 cylinders (except the Flex
models with Marelli injection, which use the 60-2 trigger wheel).
12 tooth:
this type is used by AEM’s Engine Position Module (EPM)
distributor. In this case, the cam sensor from the EPM must be used.
This distributor has 24 teeth, but as it rotates half-way for each full
engine RPM, there will only be 12 teeth per RPM. Setup the Ignition with
12 teeth at crank (24 at cam) and the 1st tooth alignment with 60°.
A
B
C
