LEDs tapped into injector wires to monitor fire rate?
01-15-2002, 02:26 AM
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
LEDs tapped into injector wires to monitor fire rate?
This isn't exactly eprom but it has to do with GM ecm injector drivers. Is it possible to install 2 switching transistors inline of the TBI injector wires to monitor injector behavior from inside.
I was thinking about the transistors because I remember somebody telling me that the LEDs have a voltage drop. Anybody see any problems with my plans? Any recommendations for what kind of transistors would work best.
I was thinking about the transistors because I remember somebody telling me that the LEDs have a voltage drop. Anybody see any problems with my plans? Any recommendations for what kind of transistors would work best.
01-15-2002, 08:32 AM
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Car: 1985 Trans Am/WS6
Engine: 5.0 TPI
Transmission: Auto
Axle/Gears: 3.27
LED voltage drop is around 1.5 volts. Current draw is as high as 30mA. Use a dropping resistor. Wire resistor (I suggest 470 ohm) and LED in series and connect to wire leading to solenoid. LEDs will probably just flicker.
Last edited by Greg '85 T/A; 01-15-2002 at 08:45 AM.
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