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About TomoHawk

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  • Member ID: 1411

  • Title: 1978 280Z (stock)

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TomoHawk last won the day on March 13 2016

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  • Map Location
    NorthCoast, Ohio
  • Occupation
    scientist/chemist/computer prog/ I.T. Instructor

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  • About my Cars
    Mostly stock and original.<br />
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    1972 Ford Escort RS 2000 (sold to collector)<br />
    1976 Mustang II fastback ( V-6, gave to cousin)

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  1. Is that tight? IIRC, the brown one is for the headlamps, so you want to make sure that is the correct size. It looks a bit thin.
  2. The only way(s) to see if it's sticking and why is to remover the AFM and look inside, or take the cover off the side.
  3. It looks like you could only make changes to how the L-Jet ECU works if you had the original Bosch circuit diagrams and operation flowchart. But at least you can fool around with small changes in the coolant sensor.
  4. If you are interested in a less electronic way to tune the fuel injection, Autospeed.com has some good technical articles you read and try: One uses an accelerometer in stead of the S-O-P method. BTW- the accelerometer is also useful for determining shift points. https://www.autospeed.com
  5. You must be thinking of old computer peripheral or I/O adapter cards, that use the microswitches to set up the port settings, card address, etc.
  6. You can get a cryo-freeze spray for electronics, but I don't know who sells that now.
  7. Well... there is that one big integrated circuit in a metal can which does all the complicated stuff. When I had computer 101, we learned that a computer had a CPU, short-term memory (RAM), long-term memory (hard/floppy drive) and can start & stop programs at will until you turned it off. Micrprocessors in cars are similar because they have a CPU and memory (RAM and flash memory) ( think of the Arduino things) and only operate one kind or system or devices in a vehicle (engine, transmission, electrical (lights/security/heat/windows) entertainment, etc. Each begins running a single, but very sophisticated, program when you turn on the main power, and runs it until the power is turned off.
  8. If you want to measure temperature, you use a temperature sensor or thermometer, and read the value directly, the same for pH (of a water or liquid) to directly measure pH., a pressure sensor or gauge to directly measure pressure, etc., but there is nothing like a sensor that directly measures the air-to-fuel ratio in the cylinder. They use the oxygen sensor and presume that if there is no oxygen in the exhaust gas, it must mean a 14.7 air/fuel mixture. So you could calibrate the ECU to any oxygen value and make it mean 14.7, then complain the engine runs badly!
  9. That's strange. Since the coolant is cold, the mixture ought to be a bit rich. Please explain how you can get a lean condition for a cold engine, unless it was stopped in a warm state, then retarted before it could cool.
  10. I still don't understand how you can tell the exact air-to-fuel mixture going into the cylinders by measuring the oxygen in the exhaust gas in the exhaust pipe. There is no such thing as a sensor that measures the air-to-fuel ratio directly so you can show it on a guage, so you are making a lot of big presumptions, as well as presuming the engine is in perfect working order, a complete combustion, etc. You can measure the amount of air using the density sensor and air speed sensors, and the amount of fuel (approximately) using the fuel pressure and injector timing, then making some calculations to calculate the air/fuel ratio.
  11. I had an old AFM that had a dead sopt in the resistive track. there was no way to fix it or revive it. Another AFM fixed that.
  12. S30s don't have computers in them, unlessz you install something. Neither to modern vehicles; hey have micrcontrollers The Bosh L-Ject ECU is just a circuit board with transistors, integrated cir cuits, and other discreet electronics.
  13. The only place you can accurately measure the air-to-fuel ratio of what goes into the cylinders is to put a sensor into the intake manifold. Even more precisely, is to have a sensor near each intake port. Having an o-2 sensor (whatever "0-2" means) only measures o-2 in that particular spot.
  14. I stand by my original statement that there is npo such thing as a sensor that measures the air-to-fuel ratio, in the intake manifold.
  15. Is the AFM even connected? The connection is underneath..It might need to be cleaned with DEOXIT, not WD-40. Make sure the throttle linkage is connected and functioning as well. You can operate the throttle by hand.
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