How does fuel injection computer control ignition timing?
How does fuel injection computer control ignition timing?
It’s with the Bypass Signal that the computer starts to retard and advance ignition timing with the IC Signal. So, then above 400 RPM (any RPM above this and the ECM considers the engine as having started) the fuel injection computer starts to control the ignition timing.
How does the GM distributor mounted ignition module work?
OK, once the fuel injection computer receives the Distributor Reference Hi Signal, it starts activating the fuel injectors and above 400 RPM, starts to send a 5 Volt Bypass Signal to the ignition control module. It’s with the Bypass Signal that the computer starts to retard and advance ignition timing with the IC Signal.
What kind of signal does a GM injector pulse have?
Purple/white wire with key on had barely any signal at all. Wires to the injectors have 12v with key on. I have fuel at the rear of the tbi but not sure of the pressure?
Which is CKP signal does the GM 3.8L ignition module use?
One CKP sensor is called the 3X CKP Sensor and the signal it creates is called the Sync 3X CKP Signal and the other one is called the 18X CKP and its signal the Crank 18X CKP Signal. As stated before, both of these signals are critical for the ignition control module to start the car (to start sparking the ignition coils).
It’s with the Bypass Signal that the computer starts to retard and advance ignition timing with the IC Signal. So, then above 400 RPM (any RPM above this and the ECM considers the engine as having started) the fuel injection computer starts to control the ignition timing.
OK, once the fuel injection computer receives the Distributor Reference Hi Signal, it starts activating the fuel injectors and above 400 RPM, starts to send a 5 Volt Bypass Signal to the ignition control module. It’s with the Bypass Signal that the computer starts to retard and advance ignition timing with the IC Signal.
How does the ignition module control spark timing?
Under 400 RPM’s, the ignition control module controls spark timing without the help of the fuel injection computer. Once the engine starts and the RPM’s are over 400 RPM’s, the fuel injection computer takes over and starts controlling Ignition Timing (albeit thru’ the ignition module).
What was the ignition module on a 1993 GMC k1500?
1993 GMC K1500, K2500, K3500 Pick Up. All of the information you need to diagnose a no-start problem caused by the ignition module, or the ignition coil, or the distributor pickup coil. Wiring diagram. Component pin outs.
