Quote:
Originally Posted by cabmando
You can jumper the fuel pump to make sure it's working. You'll hear it humming when you put the jumper in. No hum, no fuel pump.
As Glen mentioned, it's a two part relay so you could have spark and power to the injectors but no fuel to the injectors if the fuel pump side isn't working.
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I'm trying to rule out the reference sensor and speed sensor as the culprits, because I really don't want to have to try and replace those with the engine in the car :-( I'll try the fuel pump debug by jumpering/bypassing the relay, but I'm not sure my original question is answered: will the DME generate spark and fuel pulses if either one of those sensors is bad?
I know it shuts off the fuel pump if the reference sensor drops below 200 RPM, or if the reference sensor just fails. Does it also cause the spark/fuel to get shut down, or will it generate those pulses even if the sensor is dead?
Seems like it would need the sensors to get the timing of the fuel/spark pulses correct so my thought was if I'm seeing pulses then that means the sensors are OK and it's a fuel problem or a bad relay?
As a preventative measure, I've already purchases a Focus9 solid state relay...
Thanks,
Bill