I had a few moments to experiment with this idea tonight and it works well... I'd post a pic but all you would see is a red light glowing in my fusebox as its well dark outside.
The idea is to get a simple visual indication that the fuel pump relay is activated. This verifies the ECU is happy that its getting rpm pulses from the G28 sensor at a suitable rate to activate the relay AND also that the relay contacts have energised for the pump and injectors. Its useless 99% of the time, when car runs well, but priceless when you have a no-start condition.
The tweak is the simple addition of an LED inside the relay and a small hole in the relay case to see the light when you have the lid off the fusebox. Its a simple enough mod for anyone with the knowhow and license to drive a soldering iron (and a drill), but if there is interest for me doing those for a small charge I could be persuaded.
The LED only lights when the ECU has activated the fuel pump... with the ignition on alone, the LED stays off. Pretty simple logic.
Paul
The idea is to get a simple visual indication that the fuel pump relay is activated. This verifies the ECU is happy that its getting rpm pulses from the G28 sensor at a suitable rate to activate the relay AND also that the relay contacts have energised for the pump and injectors. Its useless 99% of the time, when car runs well, but priceless when you have a no-start condition.
The tweak is the simple addition of an LED inside the relay and a small hole in the relay case to see the light when you have the lid off the fusebox. Its a simple enough mod for anyone with the knowhow and license to drive a soldering iron (and a drill), but if there is interest for me doing those for a small charge I could be persuaded.
The LED only lights when the ECU has activated the fuel pump... with the ignition on alone, the LED stays off. Pretty simple logic.
Paul
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