I have a 99 acura rl and the injectors are not firing. I checked for power and they are not getting any. What sends power to them that I can check and fix. Thanks.

 

When the ignition is in RUN or START, battery power (+) energize the main relay, allowing the relay contacts to close to supply power (+) to the fuel injectors.

So, essentially, when the ignition is in RUN or START, power (+) should already be on one side of the circuit of the injectors. But, the main relay does not control them. The ECM/PCM control how the injectors operate via the ground (-) side.

 

Issue can be due to a fuse or wiring.

 

I checked all the wiring and pulled every fuse one by one. Im stuck. I was also told that the crank position sensor has something to do with the injectors getting signal to fire. Dont know how true is that. I just need to find the source of the signal soni can try to trace it from where it starys and stops.