Help, throttle override by the ECU (not due to riding the brakes)

SPOHN

Wow that's a pretty amazing story. Who would of thunk it? So your not going to trade in the car now? LOL.

How did you figure it out though?

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cossie1600

Skills....Just kidding, it was pure dumb luck.

I spent two hours Saturday night driving around town to gather some datalogs. Using the OBDII logger, I was able to see that my engine actually wasn't misfiring. It was actually triggering the brake override safety system (the same reason why people can't do standing burnouts). We drove around at different times and we honestly couldn't figure it out. I then went to an autox hoping to break the car, of course the car drove fine and performed well as I didn't use blinkers on the course. As I was driving home, I noticed my cruise control would cancel on its own again even though I had readjusted my brake pedal switches. I kept using it hoping to catch a pattern on when it cancels. That's when I realized the cruise control would kick off whenever I use the blinkers. I then remember the trailer light is put together with a kit that you have to tab into the brake light and turn signal light. Since trailers don't have a separate brake/turn signal light, I realized it must be that triggering the brake override. I drove around for another 30 minutes and confirmed it was indeed the case (I use my blinkers when I turn, hence all the hesitation exiting the turn). This morning I cut the wire for the right turn signal, sure enough I can now use my right blinker and get full power again. I still can't get the car to stop hesitating on left turn as the trailer light box is behind the bumper, I have to remove it if I want to fix it for good. I was really angry about the car as my old Mercedes and Corvette had electrical problems, thank god the electrical bugs haven't moved to Japanese cars yet. So sorry Nissan for accusing you for getting the electrical bug, still, your dealership sucks as my car now crab walks on the highway thanks to them not aligning my car after a new gas tank.

The cars I want haven't gotten cheap enough for me to buy yet, so I will probably keep the Z now I know that there are no factory made electrical issues.

ChrisSlicks

You can fix your wiring by adding a couple of high-current diodes to the trailer wiring harness, need to prevent the blinker voltage feeding backwards into the brake light and vice verse.

I still find it weird the way Nissan wired the brake kill circuit slaved off the brake lights themselves, but I guess it makes sense in a weird way.

BTW I told you it was the kill switch, just didn't think about it from that end of the car.

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