Stand alone engine managment and gauges
Thread Starter
Instructor
Joined: Oct 2017
Posts: 161
Likes: 34
Stand alone engine managment and gauges
So is their anyone running a different engine management system and still have factory gauges? I was thinking about running a Holley HP on my 02 ZO6 but would like to have factory gauges working. Not sure if the BCM is tied into the ECM in anyway.
Thanks for ideas and help
Thanks for ideas and help
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
The speedo and tach are driven from the PCM via pulse outputs so maybe Holley supports that. I think it's 4000ppm for the speed. Not sure on the tach signal, but I'd guess it's 4 pulses per revolution or basically a pulse each time a cylinder is fired.
Fuel gauge goes through the PCM with 2 senders in to PCM and the gauge output sent to the cluster over the serial bus so I doubt you can keep it.
I can't recall offhand exactly how the oil pressure or engine temperature operate but I'm pretty sure both sensors go through the PCM as well which means they too are likely communicated to the cluster via the serial bus.
Fuel gauge goes through the PCM with 2 senders in to PCM and the gauge output sent to the cluster over the serial bus so I doubt you can keep it.
I can't recall offhand exactly how the oil pressure or engine temperature operate but I'm pretty sure both sensors go through the PCM as well which means they too are likely communicated to the cluster via the serial bus.
