Measuring engine on vs car on with engine off

[Weather Spotter]

I have been thinking that I'd like to have a way of measuring engine hours. Because it odometers not a real good reading when I spend a large fraction of my time engine off coasting.

It would be useful to be able to track hours not miles so I know how much wear is on the engine and its components. It would also make a good number to track how much pulse and glide is on each tank.

I was thinking of measuring car on hours and engine on (rpm>0). I have a very limited idea on how to do this. The car on hour meter is straight forward, hooks to a power source that is only on with the car, say the radio wire that comes on with the car? The engine one is past where I can figure it out. Any help?

[jakobnev]

Ignition being on and the oil/alternator warning light being off, should mean that the engine is running.

[nbleak21]

Crank/Cam angle Sensor.

[Weather Spotter]

where would I find these wires? Anyone hooked up hour gauges? I have never done it before.

[AndrzejM]

Hi,

You may try some of those mentioned here: Hour Meters, Gauges

And here you can find a discussion regarding the issue: Installing Hour Meter - Source of +12V when engine is running? - Insight Central: Honda Insight Forum

It's quite simple you need two hour meters one hooked up to the ignition to measure whoe time of car running and second one hooked up to oil pressure switch to measure engine's running time. Then you have everything that you want.