@agent008 is part of the way there, but you also have to test the wires for short to ground, short to +12V and short to other wires. I have usually been able to visually inspect the wiring, looking for damage to it or to connectors.When I saw the mouse nest, I was actually happy - figuring I found the issue. However, even though there was a lot of debris on top of the tank, the wires looked to be untouched - no chewing anywhere between where the wire is not running through the interior of the car and the sending unit and my very (un)scientific test of wiggling the wires around in that area didn't seem to affect the car at all - How can I actually test that wiring and the sending unit?
Normally, as @sahein stated, a bad coil will result in a misfire code, and that code is usually specific to a cylinder. Finding the bad component (coil, plug, injector, etc) generally involves switching components between cylinders and hoping the misfire switches to one of those cylinders. You don't have a misfire code, so that technique is not available to you.Also, any advice on how to "test" the coils? I can pull the plugs easily enough and check them, though that would really be a head scratcher to have a bad plug and/or coil causing me a complete loss of power to the ignition system? Honestly, even a short on the fuel pump sending unit causing a loss of power on the ignition side would seem odd to me.
Yes, I can post the ECM pinout tonight.Does anyone have a pinout diagram for the PCM connectors for a 2007 sky base?