How to disable coils when cranking?
 

Hi,

Just changing my plugs on 2004 5.4 3V and now that the plugs are all out successfully with none breaking, I was thinking it would be nice to crank the engine a bit without plugs to help dry/push out any carb cleaner/penetrating fluid that ended up inside the cylinders. I wicked up most of the fluid before the last couple turns of the plugs but I'd prefer knowing there's minimal left in the cylinders as Cats are expensive.

I have the fuel rail/injectors removed (as I'm sending them for cleaning/flow testing) as well as the COP's removed. Throttle body is also currently removed.

I can obviously diconnect the harness below the drivers door to disable fuel injection or bump the inertia switch.

Keeping in mind my injectors and COPs are removed with just the individual harnesses sitting loose; is there a fuse or relay that I can simply yank that would disable the ignition completely so that I can crank the engine without any risk to anything electrical?

Thanks!

Tim

completely unnecessary

if your coils are disconnected you dont have to do anything else

Agree. That was a lot of work that didn;t need to be done. Spray the lube out with a spray gun, and go on driving it. It's not gonna hurt your cats...

If the coil packs are unplugged, can this cause them to "burn up"? Some electronic ignition type systems (not sure if the "coil over plug" units fall into this catagory) can be damaged or killed if they are not under load.