Can someone tell me which relay or fuse to disable so i can crank the engine over with out it starting. I want to test compression in a cylinder.

I have one cylinder that the threads on the spark plug are oily. I think its causing a misfire at idle. The plug doesn't really look fouled though just oily threads. Its number 8. I also notice the engine has a funny knocking noise when it misfires at an idle but only if its in gear. If i give it any throttle the knock goes away??? odd huh?

 

Pull the fuel pump fuse under the hood. I also pull the ign fuse but Im ****.

 

Thanks...i think the knock i hear is the cylinder unloaded when the plug misfires.

 

Pulling both injectors fuses disables everything you need to do a comp test.

 

Pulling all of your plugs out makes it easier on your starter and give more consistent results.