Hello all, Im at the end of my rope here with this problem and am hoping that someone could lead me in the right direction. The whole thing started when i changed my valve cover gaskets. While I was in there I figured I would change the plugs and wires also. I bought Denso Irridium plugs and I believe it was beckley Arnley wires from Advanced auto parts. While changing the wires the two wire clips broke while unbloting it. I put the car back together and when I started it I saw a wire was arching. I figured it was because of the two clips so I bought two clips from lexus and put it in. The problem slowed down but didnt stop and got progressively worse. I then opened it back up and saw that a clip that went on to one of the coilpacks was looking very brittle and barely holding on so I bought new clips from Lexus and installed them. Still the arch. Today I opened it back up again and looked everything over and the only thing I could think of is the aftermarket wires could be bad or one of the coilpacks are bad. Feel free to chime in. I feel at this point if I take the car to a shop that all the work that I have done would have been in vain. I wont let this beat me....HELP

Im not actually seeing the arch becasue the throttle body is covering it but I hear the click and see the voltage drop

 

I now see that the arch is coming from coil pack number one (one closest to you when you open the hood). Does this mean that the coil pack is bad?

 

I would think so.

 

Assuming u got a gs300, change the ignition wires first.

 

I changed them this morning. Is there a way to test the coil packs before I purchase one? It is a 2003 Gs300

 

Ohm them out.

Primary:
COLD: .33-.52
HOT: .42-.61

Secondary:
COLD: 8500-14700
HOT: 10800-17200

 

Wow....thanks