ArmandoGX

Hey guys. I was stopped at a red light the other night and felt the GX start to shake and jerk. CEL and 4LO light started to flash. Drove home turned off car and tried to look for something wrong but nothing. So i took the car to the Lexus dealer since it was still under warranty and turned out to be ignition coil #2 that needed to be replaced. Wondering if it's happened to anyone else with a 460?

Acrad

ArmandoGX

2011 with 88k miles kinda low for that to happen. Maybe just faulty from the factory?

Dennismt

Acrad

Probably cheaper OEM but stock around $75

PN: 9091902256

Looks like it is basically used on all Lexus/Toyota models.

Romanova

Denso is the OEM supplier.

Romanova

Be very cautious when removing the COP plug. They can be pretty tight. If you pinch the tab and pull, you may end up pulling the wires out of the terminal. This is very common on the LS430. Your best bet is to use a pair of needle nose pliers to squeeze the tab and pull gently. If you pull straight up, they come right off. Good luck.

Acrad

Good tip. I am a long ways from doing this but will file this one away.

Romanova

I just did the plugs on my LS430 and found them to be a lot harder than when I did my GX460 last year. Here is a picture I took for the LS430 spark plug thread. I would just make sure you use quality pliers that really grab and grip. These are Snap On Talon Grip. Doesn't take much pressure or force. The COP plugs are short enough were you can't get them mixed up at all.

WRD4chano

what is the recommended interval to change the coils?
the denso coil , would they be good for another 100K
i brought up having my belt changed to my mechanic and he recommended to also change plugs and coils..
im at 90K

ROSCOGX470

Wow, I’m curious to hear comments on this. I never thought of routinely changing coil packs, just thought you replaced them when/if they failed. Maybe the plugs but I’m at 104k and I never considered either. I’ll be watching for a response.

Acrad

I've never had one fail on me. Most of my vehicles since the late 90s having similar setup or at least a coil to each cylinder bank.

WRD4chano

just asked car care nut and he said when they fail as they are not a maintenance item.

ROSCOGX470

Good to know thanks. I suppose plugs would be a maintenance item especially at 100k miles. I just had my ECU replaced and I swear my truck runs better and has a much quieter cold start up than before when it sounded like a jet plane on start up. If plugs are recommended is there a brand recommendation or OEM?

ROSCOGX470

Went on RockAuto.com and there was 24 different spark plugs to pick from, from reg copper to platinum to iridium. I know OE is iridium so is Denso the supplier?