My only niggle, does the 1zz and 2zz share the same pack?

My gut says yes from a manufacturing point of view. But IDK.

I just searched for '1ZZ denso coil pack' and loads came up.

Then I realised it was 2ZZ coil packs we were looking for.  So I tried again.  Found quite a few.... not cheap though!!

Despite some issues I had with autodoc, I will say, their website is handy for cross reffing part numbers.

Same part different ref across manufactures and usage.

To illustrate, I have an MR2, I have also had a gen 2 prius and an RX400h. Guess what, they all used the same maf. So is the coil pack more widely available than at first appears. IDK but just a thought.

Perhaps go east if not west.
https://www.amayama.com/en

Quote from: H2zzMRA on November 19, 2025, 10:33The coil pack is failing/ misfiring a lot, could a clean/ sort the oil flooded plug well out cute that?
Or is the coil likely to be dead. Never throws a misfire code oddly?
Any ideas

Apologies, I should have been clearer. Replace the dodgy one yes. I meant, was is ness to replace all as you were suggesting.

The coil will be defective. You can wrap it with tape and clean the oil. This may initially reduce the symptom. The coils break due to the hot-cold cycle. If the coil is cracked, the crack will widen as the engine temperature increases, resulting in misfires. This explains why your car runs well when cold, but misfires when warm. Have you checked Rockauto? It's a US trading platform that accesses various warehouses throughout the US. You can get all the common wear parts there. They have brand-name products like Denso, but also cheap junk. I've ordered from them at least 50 times (I live in Germany). The parts arrive here within 3-5 days. Take a look.

Quote from: Ardent on November 18, 2025, 20:52The rocker cover gasket i replaced, was from Mr T, no more expensive (£15) than anywhere else at the time.

I know I'm referring to the 1zz again, but have been reported issues with unknown brand blue coloured gaskets. Stick with oem


Plugs are comparatively cheap. So not a bad thing. But with a clean etc, do you need to replace all the coil packs?
Good practice? Definitely.  Absolutely required? Hmmm maybe not.

The coil pack is failing/ misfiring a lot, could a clean/ sort the oil flooded plug well out cute that?
Or is the coil likely to be dead. Never throws a misfire code oddly?
Any ideas

The rocker cover gasket i replaced, was from Mr T, no more expensive (£15) than anywhere else at the time.

I know I'm referring to the 1zz again, but have been reported issues with unknown brand blue coloured gaskets. Stick with oem


Plugs are comparatively cheap. So not a bad thing. But with a clean etc, do you need to replace all the coil packs?
Good practice? Definitely.  Absolutely required? Hmmm maybe not.

I'd think twice before adjusting iridium plugs. Can you not get bkr7eix-11 with the correct gap? However, is IFR6T-11 not the recommended plug for 2ZZ or if you want a cooler plug then IFR7G-11KS? I run IFR7G-11KS but my car has a supercharger so they're recommended.
On the coil packs, I've used NGK on other cars with no issue whatsoever. I suspect Denso have stopped making them (driving price up in recent years) and NGK probably picked up where Denso left off.

The plugs you state are Iridium...I don't think the gap is supposed to be altered.  A 2zz compressor runs happily on copper plugs.....

The chances of you getting someone with a 2zz car who's used NGK coilpacks is pretty slim.
They are a recognised top brand, - it'll work.