Spark Plugs Options

[phokur]

My Celica is starting to sputter every once in awhile while in 5th gear at about 3grand or so. I'm pretty sure it's plugs. Can anybody recommend any plugs?

[alltracman78]

Copper/Platinum/Iridium will all work good.
Even the single ground vs the twin ground, as long as you have a dist.
Engines with DIS are much more sensitive to changes in plugs due to their ability to feedback to the ECU. So sometimes on those engines not using the actual platinum twin ground CAN [not guaranteed] cause a CEL.


IMO, I like coppers best IF I can easily get at them to change. They will conduct electricity better than platinum/iridium. I run NGK V powers in my truck.
But my Alltrac obviously is a bit harder to acess the plugs.
And, it tends to eat them, PLUS the fat copper tip tends to easily foul out.
So in that case I just use the Iridiums.

Platinum/iridium were developed so the plugs would last longer. They are harder metals than copper alloys, and so don't wear as fast.

[Negative]

Copper/Platinum/Iridium will all work good.
Even the single ground vs the twin ground, as long as you have a dist.
Engines with DIS are much more sensitive to changes in plugs due to their ability to feedback to the ECU. So sometimes on those engines not using the actual platinum twin ground CAN [not guaranteed] cause a CEL.


IMO, I like coppers best IF I can easily get at them to change. They will conduct electricity better than platinum/iridium. I run NGK V powers in my truck.
But my Alltrac obviously is a bit harder to acess the plugs.
And, it tends to eat them, PLUS the fat copper tip tends to easily foul out.
So in that case I just use the Iridiums.

Platinum/iridium were developed so the plugs would last longer. They are harder metals than copper alloys, and so don't wear as fast.

I've always been told Iridium is no good for Turbo cars [specifically told not to use them on 3S-GTE]. Is this true? Have you had good luck with them I take it?