For the past 10-15k miles the Corolla seems to crank about a second longer to start. Battery was changed last year, and it is running NGK IFR5T11 spark plugs (100k on them so far, 120k is recommended).
I've got the spark plug change itch
and my justification for the change is that it will help start the engine faster
.
I'm thinking of trying the Denso Platinum TT (PK16TT) this time and changing at 50-60k. Partly because I'm still sore about paying $15 per plug on the NGK Laser Iridiums years ago (though prices have come down a lot since then). I could also go with the Iridium TT (IK16TT), but I like the idea of changing spark plugs more often: less chance of getting stuck, better if fouling occurs, some say resistance degrades on old plugs.
The TT range has a tip on the ground electrode, which I like as it would make measuring the gap easier. In the case of the Platinum TT, the center electrode tip is Platinum while the ground electrode tip is Titanium. The PK16TT laso has a 0.040 gap compared to 0.044 for the IFR5T11. Though I have to say that the original IFR5A11 I pulled at 97k measure 0.041 with stacked feeler gauges.
Your thoughts please?
I've got the spark plug change itch
I'm thinking of trying the Denso Platinum TT (PK16TT) this time and changing at 50-60k. Partly because I'm still sore about paying $15 per plug on the NGK Laser Iridiums years ago (though prices have come down a lot since then). I could also go with the Iridium TT (IK16TT), but I like the idea of changing spark plugs more often: less chance of getting stuck, better if fouling occurs, some say resistance degrades on old plugs.
The TT range has a tip on the ground electrode, which I like as it would make measuring the gap easier. In the case of the Platinum TT, the center electrode tip is Platinum while the ground electrode tip is Titanium. The PK16TT laso has a 0.040 gap compared to 0.044 for the IFR5T11. Though I have to say that the original IFR5A11 I pulled at 97k measure 0.041 with stacked feeler gauges.
Your thoughts please?