I pulled a set of old plugs out of my engine and the part number is BCPR7ES. It also has 11 written below this part number. Are these right plugs? If so, what should the part number be when using NGK platinums? What should the heat range be? What should the plugs be gapped to, .044'' ?

 

Stock ITR spark plugs: NGK PFR6G-11

From the part number you can tell two things: the heat range and gap

Heat range: 6
Gap: 1.1mm

 

PFR6G-11

zerosearch ownz j00.

gap is on the sticker under j00r hood.

 

Thanks for info Hybrid ctr, but it raised another question.

My mechanic told me that heat range number is that last number, PFR6G-11 means heat range 11. Since you are saying 11 stands for gap, the ones that I had on the car were 8. Could this be causing any problems?

When I drive it for the first time in a day, I have no problems. As soon as I shut it off then on again, it stalls in a low power range.

 

Well you can always regap them. I'm not sure about the effects of a smaller/bigger gap, but that might have something to do with it.

Can someone please explain the effects of different size gaps?

TIA

 

I assume a larger gap would result in a more complete efficient burn.

Correct me if I'm wrong

 

A larger gap wont necesarely create better combustion since it would require more current to create a spark. But then again, it all depends on the ignition setup. The problem might lie in the ignition system.

 

use NGK Iridium plugs the number is BKR6EIX-11

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondaboyB16 &raquo;</TD></TR><TR><TD CLASS="quote">use NGK Iridium plugs the number is BKR6EIX-11 </TD></TR></TABLE>

Or even better: IFR6E-11

http://sparkplugs.com/results_...67850