Hows it going guys, anyhow just wondering about spark plugs. Recently i changed to the NGK ZFR6F-11 and i've been having fuel problems, just wondering what plugs are the best for fuel economy in cold climates (canada toronto baby ) and what ones for the d15b since its a jap motor. thanks alot guys

 

How do you know its from the plugs and not something else

 

the wires were just recently replaced, the dizzy runs (it runs, lol so its ok ) and i checked all vacume lines, i dont know what it can be, all i want to know is what sparkplugs best suit the d15b engine

 

In my 93 Civic DX Sedan I have a D15B7 and I run the same ones that you put in your ride. I have no problem w/ them at all.
I think that the 92-95 EX/Si Plugs are cooler but can't remember right off hand. If nothing else most auto retailers shoud be able to reference for a cooler plug if you want.
Might not be the plugs though but could be wrong..

 

if you're not boosted or Hi-Copm NA, use stock plugs. too cold a plug will foul fast and give shitty fuel economy.

 

I run the same as d16z6 plugs.

the motors arent exactly the same,
but they're close enough. both sohc vtec's putting out similar power, with
similar block/head/piston/etc etc..

nothing drastic enuf to warrant using a different kind of plug.
hunt down info on whats good in a z6.
(basically the standard ngk or denso, and go a setup colder if ur running boost).

 

Tad gave you the info a while ago

you shouldnt be, correct plug is <U>ZFR6J-11's</U>, that was on the factory sticker on my D15B motor (in a RHD JDM EG4 )

The D16Z6 is BKR6E-N-11 which are different plugs, these are half a heatrange colder, but not as extended tip. Though having said that they may suit your s/c motor a little better, as you want colder tips with charge to reduce the risk of det, but maybe a full 7 may help further, probably ok if you dont live in colder areas

Shotman,

if yours is N/A with bolt ons go for the ZFR's, mine ran a lot better with the correct plugs, if your looking for iridiums, go IK20's or IK22's correctly gapped

loads more info why here
https://honda-tech.com/zerothread?id=662645
and
https://honda-tech.com/zerothre...96114

dragging up an old post i know, but thought it was worthwhile