i need to know what part number for the spark plugs 1 step colder do i need for my 2,4/sc built

thanks!

 

with NGK is 1 number higher, i think stock is 5 so a number 6 is what you want

 

NGK 6509 or LTR6IX-11. Same plug just one is a stock number and one is the part number

 

I've had good luck with the ngk bkr7e's, stock 4644. Or it might be 6e's you need.. been a while haha

 

NGK LFR6A11 (3672)
Autolite XP5263

Both are one step colder. I was using the Autolites and started getting misfires recently. I switched to the NGK and the misfire issue disappeared. The NGKs can also be found with the 3672 stock number and they are a couple bucks cheaper.

 

NGK 6509 one step colder

 

Those are the LSJ plugs and not designed for the 2.2 or 2.4 although you are not the first I have heard about using them

 

I had no luck with the autolites either and am running NGK 6509 plugs, still misfiring. The 3672s are a different reach then stock but they really took the issue away completely?

 

I had a set of Autolites for a year with no issues then I got another set and within a few months they were causing misfires. Tried different gaps too. I was getting misfires almost everytime I drove. Before I started beating on the car again I installed the NGK plugs and I have not had a misfire code since. I gapped the NGK kplugs at .034.

 

I may have to give those plugs a shot. I usually only get misfires at idle but it is so damn annoying especially when I throw the p0300 code almost every day lol

 

Thats what was happening to me and different gaps didn't remedy it so I swapped plugs. They are a few mm shorter, but they still make the connection fine with the coil pack.

 

Yeah different gaps haven't helped me either and I keep being told it's my injectors and that I have to live with it

 

It is annoying...P0420 and P0121 would always pop up for me. My tuner deleted though