Changed my plugs in my 1J today with stock motor and turbo setup and I used autolite double plat plugs. I gaped them at .32 and I am running 6 psi. Well the car idles smooth as hell and it is breaking up on the top and on full throttle. Well how much are you guys gaping at? I thinking I need to go like .24?

 

Lower your gap until you no longer experience break up. You should also check your coilpacks if you havent for hair line cracks. I have my plugs gapped at .23 before i had them at .28 and .25 so far theyre doing good.

 

Oh ok yeah what boost you running?

 

im on 16psi ca 91 pos octane lol.

 

Oh ok Yeah IDK I will try upping my boost to 10psi and gaping at .24

 

take the rubber boot off the coilpacks also and check for cracks that will cause your car to break up. You can use electrical tape and tape the crap out of them for a temp fix.

 

I am doing that as we speak. I think its the gap tho didn't do it before hand. thank you tho.

 

otherwise, go buy the proper plugs from toyota/lexus and you wont have an issue they are pregapped propperly and with the right temperature variant.
toyota part number 90919-01180-83
theres many google searches on why platinum plugs arent for every car.

Ofcourse they may not be the issue. but my car ran like **** with anything but the above part number. since then ive never boughten anything for the car unless it was OEM

 

OK cool thank you. I was gonna get the NGK's but there like 9.33 a piece and I am running such low boost.

 

why are you at 6psi? your 1jz should be hitting like 11-12 psi. if your at 6, you likely have an intake leak or youve done it on purpose i suppose?

 

LOL no I have it set there lol. I am gonna go up to 10 now tho. Gas is exspensive and those twins spool fast.