Competitor9

Hey. Running inlinepro stage1 7psi evans tuned stock hg upgraded cooling system. Hks single 75mm test pipe. I was winding out 2nd gear and the car started popping at 6800 it was already warm i had been driving for like 30 mins and then i tried to reproduce the problem and it happened again same thing around 6800. It felt the same as when you try revving it out when its cold and the vtech doesnt kick in any ideas

iApex

When was the last time you replaced the spark plugs?

Competitor9

About 300 miles ago i actually just changed the plugs and the oil. When evans tuned my car he gave me plugs but advised me to change them asap to the ones i have in now.

s2000Junky

What plugs?

s2kdan05ems

If it's the spark plug gap it to 30 and make sure it's one step colder

RedLineS2k10

Is it misfiring?
My car did it at 4500, but that was a leaky injector. Could be too hott of a plug and/or not gapped properly, ik most people including myself run about .28- on most turbo applications, I run ngk bkr8eix

Competitor9

I bought the plugs like a month ago they were ngk i forget the part number but i ordered them literally 20 seconds after i got done with evans so im sure i got the right plugs but i didnt change the gap. So whatever the gap was thats what i left it. Ill pull them out tomorrow. What should the gap be someone said .30 someone said .28

ScorpioMk

try .30 and if it doesn't misfire then your good. 7psi is pretty low you could probably go bigger too.

s2000Junky

The bigger the gap the better, we are not talking a blow out scenario here. Run the stock gap 0.32-34 range. Bigger gap allows for a more complete combustion at all rpms.

If they are the copper 7173's ...lose them! and get the NGK 2668/BKR8EIX

StocS2k

x2 BKR8EIX