Jerking When You Give It R33

[nardo-R33]

Hi guys I just did a serves on the car oils filters an spark plugs when I drive it after felt like is was jerking when you put ur foot down. Could it be the spark plugs cause I put spitfire sparkes in it they have 2 sparking points on them.

Help please

[niZmO_Man]

What were the spark plug gaps? Could also be AFM.

[sonicz]

2 sparking points on them? Horrible spark plugs. Go to autobahn or repco and get some bcpr5es-11 or bcpr6es-11 if your running higher than stock boost and your problems should go away.

[nardo-R33]

Could it be the coil packs cause I put the ones I took out back in and it drove fine for a few day them started today it feels like its missing

[Ben C34]

Dude, give more info on what you did and about the car!

so you changed coil packs which made it good for a few days?

[nardo-R33]

I changed the spark plugs I put spitfire twin sparks but the car sounded like it was missing so I put the other plugs that came with the car back in an it was fine for a few day not missing then its started today. I think it's the coils but not sure wat u guys think ?

[mad082]

what gap were the plugs you put in, and what gap were the ones you took out? if you aren't sure, what part number were the ones you put in?

running plugs with a smaller gap can help with misfiring if your coils are weak, which most are on skylines these days if they are the original ones (given how old they are now). most people run plugs with a gap of 0.8mm to help with misfiring. the stock gap is 1.1mm. so if the plugs you bought have a 11 at the end of the part number then there is a good chance they are 1.1mm gap plugs and are showing that your coils are weak. if your old plugs were only the 0.8mm gap then that would explain why it ran better with them, but if they are old then the gap has probably grown a bit and is up around 0.9 or 1mm.