[Skylines Little Bro]

just recantly every once and a while, when on the gas my ca18 would miss fire. so i changed the plugs, i put in bosh platnum +4's. at first it was working fine, but after a few hours of driving, it started again and got really bad. it will run fine up and till i hit full boost then it starts to miss frequently.

Any ideas of what it could be, or some where to start looking woulkd be great help. I have access too a mechanics shop so any tool i may need i will have.

ohh ya i this is in my 89 silvia

 

[Skylines Little Bro]

could also be a faulty CAS. This happens a bit on CA's

Whats the Cas?

 

[Skylines Little Bro]

Crank Angle Sensor I believe.

ok so could it maybe be dirty and need cleaning, or could it be dead