Shutter Problem

[5ky-lin3]

Hey guys just have a question about a shuttering sortof problem that I'm having recently.

To give some background I started putting BP ultimate in my skyline and about 2 months later it started shuttering/misfiring once I boost it abit and go over the 4500rpm mark.. I wasn't sure what was wrong and hoped that it wasnt to serious.. I have now had my full exhaust put on so I know its not a flow problem and am thinking that it must be due to the better fuel that it isnt firing as well? I will have a go at regapping the plugs to .8 and hopefully this will fix it? any suggetsions would be great as to what else it could be..

Cheers..

[defari]

re-gap the plugs - check the coilpacks - how much boost are you running -what other mods?

[R3N3]

Hey guys just have a question about a shuttering sortof problem that I'm having recently.

To give some background I started putting BP ultimate in my skyline and about 2 months later it started shuttering/misfiring once I boost it abit and go over the 4500rpm mark.. I wasn't sure what was wrong and hoped that it wasnt to serious.. I have now had my full exhaust put on so I know its not a flow problem and am thinking that it must be due to the better fuel that it isnt firing as well? I will have a go at regapping the plugs to .8 and hopefully this will fix it? any suggetsions would be great as to what else it could be..

Cheers..

sounds like a coil pack issue. they are prone to getting hairline cracks. you can replace them or repair them. have a search, there's a few threads on how to fix them.

[5ky-lin3]

cool.. If the regap doesnt work ill check the coilpacks and prob just buy new spits... I'm still running stock boost atm 5-7psi and its onle when it goes to that 7psi point... cheers for the help!

[defari]

check for any leaks too.. make sure nothing is loose

[R3N3]

are you still using the stock gauge? if so you might want an aftermarket one i wouldnt be suprised if you were boosting higher than 7psi now you got your exhaust on

[5ky-lin3]

Ive got an in cabin boost gauge and it is still hanging around the stock boost.. and it only started shuttering much before I put the new exhaust on.. Very loud now! haha