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mat277

By mat277,
in R Series (R30, R31, R32, R33, R34)

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PM-R33 Grand Master

PM-R33

Posted
Posted

Your problem is called "missfiring". If you do a search on these forums (or even on Google) you will get a better understanding of what it is and how to solve it.

It could be as simple as needing new/lower gap spark plugs or replacement coilpacks.

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mat277 Apprentice

mat277

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Posted
Your problem is called "missfiring". If you do a search on these forums (or even on Google) you will get a better understanding of what it is and how to solve it.

It could be as simple as needing new/lower gap spark plugs or replacement coilpacks.

thank you i will have a look

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Shazza24 Proficient

Shazza24

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Posted

It is also luck of the draw if you have std ECU as sometimes putting up boost will result in a loss of power, which happened with mine. Yes this was proven to me on a Dyno, and you may not end up a clean power curve especially in higher RPM's (R&R).

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Birds Grand Master

Birds

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Posted

If it is perfectly fine at 7psi then it's not a misfire, I very much doubt it anyway. You're hitting R&R - some ECUs don't like more than factory boost. Only way around this is to get an aftermarket or piggyback ECU and tune the car for the higher boost. Do some supporting mods for it too.

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PM-R33 Grand Master

PM-R33

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Posted

Nah it will be missfiring if he is saying its coughing and spluttering, mine was the same when it was stock. Was fine on stock boost, as soon as we put it up to 10psi it kept missing and had to go to .8 plugs with the factory coil packs which were dying.

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mad082 Grand Master

mad082

Posted
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phil is right. it will be a missfire caused by a weak spark. once you wind the boost up the spark can't ignite the fuel due to it being weak. start by pulling out the plugs and checking the gap on them. if it is 1.1mm then gap them down to 0.8mm (or put a new set of copper plugs in pre-gapped at 0.8mm) and see if that fixes the problem. if it makes it better but doesn't fix the problem then you will need a new set of coils.

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mat277 Apprentice

mat277

Posted
  • Author
Posted
It is also luck of the draw if you have std ECU as sometimes putting up boost will result in a loss of power, which happened with mine. Yes this was proven to me on a Dyno, and you may not end up a clean power curve especially in higher RPM's (R&R).

Thanks heaps for that, ive got a few more things to try but i will put that on the list if all else fails.

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Shazza24 Proficient

Shazza24

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That's fine, but yea try what mad082, PM-R33 and lachlanw said to try. After all they probably have wayyyyyyyy more knowledge/experience than me. BTW search function is pretty handy as most topics have already been covered.

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