big mis in R33

[walkoau]

hi guys

i have recently found that there is a misfire in my r33 gts-t at about 6500rpm under load in first gear runing at 6psi

when i run it at 10psi the problem gets worse and does it at about 4000, then 5000 then 6000 rpm.

it feels very similar to when you hit the rev limiter only you feel it the once.

the only mods are k&n pod filter with cai, turbo smart boost controler (swichable) and i have only just put a full 3'' exhaust on this week.

anyone know what this problem could be or any ideas?

[Ant97GTR]

Walkoau,

Mate there are heaps of threads on this topic around this forum....do a search....

Solution to this prob keeps coming back to the spark side of things.......plugs/coil packs etc etc

[G0DF4Th3R]

gap ure plugs to 0.8

[Dsturbd]

Check your plugs and make shore the gaps are correct ..Gap them to 0.8

[walkoau]

yeah the plugs were gap to 0.8 when i put them in about 4 months ago.

[Anquetil]

I get this too. Only happens in 1st when pushing it hard, it jolts 2-3 times forcing a gear change. I thought it may be some sort of Rev/Boost/Fuel Cut... Dunno really? Sparkies you reckon?

[Dsturbd]

Pull them out and check just to be safe.... Could be dodgey plug

[RbHed]

could be a leek in the ic piping

[Guest Robo's]

Do a search man, im sick of repeating myself

[pushead]

Robo's experienced with this try search for safc

[walkoau]

ok Robo ive done the search and what u say about the safc sounds good. but if the fuel dumping is my problem could this be fixed by simply turning the boost down?

how much would it cost me for a safc and a good tune?

i do want to put in an apexi power fc in my car soon, so would i be wasting my time and money buying the safc? also my car is an auto so i dont know if i can use an apexi power fc?????????

[Guest Robo's]

Yes turn down the boost and it will mis less, i hope. so that means you can never run higher boost which defeats the purpose.

SAFC are around $400, tune shouldnt be much, even i can do them, and yes a PFC will fix it as well, but im unsure on the autos.

[eliter33]

i have the exact same prob and so do 2 of my other mates. i am getting mine fixed atm and one of my other mates has just had his done. it has to do with the coil packs being stuffed/cracked. the cover that is over the top of the coil packs in the 33's isnt exactly the best when it comes to ventilation of heat. i am getting bosch coil packs put in. and i run with the cover off in the mean time. the bosch packs don't fit under the factory cover, so they get mounted externally of the cover and are alot cheaper.

[CWest]

got 1 of my coil packs changed today .. a common problem with the line series mine a 34. Cost me 600 bucks cause i got ripped off. Never going there again

[eliter33]

yeah that is heaps man... whew glad it wasnt me umm... i think the whole change over to bosch packs and new igniter will set you back between 500 and 700 depending on who you go to.

[walkoau]

robo

thanks for the info. i turned my boost down to 6 psi and the problem isnt as bad, but it is still there. it missfires at 6500 rpm, just before gear change. if it still does it with the boost down to 6psi this leads me to think it may be something else because its only just started to do it also.(within the last week)

or do you think i should just get a safc.

[Dsturbd]

I would be pulling the plugs out to check them and also check coil packs ... Mine had same problem and plugs were two weeks old replaced them and no more miss

[RbHed]

how do u know ur coils r stuffed ?

[Dsturbd]

You can see them arc out onto the outside of the coil ... Stuffed coil will constantly miss real bad

[LastTemptation]

walkoau have a mechanic look at it, this is a forum were ppl just share there thoughts, sometimes its very good help sometimes not.