Bad Miss At Hi Rpm

[yellow34gtt]

Hi to all,

i need some advice on a problem which by other post sounds quite common in 34's

let me first infom you what i have had done recently to my 34gtt $ 6500.00 later i have my turbo hiflowed with trust internals from GCG, 550 cc injectors, apexi power fc computer,full hks super drager exaust,front mount, dump pipe, runnin 16 psi,walbro 255 lt pump, only just put in thinking this may fix my problem.

ok here is my problem when at hi rpm say 3500 upwards and anything above 10 psi i get pap pap pap sound like a boost cut sound some times it runs good and some times it runs bad, it was tuned in brisbane and all went fine untill i return home I'm about 900 mtrs above sea level a bit colder temp as per say.

if anybody can help me with a solution or advice my mechainc says it now could be coil packs and recomends split fire items at a Cool $ 1000.00

any help would be great thanks heaps ...... :

[Craved]

could be a coil pack issue.. i have the same thing happening

try dropping your spark plug gap to like 0.6mm and see if it helps

[yellow34gtt]

could be a coil pack issue.. i have the same thing happening

try dropping your spark plug gap to like 0.6mm and see if it helps

mmm good point, i will have to try that thanks...

it is set at 0.8 at the moment from 1.1

it is a pain in the butt hey...

[Craved]

yeah.. im running 0.6 and still having issues .. splitfires are about to go in..

hope it fixes it for you

[Bass Junky]

Yep.

It's coil packs.

I wouldn't go much further than 0.8mm gap though.

Don't buy the Splitfires at $1000 though.

You should be able to get them for about $600 odd from Greenline, Nengun or Kudos Motorsport (group buy specialists who I got mine through).

Souonds like you have done the right stuff with your mods.

Where's you dyno chart? We want numbers!

[ferni]

Whats wrong with < 0.8mm Pete?

Try dropping the gap to about .6 - .7 mm, if that doesn't fix it then maybe look into some new coilpacks.....

Also what sparkplugs do you use?

[yellow34gtt]

Yep.

It's coil packs.

I wouldn't go much further than 0.8mm gap though.

Don't buy the Splitfires at $1000 though.

You should be able to get them for about $600 odd from Greenline, Nengun or Kudos Motorsport (group buy specialists who I got mine through).

Souonds like you have done the right stuff with your mods.

Where's you dyno chart? We want numbers!

thanks bass junky for the info,

did you get your coil packs local with local people or did you order them from an over seas mob and then sent to you. i looked at the 3 you said and i think kudos boys are local to order from gold coast i think..

any help on the matter .. im trying to get them in AU at the best price if possible.

thanks heaps

[insu]

Gapping down the spark plugs is a cheap fix, it just makes the spark work across the plug because the path of least resistance again becomes the spark plug, rather than the block where the coilpack usually arcs out when they're not working properly. By gapping down the spark plug you're reducing the area of burn and this can be seen as an inefficent use of burning fuel. In the long run, you're much better off changing coil-packs and running the gap as close to 1.0 as you can.

[Craved]

was mentioned by SK that over 18psi they run 0.6 anyway..

will not hurt anything.. i am running 294rwkw with 0.6mm gap..

[yellow34gtt]

was mentioned by SK that over 18psi they run 0.6 anyway..

will not hurt anything.. i am running 294rwkw with 0.6mm gap..

hi craved.

did you get your coli packs in yet .. did it make any change ...

[Abo Bob]

Those of us who have been around a while have seen this exact problem many times. I could have told you the answer to your query just from the title of your thread.

If you gap them down to 0.6 the best you will have is a temporary solution.

Get the Splitfires and be done with it. Stock GTT coils are shit. $1000 is a rip off. Should be able to find them for around $600ish.

Oh and ditch that crappy fuel pump. You are playing with fire there. I'd hate to see you lose an engine through trying to save $100 on a the fuel pump. Someone with lower power aspirations will buy it off you as I would still recommend it up to about 230rwkw.

[Craved]

nope havent put em in yet .. this weekend .. its getting worse lol

will do it and im putting in BCP7ES 11 in at 0.8 gap at the same time.. to see how it goes

i got my splitfires for $580 or so from nengun..