R32 Gts-t Rb20 Missfires On Highish Revs

[Kazacoon32]

Hey SAU,

My 32 seems to missfire at high revs say about 3500 grand onwards on and off. . . I've looked at other topics but I've already changed allot of parts to try and fix the problem . .

I've installed new spark plugs (plat/iridium) and new coil packs ( super spark) and changed my air filter I've checked for boost leaks but cant find any. . and there isn't any water in the fuel tank I've even tried changing the pressure of the fuel with a sard FPR but yeah still nothing works . . i also thought to drop the boost but that made no difference either so I am dumb founded to what it could be . .

any help would be appreciated

cheers..

[JKR-32]

could be ignition module, or coilpack loom. or afm maybe...

those are probably all worth checking. probably one of the first 2 though

Edited June 12, 2010 by JKR-32

[Kazacoon32]

  JKR-32 said:

could be ignition module, or coilpack loom. or afm maybe...

those are probably all worth checking. probably one of the first 2 though

afm = air flow metre?

yeah ive checked the coil pack loom already but havent checked the ignition module yet i cant seem to find any anywhere . . ive even disconnected the sensor on the dump pipe cause apparently that sometimes causes it. but that made no difference. . the revs are really bad too it fluxuates around 200 to 600 revs . . i just had a play with it again then and i'm thinking it might be a vacuum leak somewhere i just cant find it cause that'll explain the fluxauting id;e revs and when i try and boost it past 7 pound thats when it starts missfiring it has nothing to do with how many revs i give it

do you think i should just get rid of the stock intercooler and just redo it and put a front mount and change all my vacuum hoses?

[Bl4cK32]

check spark and fuel. Injectors had a clean anytime?

[R31Nismoid]

List of full mods. Sounds like something is up

Why do you have a sard FPR? What ECU setup?

[turboedsloth]

are any of the plugs that go into the coil packs broken?

[Kazacoon32]

  turboedsloth said:

are any of the plugs that go into the coil packs broken?

nope checked em this morning

[Kazacoon32]

  Bl4cK32 said:

check spark and fuel. Injectors had a clean anytime?

i had the injectors cleaned also when this started first occuring and they passed flow testing also

[Kazacoon32]

  R31Nismoid said:

List of full mods. Sounds like something is up

Why do you have a sard FPR? What ECU setup?

super spark coil packs

plat/iridium sparkies

3" cat back 5zigan exhaust

hks pod filter

had a boost T but just took it out to see if it made a diff but it didn't . .

sard FPR ( was gonna increase the flow when i put other mods in it so its just running standard flow )

f/r strut braces . .

boost gauge

thats about it its not really worked or anything

[R31Nismoid]

coil pack loom or the ignitor will be stuffed then by the sound of that.

And don't use iridi plugs - you've probably already fouled them again which isnt helping.

Use coppers.

[TUF250]

why do the iridium/platinums foul quickly? i only ask because I just put a new set in mine

[Bl4cK32]

  TUF250 said:

why do the iridium/platinums foul quickly? i only ask because I just put a new set in mine

smaller electrode means less is required to inhibit the spark

[Kazacoon32]

  R31Nismoid said:

coil pack loom or the ignitor will be stuffed then by the sound of that.

And don't use iridi plugs - you've probably already fouled them again which isnt helping.

Use coppers.

oh true copper ones huh??

well i'll def put some new ones in then and try and source an igniter

[R31Nismoid]

Well dont change them if they aren't stuffed - but my guess would probably be until you get the issues sorted out... then you'll keep fouling plugs and iridi's foul super easy.

So even if you fixed the issue, you'll have plugs that are stuffed and not helping/showing the same symptoms as before

[h_thomas]

did u say u changed the fuel filter?

if i was you, id drop into a local garage that has a scan tool, and get them to check for any sensor faults.(providing they have the correct adapters ect, on my r32 the adapter is just above the fuses in the cabin of the drivers side.mines a 14 pin connecter, but they also come in 16pin)