Rb20/30 Misfire At 3000rpm Not Plugs And Power Cut

[HYBRID VL]

well i have a problem with my car RB25/30DET in a Calais its liek when i take off or give it in gear like bout 3000rpm i get a really nasty misfire shuts power off stereo turns off then back on and alarm light flashes and so on but dosnet shut my engine down.

i thought it was plugs but i just changed them.

i noticed today that the silicone hose between cooler pipe and throttle was split so ill fix that but i dunno what this misfiring is.

i think it could be ignitor i have no idea really can some1 help me here???

[BHDave]

Mate, that doesn't sound too healthy.

I think your first point of call will be checking the electricals, in particular where you have spliced into the VL body loom for power and ignition for the new engine loom.

Something is pulling a hell of a lot of power and/or shorting on the same circuit that the alarm and stereo are connected to i'd say.

[HYBRID VL]

well i have owned the car for about more den 1 year and i havnet had this trouble before.

i thought maybe theres a short like on my stereo wiring somewhere its just like it was all good i did a burnout then went to do another 1 and it started from there.

when i took it out today i went up the street and i took it over 3000rpm and it didnt do it but after about 5 min driving i did the same thing again and it did the same thing.

[HYBRID VL]

ok im just checking all wires behind the dash instrument cluster im going to pull my system out and check there aswell then im going to check at the look into the MT8 ECU see if anythings happening there.

if its a short somewhere i thought it would have blown a fuse by now or somthing.

and is there a way i can find out what Cylinder the misfire is on.

[HYBRID VL]

ok looked behind my dash cluster 2day and rewired all things i have running on accesories System,Gauges started her up and it sounded like a WRX missing a cylinder took it for a run and it went very well aprat from the sound.

i gunned it up the street seemed all good went up another street and it was like it missfired and spat and spurted turning my system off and then back on but it dosent stall the motor.

now im going to check plug gaps tomorrow and im starting to think i have a coil breakdown somewhere.

is there a way i can check the coils or inspect them

also my mate was telling me of a ground wire that goes from cyl 6 plug to a bolt and 1 from the ignitors does sum1 have a pic of this i have the one near the plug but dunno about the other 1.

also i was thinking could be my tune as when i got it dynoed i had 150rwkw and a throttle body problem i fixed my throttle body cable and my clutch started slipping and i just got my clutch done bout month ago and i havent had it retuned.

do u think that could be a problem???

[HYBRID VL]

any 1???????