Rb26 Misfire

[KN6_GTR_VSPEC]

Guys I have a random misfire that popped out of know where !! I was driving on m4 last night and she was running great!! Then pulled into caltex near Blacktown filled up around $30 and turned car on and was sounding like a WRX . Check for loose contacts but all fine .

Went from there to Liverpool Krispy kernes , had a play sround resetting ecu and checking afms , no luck !

Proceded to head home via a mates house and as I left to drive back to penrith she came good all of a sudden , power was back and she was running 100% . Went on national park run with guys and no hiccups .

THEN just about 20 mins ago driving fine . Went to get a coffee . Turned it back on and it was doing it again!? So I took it home . VERY important I get this fiXed ASAP because car may be sold as of tomorrow unless this issue roots me over ;( car is very looked after and only use best of everything and regular service ?? I'm confused

[R31Nismoid]

Sounds electrical in nature.

Check all the connections etc. Could just be something not siting 100%

[KN6_GTR_VSPEC]

Would it be a coil or igniter box issue ? Because it just randomly came and went now back again!

[levinboy]

check the coil packs they might be on the way out

[SiR_RB]

Mine did the same thing when afms were stuffed. Was missing and running like crap, turn the car off wait afew mins then restart it again and it was fine for maybe 15mins or so until it started playing up again.

Changed them and no probs ever since

Try give them a clean

[GTR_JOEY]

Won't be coil or ignitor... They're good when they're cold but once they warm up and build resistance they will continue to miss fire as long as there is heat in them...

I'd be getting a second set of afms and swapping them in... Cleaning generally doesn't do a whole lot but wouldnt hurt to try

[GTR260]

Do u know someone with a consult cable? They are $88 on ebay, chances are it will be air flow meters but consult is a good way to confirm it,

My car is doing the same thing, checked it with a mates consult and confirmed it was afm's. Just dealing with it until i put the 35r on as i have a haltech platinum pro which is going in and will be running on map sensor

[R31Nismoid]

If you have a PFC and a H/C, you don't need consult.

You'll see the AFM voltage drop out and register an error.

[KN6_GTR_VSPEC]

Ok guys it has gone away with igniter box change , I'll keep you updated if it comes back , it is a random come and go thing so we will see . I have a consult cable .. What software will we need

[pistol-pete]

Was gonna say, sounds coil related. Same thing happened to my old stagea when one of the coilpacks was on its way out

[naga]

Sounds like a problem with the ignitor. I bought some aftermarket s2 coilpacks (transistor built in). One of the coils/transistors died and would short circuit and consult would throw a code 21 error code. Would happen for 2 minutes when the engine was warming up then be fine for the rest of the drive. I eventually bought nissan datascan and waited for it to happen again and turned off cylinders to find out which one it was. Replaced it and never happened again.