Worsening Misfire

[kitto]

If you end up wanting split fires and a brand new ignitor, I have both...

- Ive got some 2,000km old split fires

- Brand new genuine nissan ignitor

- Brand new coil pack loom

PM me if you want more details. Thanks

[MrStabby]

I don't know what new ones cost or if they're available.

FWIW $620 from rhdjapan. Ouch.

Do put a set of the right 0.8 gap copper plugs in before anything else. See djr's quote in my sig

[kitto]

FWIW $620 from rhdjapan. Ouch.

Yeah, they are costly, i didn't pay that much but it was well over $400!

[Ad's]

Also are they expensive to get a new one?

Pretty bloody expensive from memory well over the $1000 mark new from Nissan. So if kitto bought a bran new one i would say buy that if it's still new.

[GH05T]

So new brand coilpacks don't just bolt up? Bah got more reading to do I see,

I had wound my boost controller. Ack one click. Weird thing is I'm still maki almost 1 bar boost... Anyway in the cooler weather it seems to not miss

But on first start up u need to rev a few times cos it can die after falling the revs. After a couple of throttle blips it stay in idel but does have a misfire on idle still, I will start with plugs

[SargeRX8]

But on first start up u need to rev a few times cos it can die after falling the revs. After a couple of throttle blips it stay in idel but does have a misfire on idle still, I will start with plugs

This probably has nothing to do with your plugs. I, and about a thousand other skyliners, have this issue. First cold start, the car will often die down or struggle then kick back up after a tap of the throttle. Ive got almost a new everything that you can get bolted onto the motor and its still there. Another guy replaced even more parts with brand new genuine parts and the issue is still there. NFI what causes it or how to fix it.

[GH05T]

I'm not that fussed about he cold start , pre throttle blip rev die down. More fusses about the constant idel misfire which I assume matches wih my "sometimes" boost missfire

[GTSBoy]

So new brand coilpacks don't just bolt up? Bah got more reading to do I see,

Oh, you can get new coils that will just bolt up, but only ones that still need the ignitor pack you already have (or a workign version of same if yours is borked). My suggested plan was what I would do if faced with a dying igniter on an R32 or S1 motor right now. That's because buying a set of new Splitfires with igniters built in costs the same as buying some with no igniters. So you get new coils, throw the old igniter in the scrap bin, spend some coin and effort on wiring the new coils in and Bob's your older male relative.

[DVS JEZ]

GTSBOY have u tried wiring in S2 coilpacks? Ive never thought of trying it???

[abr33]

This probably has nothing to do with your plugs. I, and about a thousand other skyliners, have this issue. First cold start, the car will often die down or struggle then kick back up after a tap of the throttle. Ive got almost a new everything that you can get bolted onto the motor and its still there. Another guy replaced even more parts with brand new genuine parts and the issue is still there. NFI what causes it or how to fix it.

I recon you'll find its air in fuel line, after being sat for a while, mine does that too, i dont have anything stock and it can do it, prime fuel twice, bingo

[DVS JEZ]

I recon you'll find its air in fuel line, after being sat for a while, mine does that too, i dont have anything stock and it can do it, prime fuel twice, bingo

Without starting to go too off topic, they found the opposite. Dont prime and it will start alot better. See the general automotive section. The threads in there

[zoidbergmerc]

Missing that gets worse over time and even worse with shit fuel.

My bet is on something to do with the spark.

Throw some new plugs in like MrStabby said and see how you go

[GTSBoy]

<br />GTSBOY have u tried wiring in S2 coilpacks? Ive never thought of trying it???<br />

<br /><br /><br />

No, not tried. But it can't be any harder than doing a Falcon coilpack conversion. Got to be easier in fact, because of not needing to deal with diodes etc. All the same wiring and signals are there, just need to connect the ECU wires that were originally connected to the igniter direct to the new coilpack loom, deal with the power supply and earthing and it's done.

[MrStabby]

No, not tried. But it can't be any harder than doing a Falcon coilpack conversion. Got to be easier in fact, because of not needing to deal with diodes etc. All the same wiring and signals are there, just need to connect the ECU wires that were originally connected to the igniter direct to the new coilpack loom, deal with the power supply and earthing and it's done.

I asked about doing it in a thread a while back and Rolls said he's seen it done plenty of times, so apparently they didn't change the signal voltage or make any other changes when integrating the ignitor with the coilpack. So +1 to GTSBoy's suggestion - just do it.

[GH05T]

Sorry if this is a dumb question but do 32 gtr coilpacks work with the rb20 at all?

[GTSBoy]

same same

[GH05T]

ok so i apologies i mixed my threads up a bit so i will recap,

i spoke about this here

other thread

but i will recap

this was the major problem i found leadin into the intake, massive split. replaced it and it removed allof of the dramas, mush better idle and solved almost off of the boost problems.

Interestingly also it made massive boost when fixed and the waste gate is working allot better so yeah allot explained.

HOWEVER!

i am still hunting idel from about 900 - 1100 and i do have a hickup on idel, allot lot less but i do have a random boost cut and i get thrown forward when it missifres.

ok so...

i replaced my spark plugs today with NGK copper BCP5RES plugs ( i couldnt find BCP6RES) so i hope the heat rating wont make a difference?

all plugs i took out looked fine appart from the front most which was black not grey

in order

1 and 2 compared

dunno what this tells me?

also we did a compression test which gave me interesting results

from front to back

130

130

130

112

112

112

whats going on here?

i have not checked my tune yet cos i canot afford a $600 nistune remap at the moment

i have been told my gtr injectors are new and my bosh 440 is new and my coilpacks are new but you know who knows.

can my lifters or injectors be causing this? im a little lost but hoping the tollorences on the cylinder compressions are not dangerous?

also just to throw a spanner in the works this is a weird one, if i turn RIGHT hard...it misfires badly if i boot it...

[GH05T]

weird thing is that the fouledplug was on one of the 130 cylinders?

should i be worried?

[GH05T]

Any one got ideas?

[GH05T]

Does anyone have even an Xfies theory on the miss fire when turning right issue, very weird.

Mary a fuel delivery issue? Where would I even start?