Rb25det (frustrated)

[driftersilvia240sx]

Hello guys, this has been brought up multiple times....Rb starts great cold, but when warm will not start back up....
Stock everything
other than fmic, exhaust, i have replaced coolant temp sensor nothing...
It does start to miss fire when warm slightly, timing is spot on... i suspect possibly a bad maf, o2,coilpack, ignitor (S1),fpr im stumped ... out of frustration i bought a Z but i miss driving my 240 so much... If you have any suggestions lemme know...And if theres any additional info i can give let me know

[driftersilvia240sx]

i plan on working on it this weekend and posting a video of symptoms

[Carl H]

sounds like classic coilpack/ignitor failure if it only does it hot.

[DA 240]

I've got to ask the obvious question, did this start after installing any new parts?

[driftersilvia240sx]

DA 240, no its always plagued me...Ive been working on this specific car now for 5 years.....and its been a nightmare. Ive had everything that could go wrong, go wrong from headgasket to pistons in the oil pan...Im at the point were i ordered a new long block and bolted up intake and exhaust and everything else and to my suprise its actually running.
So, im so close to driving it i can just taste it...But im having this small irritating problem...ill purchase some coilpacks cheapest ive found were on enjuku brand new for like 68$ a piece...i know spitfires is the way to go but honestly the stock packs should be fine for what i want out of this rb...illl keep you all updated as much as i can

[driftersilvia240sx]

Anyone in the MI area???

[Yellow4g63]

Get the LS2 coil packs and wire them up. You don't need the ignitor with them.

[Darius]

+1 on the coil packs

You will likely want to go the LS coil route eventually, so if it doesn't turn out to be the solution to the current problem, you're not out money and effort.

[driftersilvia240sx]

Roughly how difficult is it to do the conversion ...I've always wanted to just didn't want to add to the headache ya know

[driftersilvia240sx]

Ok this morning i started the car let it warm up, all was well but the car will not start back up under warm condishions... This weekend im pulling sparkplugs to see if they are satcherated in fuel...If so do you think coilpacks???

[95_240]

Have you tried cracking the throttle when starting?

[driftersilvia240sx]

i use to i dont have to any more (on cold start)...On warm it doesnt help ill get some sputtering but thats it...But it does start without throttle

[driftersilvia240sx]

http://www.rad240sx.com/2011/10/ls2-tru ... 2-rb25det/
alright guys found this really good write up, im thinking of tackleing it...Did my own harness so how hard can this be right only thing im curious is why would i have to run a aem,apexi power fc ect??? cant i just run off of stock pcm???

[mixeds14]

U don't have to run a stand alone to run ls2 coils.. Ur stock ecu works just fine, that's what I'm running now.. Believe me it's super easy to wire them up n u thank ur self for doin it. My idle improve as well with the coils.. I believe u have to run a stand alone to get the full potential out of the coils.. But they work fine as is

Try this diagram on the coils, just match ur stock to the ls ones..

http://www.megamanual.com/seq/coils.htm

[driftersilvia240sx]

This may sound stupid but do i still have to run the ignitor i skimmed threw...im not sure..
Thanks Mixed

[mixeds14]

This may sound stupid but do i still have to run the ignitor i skimmed threw...im not sure..
Thanks Mixed

Dont thank so, Ls coils have it built in

[driftersilvia240sx]

yeah, one more thing from the Stock ignitor pigtail to new LS harness do you just mate them together...By cutting and soldering?

[driftersilvia240sx]

Alright guys purchased my ls2 coils 38$ a piece lifetime warranty...
Im still at a fork in the road though, most of the write ups are for a S2...Myself i have a series 1 to bypass the ignitor what do i do???

[Yellow4g63]

Check the LS2 coil wire up on the forum. Prob have to search for it might be a few pages deep by now.

[driftersilvia240sx]

assuming this is correct i havent looked at my rb all day pulled this from a thread...

Sil240 wrote:Wires that go into the Ignitor, in the firing order:

1) Blue/Orange
2) Blue/Black
3) Blue/Red
4) Blue/Yellow
5) Blue/Silver dots
6) Blue/white

[jbracy7]

I also needed that info thx a ton,i kno its lame but,are u using 90+ octane

[Darius]

Check out page 1 of this thread towards the bottom:

my-ls2-ls7-coil-swap-t353832.html?hilit ... %20ignitor

"The stock ignitor is wired in order of firing order and not cylinder number. So, pins A-F are wired to cylinders 1-6, respectively.
1) L/O
2) L/B
3) L/R
4) L/Y
5) GY/B
6) P/W"

[driftersilvia240sx]

Daaang it Darious thanks anyway i just pulled a wiring schematic and just did it on my own....But anyways Success guys I did it!!!! I will post pictures when done kinda looks like a mess right now but fires and GREAT!!!

[driftersilvia240sx]

All in all i did find my real problem looks like i had japanese mice chew up bits of my coil pack harness no wonder why it was missing....But all is well thank you guys so much