Ls1 Coil Conversion

[hairdryer33]

Mods

[hairdryer33]

Hi guys, ive just done a ls1 coil conversion on my s2 rb25. I does idle alot smoother and dirves almost like new, however there is still a slight miss around 4500 then accelerates then misses again at random after that till redline. My fuel pump isnt the issue an im running afr of around 10 to 11 at wot. Following mods are 3 inch dump and exhaust, fmic with 300zx plumb back bov, stock ecu turbo and injectors and a greddy style forward facing plenum, running 6psi as anymore and the missfire becomes more violent. Ive checked for leaks/holes in the pipes and silicon connectors but nothing found. Im lead to believe it maybe my cas?

Edited August 21, 2014 by hairdryer33

[Ben C34]

You have to increase the dwell or they will miss.

I have them on my car, with stock dwell they would miss, once dwell is raised, max 5 ms, all good.

Edit. Just read you are using stock ecu. So you can't raise the dwell. So that sucks.

Edited August 21, 2014 by Ben C34

[GTSBoy]

Yuh, if you want to keep them you are going to need a different ECU.

[hairdryer33]

Ok thanks guys

[hairdryer33]

I'll keep them forsure as its an improvement on the stock ones I had. Now just to save for a power fc

[MrStabby]

In the short term you should be able to stop the 4500 miss by closing the plug gap a bit. What gap are you running now?

[hairdryer33]

Good idea, I assumed from what ive read lsx series coil packs are the bomb so just left it. Was running .8 but now around 1mm as I thought it wouldn't hurt. I'll regap tomorrow and let you know how I go. Im on the hunt for a power fc now. The car has come along way, it all started when a dirty old vr commy kept up with me lol cooler full of oil and exhaust leaks didnt help along with dirty afm and restrictive pod (supercheap special now running hks 'shroom)

[MrStabby]

Agree that if the ls coils were running well that 1mm would almost certainly be better than 0.8, but until then, step down to 0.9 and see how it goes.

[jdm32r]

If you don't want to keep them I'll swap you for some super sparks with harness and cradle. Or buy them?

[hairdryer33]

I'll hang on to them thanks as it will be good to know I have a strong ignition system once the wick gets turned up