as per title, does one give a better spark than the other? I have a 93wrx and it has decent coilpacks with no cracks etc, however at peak boost, sometimes it feels like there is a tiny misfire (not audible but it can be felt through the accelerator if you know what I mean) and I am thinking it is down to the spark.

If the coil and leads is the way to go, does anyone have a step by step guide of how to do it.? and what leads to use (I imagine the coil would have to be mounted remotely.)

Input // advice appreciated

 

free bttt as I would like to know as well.

 

I would think it’s a case of altering the wiring loom to fit the coil? I had to modify a couple of engine looms which where made for coil packs so they would work on later models with a coil. Assuming the ecu fires in the same order of two cylinders at a time then it should be just a case of the loom then adding the coil and leads?

First thing to check is the ecu pinouts.

 

From what I understand one is no better than the other in terms of spark power. I've heard that the single coil and leads are deemed to last longer hence more reliable. The single coil pack is less prone to breaking down (but saying that I've had the HT leads break down on mine!). Cost also comes into it as the coil per spark plug seem more expensive than the single coil and leads can be bought individually from the dealer should they become an issue.

Not sure whats involved but it cant be too difficult as its only 3 wires and bolt the coil to the manifold. I'm sure I've seen a thread on here where someone has done it.

FYI the set of leads are about £55 from subaru and I think the coil is £140 ish.

 

similar discussion of 22b at the moment..

I have just gone from coil on plug to 98 coil pack and leads.. I went from a misfire at 1.2ish bar to no misfire at 1.7bar but the coil packs were old.

I got four old coil packs and soldered them to the 98 coil which allows me to plug it straight into the loom.. I have mounted the coil pack on the bulk head / pitch stop and used longer leads.. cost I think was 50 for the coil pack and 20 for the leads from Halfords.. although they only 4 the same colour in yellow lol I did for 2seconds consider different colour leads but would have had to take myself outside and make myself sick if I did that!!!

You need a 97 / 98 coil as the 99 to 00 has the ignitor built into it.. altohugh you could remove the ignitor (under the boost solenoid bracket on the drivers side wing) and run a 99/00 coil or newage individual coil packs (which are being raved about on 22b)

Simon

 

The individual coils then, are they wired to the igniter or somewhere else (not had a chance to look) if so can the later coil (with igniter) be connected onto the igniter wiring and then the leads run to the plugs or is it more involved?

Does the igniter get the signal from the ecu yet?

 

the ecu trigger goes to the ignitor and from the ignitor to the coilpacks.. my understanding from looking at the wiring on the car anyway.

you could indeed remove the ignitor and alter the wiring so the newage coils with ignitors work..

You can also adjust the dwell times with the PFC which you have on your car etc..

Simon

 

Ive not had a drink and I still dont know what that means

 

the new coils may need a different dwell time which can be adjusted if needed using the laptop plugged into the PFC.

Simon

 

ahhh I see so it wouldnt just be a plug and play kind of thing

 

I would expect with your current set up they would work with no issue..
just it is possible the dwell might need altering.. but you have the ability to adjust it anyway.

Are we going around in circles?

Simon

 

I was just thinking further down the line for when I fit my tdo5 as I want the best spark possible (want to get a fmic to use in conjunction with the turbo but am just in the process of moving house so funds are a bit tight at the moment, not to mention larger injectors)!!