My question is, I know these stock coils are old. I would like a direct replacement. I have looked at the split fires, But i have read they have had issues with misfires also.

Since Im going to be using the launch control at the track ALOT, I need a coil that im not going to kill. Is a Stock OEM going to handle the abuse or am I better off going with the SplitFires?

Also does anyone have the OEM coil replacement part #? anyone have any Idea of the price of a dealer replacement?

splitfires are 450-500, and IMO are no WORSE than oem. it is arguable whether or not they are much better. but worst case, you are getting a new set of coils vs. whatever old crap came with your motor. i am running them now and they are okay.

i assume you tried putting in new plugs and regapping? plugs foul easy and even easier with a misfiring system. sounds like you might also have a boost leak. is your car missing really bad or is it just not pulling hard? if it runs smooth and just doesn't pull you probably have a boost leak or your tune is out.

Is your motor series 1 or 2???

You can get a coil similar to the buick coil from summit that will allow you to do a non-wasted spark setup. I forget the real name, sorry.

Also gawdzilla, I really don't agree with your suggestion that you are going backwards in technology by going to a setup that is not coil on plug. Granted 80s buick technology is old.

Evan

Then the more I ran the car it got to were it started misfiring anything above 5,000RPM's. On my last pass of the night it would not even rev over 5,000 While on WOT, and the A/F readings on my wideband went to 9.0 Which is Pig rich and it was holding 15lbs of boost, Not dropping off. I know there is no boost leaks and I also no its not a spark plug foul, It Revs Fine and idles good, no missing like a fouled plug would cause.

I pulled the plugs, They were Gray looking which seemed to be not too rich and not too lean, The Gaps are .022 just as I set them.

I have a s2 motor, Which if I went to the Buick coils I would have to buy a igniter and hack my harness, Which I don't really wanna do. I would rather just buy what fits and plugs in and go.

Im also afraid of the buick coil not working with my launch control which I just spent 300$ on.

Im almost 100% my coils are getting weak. I don't think they have been in the greatest shape from day 1, I just didn't wanna spend more $ than I had too.

I mean, Something is Def screwed, I went from a 7.80@91 in the 1/8th to 10.02 @ 67, on the same tune.

How to....

take your coils out and pull out the coil harness where its easy to see.

Mark each of the center wires they should be some combination of red/xxxx another color. Number them so you will remember what cylinder they fire.

Start at the ignitor and de loom the harness towards the coils. You will have 3 wires to each coil. 1 power, 1 constant ground, and 1 switch ground from the Ignitor.

The factory ground going to each coil will not be used.

Take the factory power and either daisy chain it across all the MSD coils or use it as a switch 12v for a thicker Relayed system.

Recommended
We used 10 gauge wire and a high amp replay since the factory wire is thinner gauge. You can use the factory power wire to switch your relay.

Now run your power, daisy chaining it off every coil to (+) side on the coil.

Now for the switch. Youll need to extend all the wires coming from the ignitor. The ignitor is a large relay essentially and it sends ground pulse.

Run a lead to each coil in the order you marked before removing the harness.
This goes to the (-) negative side of the coil.
Then use the boot kit they come with and make your wires and mount the coils somewhere and fire it up.

1990 240sx (RIP)
1989 240sx (sold)
1996 240sx 408ci V8 (sold)
1972 Datsun 240z LS1-T project (in progress)

Yes, I own that car now, and have no problems w/ it whatsoever...if you need me to help out anyway with getting this setup to work for you, let me know...i'll help where I can

edit...didn't see the pictures, but thats my engine bay in the pics he posted lol

My only question is on a SII we don't have ignitors. Is this a problem running that setup?

Yeah it kindof is but it works equally as good as stock and is ALOT cheaper to replace when the time comes.

Anyway, the MSD setup looks pretty good too.

Evan

Quote, originally posted by crccustoms »

good clean setup blown240, and i agree you'll end up spending as much or more with the stock style coils than the msd setup with 8mm that can be achieved for around $350 from summit, and if you need more spark due to higher compression $400 buys you higher output coils and 10 mm wires, the summit (sum-850500m) coils are rated at 51,000v and have enough power to fire the discovery space shuttle to the next galaxy, there $50 a piece at summit, $75-100 for a good set of wires and your set, and you would go about hooking up that setup the same way as the msd, negative being the trigger, which comes from the harness that your stock setup uses

I cant take much credit since the previous owner (brandon) did the wiring but I fully understand how it was done and how it works.

did you try putting in new plugs? i always keep a spare set in my toolbox now. in my experience, once plugs have seen a bit of missing (or poor tune), they don't perform nearly as well as a new set. i have tried torching the plugs to clean them up too. if you're running colder plugs, they will foul easier too. just grab a fresh set to rule out the plugs themselves. they're what? $1.50 a piece?

I really don't think its electrical, Its def something with the spark.

I am running a # 4 cold plug. Always had great results on this motor with it. Been running those kind for 2 years. I have about 26 track passes on these plugs.

Ive tried to help push you in the right direction man but if you dont want to listen then thats cool too, i think that you fail to see that an 80a alternator cannot provide power to a car that has to run high amperage drawing electric fans, provide power to 6 coils which are individualy fired as well as 6 injectors all while powering the car's electronics and interior.
Stick a multimeter on the battery terminals and run leads into the cabin and see what voltage looks like with everything on and running, i bet it will be low 13's at best...most likely high 12's.

I have a volt gauge hooked up to my solenoid that runs all my electronics, Which is the furthest from my alternator. It reads 13.8-14.0 Even with my electric fans on. Along with everything else I run.

Ill look at it a little closer, But im just not seeing it as a problem. Its ran on that same system for a few years now.

I personally think the misfiring of the coils on my launches has either killed my coils or my plugs.

Its just weird that it will start Idle and rev free fine just like always. But in my theory of a weak coil it will do this and when I get into High boost its blowing my Spark out of the plugs causing the misfire. Thats the only thing I can think of.

Another reason I think they are weak is due to I had to run my spark plug gap so small .022 after raising my boost from 10-15lbs, it wouldn't stop misfiring until I changed the spark plug gap.

Is there a Real way to test the coils?

How does the Gizzmo install? I take it you attach it to the input side of the ignitor? And you install with all 6 trigger wires right?

If so it will work fine if you use the blaster coils listed above.

As a side note. How much did you pay for that gizzmo launch control? I could probably make those things for people for pretty cheap if there was a demand... shift light and all

what are guys doing over in the rising sun?? everytime i see a jap rb they are running stock coilpacks. it seems to work for them.

is there some sort of voltage stabilizer that is maybe on the car but when we get the engines over here we dont get them with motor sets????

all i know is i hope i dont run into this one the neo is up and running lol

The Gizzmo has 16 wires, 6 input on coil signal to ECU and 6 output to coils from gizzmo, 1 ground, 1 power, and 2 tach signals, one from ECU to unit and one from unit to Shift light. Nothing hooks to the CAS.

Im assuming it will work also, I just don't wanna buy then find out It won't work. I know the Gizzmo works with some coils and some it does not. Ill have to try and find out what it won't work with.

Also Carl H, I looked at my Volt gauge Closely, it runs about 14.4- 14.7 without the electric fans on. When I hit the Switch it goes to about 14.4 and stays there. So Im also ruling out Alternator.

Any other suggestions before I go buying coils?