79 280zx Ignition Module - Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z
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Old 03-18-2006, 06:08 PM   #1 (permalink)
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Default 79 280zx Ignition Module

Hi everyone, I've been having problems with my ignition module for quite some time. I've replaced it three times with OEM parts and my problem continues to exist.

Problem:
After driving a period of time (ie. 40 miles) My Z tends to shut down, granted is does get a bit hot in engine. I'm figuring the OEM ignition module cant handle long term heat exposure?

I'm open to suggestion

thanks
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Old 03-18-2006, 08:32 PM   #2 (permalink)
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Default Re: 79 280zx Ignition Module

or possibly the coil?

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Old 03-18-2006, 10:24 PM   #3 (permalink)
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Default Re: 79 280zx Ignition Module

Similar to mine. I had a new dizzy on mine and still did it. Would run along fine for awhile, then cut off. If I switched the key off and on while running in gear, it would fire right back up. Finally got to the point of not starting at all. This was last summer. Had the module tested, and it was good. So rather than fight with electrical gremlins under the hood, I went MSD route. Fires in less than a second every time even at 20degrees. Just wired in a kill switch to battery connection beside radio. Also confuses people who don't know it's there.

There is probably a way to find these gremlins and correct them, but I don't care about fixing 25 year old wiring harnesses. I by-pass them with newer technology.

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Old 03-19-2006, 11:14 AM   #4 (permalink)
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Default Re: 79 280zx Ignition Module

Storyteller803 thanks for your Input. When you said you went MSD route? could you talk about a little bit more about that.. or better yet is there a link that talks about it?

thanks again all..

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Old 03-19-2006, 11:38 AM   #5 (permalink)
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Default Re: 79 280zx Ignition Module

www.msefi.com.

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Old 03-19-2006, 01:12 PM   #6 (permalink)
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Default Re: 79 280zx Ignition Module

Do a general search for msd install or something to that effect. Basically, you need an msd box and a tach adapter. Works well with the zx electronics. <http://www.msdignition.com> gives you the layout of the system. I picked mine up from Jegs for 149, and the tach adap. for 49. If you want the rev. limiter, gonna be an extra 50. Search for msd 6a or 6al. Now you won't get much improvement in HP numbers, I've tested both stock and msd. But what you will get is steady idle, quick starts at cold temps, much hotter spark, better emissions, and if you're running rich, better combustion. If you are running rich, you'd better tune that first.
Quite simple, actually. 2 ways to trigger the system, points, and magnetic pickup. ZX dizzys have magnetic pickups and is what I use. Eliminates the stock module. Just make sure you have a good connection to the battery.

I'll probably get ripped from those who say the stock ignition is fine, which it is. But when you have wire gremlins, and don't want to chase down wires from every which way, by-passing is an alternative if you have the funds.

Couple notes, MSD recommends at least dual platnum plugs which I use and coiled wires. Solid core wires cause a lot of interference. I use Accel 8mm spiral coiled wires. Set you 50 for wires and 35 for plugs. Up to you if you want to spend the $ for all this, but you'll have a working ignition system.

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Old 03-19-2006, 03:35 PM   #7 (permalink)
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Default Re: 79 280zx Ignition Module

thanks for the feedback, this is definitely a viable option which i will need to explore more..

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Old 03-20-2006, 11:44 AM   #8 (permalink)
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Default Re: 79 280zx Ignition Module

why is your engine becomming hot?
since the module is ahead of the engine, the engine temp is not the issue.

any chance that you simply need to change the fuel filter?
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Old 03-20-2006, 06:38 PM   #9 (permalink)
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Default Re: 79 280zx Ignition Module

agree with tkr, if you're so hot under there you're burning up modules, then that's not the problem. Shouldn't be too hot to touch the module after running full temp for awhile. I dont' think normal engine heat will kill a module. Don't start throwing $ into parts that aren't going to fix the prob. If you have heat issues, get them worked out before deciding to go MSD.

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Old 03-20-2006, 10:20 PM   #10 (permalink)
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Default Re: 79 280zx Ignition Module

my temp is running I would say a notch past the center middle point (just past the logo). This car has always run hot for me. My Z is running with 80% new parts, including engine. Electrical components I must say fall in the 20% catagory. Interesting thought process regarding the fuel filter, I do have a new fule filter laying around. I didnt think the fuel filter is tied in to my problem?

storyteller803: what's the difference between MSD6a or 6L?


Once again, thanks all for your feedbacks

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