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snailman153624

Hei Ignition Modification

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I just wanted to start this thread for people to post ideas/comments on this mod, as well as the write-up I put together here (since the write-up thread is naturally closed):

http://www.mazda626.net/index.php?act=ST&f...t=0#entry143397

I also wanted to point out that I updated the links to the new port number on the webserver; if you find any broken links to mazda626.servehttp.com PLEASE send me an email with a link to the page containing the broken link:

mazda626admin@mazda626.servehttp.com

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Marcin, i have a question about this. I read the thread about some of the symptoms and it does sound like it could be the problem, as they occur at random intervals. The main thing that happens is i'll start the car and it will idle like absolute crap for a minute or so, then it goes away.Is there a way to test it and be sure that its the problem?

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Hi Marcin. Im just lettin u know im doin this mod for a GE2 dizzy atm, so I shall let u know when I have done it.

For those of u wondering, I have done this mod a couple of times myself, and it works. ;)

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Marcin, i have a question about this. I read the thread about some of the symptoms and it does sound like it could be the problem, as they occur at random intervals. The main thing that happens is i'll start the car and it will idle like absolute crap for a minute or so, then it goes away.Is there a way to test it and be sure that its the problem?

You can (using your stock disty) interrupt the ground signal going to the stock igniter (this will involve a few feet of spare wire) and see if you get a consistent spark every time you break ground (this is how the ECU triggers a spark event).

Also, you could just have someone crank the engine over while you hold one of the ignition wires (and a spark plug, duh) to your block and look at the spark. Bright blue = happy, orange/red = not enough energy to initiate combustion.

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Also, you could just have someone crank the engine over while you hold one of the ignition wires (and a spark plug, duh) to your block and look at the spark. Bright blue = happy, orange/red = not enough energy to initiate combustion.

Just to make sure i do the experiment correctly, i'd want to hold the wire while its still down in the spark plug well and watch the color of the spark? Or, do you mean take a spark plug and stick it to the end of a spark plug out of the engine and see what color it is?

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Pull the spark plug wire out of the spark plug well, re-attach a spark plug to it, and ground the spark plug to the chassis before attempting to crank. I didn't ground the spark plug to the chassis, and fried the internal coil -DUH.

You ground the spark plug to the chassis simply by having the spark coil threads touching any good gound point such as the valve cover.

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Hi guys. I thought I would post this, since as far as I could see, I couldnt really find a write up for a GE2 (94+) dizzy.

My distributor finally packed up last saturday. I just finished work, cranked her over, she started, then died. Tried to start again and nothing, dead as a doorknob. LOL. I had to get towed all the way from town to my house which is about 20 odd kilometres, and I thank Contempo heaps for doing that. ;) I decided to finally do the HEI mod, which i was preparing for a long time ago. About time really, haha.

Here are some pictures of what I did:

Dont worry, the MSD coil is only temporarily there. I am waiting on a Coil bracket.

dsc004194zw.jpg

backup link: http://img325.images...dsc004194zw.jpg

dsc004178sg.jpg

backup link: http://img247.images...dsc004178sg.jpg

Here is the wiring diagram for the HEI unit (I hope you guys didnt mind me altering your diagrams):

heige26gb.gif

backup link: http://img325.images...e=heige26gb.gif

And heres a diagram for the HEI unit with an external coil (remember to disconnect the 3 pin plug from the Distributor):

extcoilheige26zx.gif

backup link: http://img325.images...ilheige26zx.gif

Just to point out, it just seems to be the reverse of the GE1 wiring, and you dont need a tacho feed, as the ecu already has its own. Another point is that in the GE2 distributor, there is a tower going from the internal coil to the distributor cap. I cut that off just to make sure the spark doesnt go anywhere it shouldnt:

img-215624-5-dsc004204yc.th.jpg

I also of course had to drill into the distributor cap to put the 'power tower' in to allow for the external coil. ;)

Thanks all for the inspiriation of doing this. The GE1s were very successful, I had to try a GE2. Remember, this is just a guide, it all worked for me. I can not be hold responsible for any mistakes or anything that doesnt work. Thanks again all. :smile:

post-15320-0-50858200-1340975846_thumb.j

post-15320-0-37346700-1340975847_thumb.j

post-15320-0-88666200-1340975847.gif

post-15320-0-42899600-1340975848_thumb.g

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Ok i searched and my question still goes unanswered...what is the purpose of this mod. i seriously have no clue. To fix idling problems i guess, but from what misfires? if so i want to do it BAD. Does it work in i4's cause the only section i've seen this in is V6

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No. The whole purpose of this exercise is to replace the ignitor and coil. you see with the V6s, the ignitor and the coil for the ignition system are incorporated in the distributor itself, hence the pics and the problems. After being in the car this long, and under all that heat (being right next to the engine itself) the coils, but more often the ignitors tend to fail.

I know here in Australia, Mazda wants in excess of $900 for a new distributor (yes you have to buy the whole thing because its all in one) or you can get an ignitor plate for around $800. Either that or you get a second hand dizzy for about $400, but the chance of it working for too much longer is also not that high.

What this mod does is allow for a cheap and effective way to replace the ignitor and the coil if need be, by hooking up an alternative, external ignitor and coil. A new ignitor here is about $50, and a msd blaster coil is about $80. That is still a lot cheaper than buying a second had dizzy even, and with better effects. This also helps us because these units generally put out a better spark than the stock ones.

You should not need to do this on your I4, as if i remember correctly, you already have an external ignitor and coil. hope this answers your questions, although it is one of the first things mentioned in this thread by snailman:

HEI ignition mod

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Thanks i read a couple threads about it and was totally clueless (not good with cars) least now i know not to read cause it dont apply to me :lol:

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Nice writeup pacman!

And no problems with the tow, thats what I bought a 500 pound ceramic clutch for, to be a recovery vehicle for klde's :P haha

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I have just completed the mod on my '93 MX6 2.5 V6 ... and I still have no spark! On my South African model, the distributor connector wires are completely different colours. I connected mine up according to wire positions as suggested by Joe Baily and others and I opted to stay with the existing internal coil. My connections are as follows when viewing from the harness end of the connectors:

3 Pin:-

a) left wire taps to terminal 'B' (power) of the HEI

B) right wire taps to terminal 'C' of the HEI

c) center wire not altered

6 Pin:-

d) left wire cut off and the harness end connects to the 'G' terminal of the HEI

I did remove the strap from within the distributor.

Can anyone spot any obvious faults with my wiring or suggest how I go about fault finding.

Any help would be greatly appreciated.

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I'm having some problems with my 94 es. I think its the dizzy. I get full power but the doesn't start. This happened b4 and I had 2 replce the dizzy.

How do I check 2 kno 4 sure its the dizzy ?

What other things could I check 4 ?

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Hi guys. I thought I would post this, since as far as I could see, I couldnt really find a write up for a GE2 (94+) dizzy.

My distributor finally packed up last saturday. I just finished work, cranked her over, she started, then died. Tried to start again and nothing, dead as a doorknob. LOL. I had to get towed all the way from town to my house which is about 20 odd kilometres, and I thank Contempo heaps for doing that. ;) I decided to finally do the HEI mod, which i was preparing for a long time ago. About time really, haha.

Here are some pictures of what I did:

Dont worry, the MSD coil is only temporarily there. I am waiting on a Coil bracket.

img-274526-1-dsc004194zw.th.jpg

img-274526-2-dsc004178sg.th.jpg

Here is the wiring diagram for the HEI unit (I hope you guys didnt mind me altering your diagrams):

img-274526-3-heige26gb.th.gif

And heres a diagram for the HEI unit with an external coil (remember to disconnect the 3 pin plug from the Distributor):

img-274526-4-extcoilheige26zx.th.gif

Just to point out, it just seems to be the reverse of the GE1 wiring, and you dont need a tacho feed, as the ecu already has its own. Another point is that in the GE2 distributor, there is a tower going from the internal coil to the distributor cap. I cut that off just to make sure the spark doesnt go anywhere it shouldnt:

img-274526-5-dsc004204yc.th.jpg

I also of course had to drill into the distributor cap to put the 'power tower' in to allow for the external coil. ;)

Thanks all for the inspiriation of doing this. The GE1s were very successful, I had to try a GE2. Remember, this is just a guide, it all worked for me. I can not be hold responsible for any mistakes or anything that doesnt work. Thanks again all. :smile:

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For the HEi Mod on a '94 626 2.5, what vehicle uses the same dist with an external coil? snailman153624 wrote that a KL-ZE dist cap will work. My local parts house can't find anything without a make and model. I've got all my parts gathered for the mod except a dist cap. Can you give more information on what vehicle uses the KL-ZE cap with the external coil prong. Can't seem to locate a power tower either. Thanks

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I completed the Mod on my '93 626 about a month ago. Been running great since. For additional cost savings and to avoid modifying the dist cap, I used a coil for a 78 Bronco (about $15) which has a male post for the coil wire. I ran the coil wire through a small notch I cut in the aluminum disty housing next to the connector. I connected the coil wire to the male coil post on the cap with the standard spark plug end. Works great with no Cap modification.

The ignitor I used was the GM type (I think I asked for a 78 Impala 350 or something like that.).

Now I'm looking for a crank shaft pulley since mine came apart yesterday. I'd never seen that happen before!!!!

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I replaced my ignition module with one I picked up at a pull-your-own parts type of salvage yard. I had a problem with spark still so I switched it back to the old one. I drove it once with the old one on and it acted up worse. I found out that my new cap had burned up so I replaced it and the wires too even though they were new as well. I also put new plugs in. I put the salvage module back in as well it seems to be running good with out any idle problems, but I didn't drive it yet. I'll test drive it later on and post my results. I wouldn't mind doing the mod though, if I still have a problem. But the used module came from a millenia and it only cost me $15 bucks. Just a lil something for anyone who may feel a little uncomfortable cutting wires. Here's some pics from probetalk that may help you take the "disty" apart.... Thanks to Omaha95PGT @Probetalk.com

http://home.comcast....70/z/cams05.jpg

http://home.comcast....z/95disty01.jpg

http://home.comcast....z/95disty02.jpg

http://home.comcast....z/95disty03.jpg

http://home.comcast....z/95disty04.jpg

http://home.comcast....z/95disty05.jpg

http://home.comcast....z/95disty06.jpg

http://home.comcast....z/95disty07.jpg

http://home.comcast....z/95disty08.jpg

http://home.comcast....z/95disty09.jpg

http://home.comcast....z/95disty10.jpg

http://home.comcast....z/95disty11.jpg

http://home.comcast....z/95disty12.jpg

http://home.comcast....z/95disty13.jpg

http://home.comcast....z/95disty14.jpg

__________________

95disty01.jpg

95disty02.jpg

95disty03.jpg

95disty04.jpg

95disty05.jpg

95disty06.jpg

95disty07.jpg

95disty08.jpg

95disty09.jpg

95disty10.jpg

95disty11.jpg

95disty12.jpg

95disty13.jpg

95disty14.jpg

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post-15320-0-56373700-1343793702.jpg

post-15320-0-83223100-1343793702.jpg

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After doing this mod I'm still having intermittent issues with starting & stalling. After replacing the O2 sensor it at least runs better & doesn't stall as much (only stalled once since the O2S has been replaced) & the check engine light hasn't been back on. This Mod does indeed work but I am running it with an internal coil on a '95. The only spark related sensor left to replace is the crankshaft position sensor so I'll go for that next. Has anyone else had issues after the doing this Mod?

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I have a question (i dont have this problem) (yet) but why cant we just replace the dizzy instead of wiring all this shit up? My buddy did it on his probe it worked however it takes awhile to get everything right lol i use premium gas in my 96 626 (klde) 5speed and since ive owned it and put 93 in it made a huge difference

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Mine use to have a misfire after running for an hour letting it sit and starting it back up putting 93 octane fixed this problem almost instantly

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I think i spoje to quickly i dont even know the symptoms of this problem any care to fill me in? Lol

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