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 Need info and tips for HEI Mod 
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Post Need info and tips for HEI Mod
Hey everyone, title pretty much says it all. i wanna do an external coil hei mod on my car. what do i need. what do i take it out of and what are some tips for doing it. thanks alot! and no i could not find anything with the search.

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September 18 2011, 8:12 PM
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Location: Trenton ON.
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Post Re: Need info and tips for HEI Mod
Check V6 FAX. Like here. viewtopic.php?f=23&t=53706

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September 19 2011, 11:31 AM
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Post Re: Need info and tips for HEI Mod
Ohhh thats perfect! thank you! yah i searched for a good hour before i posted, i just truely suck with the search thing. not my cup of tea lol. You wouldnt happen to know what vehicle i can get the module out of? and where exactly is it located? LOL! thanks

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September 20 2011, 11:59 AM
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Post Re: Need info and tips for HEI Mod
1980 Chevetts had the module. http://www.rockauto.com/catalog/raframecatalog.php Some thing like this part. STANDARD MOTOR PRODUCTS Part # LX301
I got mine for like $12 delivered from a guy on Ebay.

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2004 Subaru WRX Silver, stage 2, minty interior.
2002 Subaru WRX Blue, SOLD (best E test numbers I've ever seen)
94 MX-6. Sold
92 GS KLZE 5 Speed
96 GS 5 speed, KLZE, Sold
95 GS Minty Shape Sold
92 GS Sold
92 GS Parts Car scrapped.
Feedback viewtopic.php?f=37&t=66348" onclick="window.open(this.href);return false;
7477th member.

I know you believe that you understand what you think I said but I'm sure you realize that what you heard is not what I meant.


September 20 2011, 1:24 PM
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Post Re: Need info and tips for HEI Mod
oh okay awesome, gunna call some junk yards n see if they got any first. my car keeps just dieing on me as im driving so i dont got 2 weeks to wait for it to come off ebay. thanks though!

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September 20 2011, 6:27 PM
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Post Re: Need info and tips for HEI Mod
Hey, got another question and problem lol. So i did the HEI mod. works effing awesome! fires up n idles so smooth now. BUT!!!!! when i drive it and just hammer on it through 1-2-3. at around 5800-6000rpms, it seems to start sputtering and i lose power, but if i dont put the pedal to the metal and just keep it almost there, it wont do it. It didnt do this before the mod. what could this be? thanks! :shrug:

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September 27 2011, 11:51 AM
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Post Re: Need info and tips for HEI Mod
did u use the junk yard module or a new one and make sure u put the coil wire nice and tight in the coil it self cuz some times it would be in but not all the way so when u are at wot the spark needs to be great but cant be . i had that exact same problem cuz its not ur wiring cuz it wouldnt fire up has to be that .

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September 27 2011, 3:10 PM
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Post Re: Need info and tips for HEI Mod
I used a junk yard module. i guess thats it then. and i didnt install a coil. just the module cause mine in my car went on me.

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September 27 2011, 5:43 PM
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Post Re: Need info and tips for HEI Mod
anyway to check if my module is shot? like with out going and buying another? thanks! Got 0 spark coming out of the spark plug wire. replaced disty, cap, rotor. everything that i can think of. plug wires r brand new pretty much.

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October 17 2011, 9:30 PM
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Post Re: Need info and tips for HEI Mod
do the external coil mod as well as the HEI it will save head aches in the future, i had the SAME prob with my MX-6...did the HEI mod it sputtered blah blah and just died, then replaced hei..still nothing no spark at all, the did the external coil mod and it ROARED back to life it was amazing...just make sure u have FANTASTIC grounds that is one of the most important parts of the whole mod.... :freak:

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March 13 2012, 1:40 PM
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Post Re: Need info and tips for HEI Mod
hahahah yah man. ended up being my coil in the end. went through 4 months of hell figuring it out :P. went with the hei module. wired it, fixed it for a night. the next day it wouldnt start again. so i thought maybe the module went cause it was from a 70s chevy. replaced it, still nothing. bought a new disty, still nothing. re-wired it like 3-4 times thinking i effed up somewhere. replaced crank angle. then after i gave up my cousin came with his multimeter and first thing he tried, coil on the new disty. read .99 ohms. (it was supposed to be brand new 11.5-18ohms or something.. wasted 250 bucks on that) went on kijiji posted i needed a coil and what not. got a coil for 20 bucks and a power tower n wire for 16. wired it up with my new module and walla. she fired right up. i felt like such a retard but live n learn i guess.


PROBLEM WAS FIXED! If you get any symptom of no spark, go straight to your coil before anything. test the 2 outter prongs on the 3 plug.(leave the middle one alone)

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March 14 2012, 11:09 AM
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