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#1
10-06-2009, 12:11 AM
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Tried to hook up 12 volt to HEI
Today I attempted to hook up a 12volt wire to my HEI. I ran a 12 gauge wire to the fuse box hooked the wire to the middle lower accessory switched plug that says IGN beside it. I checked the plug to make sure that the wire is switched on with ignition. Now that I think about it the marking must be for the fuse!? I then attempted to start the car. First crank engine turns over, car been sitting so maybe no gas in carb, I then pump the gas and crank it. Now sounds like no spark, then big puff of smoke from under the hood! Bad day already (see members helping members "97 Yukon help"), just put the yellow wire back the batt connector on the HEI, drove to get some gas and came in the house.
Could I have did any damage? Why did the car not start? Thanks |
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#2
10-06-2009, 04:37 AM
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Don't know what you're working on. You need to see if the ignition terminal is hot with the switch in crank position. If it doesn't, you only had fire when letting on and off the switch from crank. This would make the coil fire once everytime power was cut on and off. That could've made it backfire through the carb and blow smoke.
Chances are nothing is hurt. Just need a non fused wire that's hot in both crank and run positions of the switch. Depending on what you've got, it could take a jumper from IGN 1 to IGN 2 on the switch, or a wire from the starter solenoid R terminal up to coil + terminal (BATT) for cranking. Need more details Check it out and post back
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All the federales say,they could've had him any day They only let him slip away, out of kindness...I suppose Poncho & Lefty |
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#3
10-06-2009, 05:25 AM
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Sounds like Quick hit the nail on the head. Its vital that you have 12V in start and run positions...usually the later model fuseblocks have terminals you can use for that purpose...my '72 GP did anyway. Checked it with a meter and hooked up a nice 10 ga wire and I was good to go. I agree with Quick as far as nothing was probobly hurt. I love HEI's.
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ARROWHEAD ADDICTION: An incureable disease contracted from the pointed edge of classic pontiacmuscle; all consuming, taking over mind, body and soul. |
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#4
10-06-2009, 08:57 AM
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Quote:
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#5
10-06-2009, 09:47 AM
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You would need power to that terminal when you hold it over to the crank position.....JB.
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#6
10-06-2009, 05:15 PM
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"Depending on what you've got, it could take a jumper from IGN 1 to IGN 2 on the switch, or a wire from the starter solenoid R terminal up to coil + terminal (BATT) for cranking."
Does anyone have a picture of IGN 1, IGN 2 on the switch for a 69 GTO? I will attempt to find it later tonight........thanks |
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#7
10-06-2009, 05:57 PM
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If you have a T400, run the wire to where that fuse is. I bought these copper clip that fits around the round fuse and has a spade to put the HEI wire onto.
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74 Formula Below motor destroyed fall of 2023 469, 6X-4's, 72 Intake, Ramair Manifolds. 3 inch exhaust with x-pipe Custom Roller Cam, 1.52 Roller Rockers Quadrajet done by Cliff 3:42 gears 12.061 @ 110.74 12.092 @ 112.43 12.128 @ 111.71 461 stroker Edelbrock 87 cc dport heads Performer RPM Same Ram Air manifolds, and quadrajet 75 Formula 400 / 4-SPD matching numbers 
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#8
10-07-2009, 03:11 AM
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Wire colors is all you need.
HEI hooked to Ignition switch with IGN 1 and IGN 2 jumped together, will make this work like factory. IGN 1 is the black with pink stripe wire and IGN 2 is the yellow wire plugged in the ignition switch, under the dash, on top of the column.
The section of resistance wire is in the harness right before the firewall bulkhead connector. So I like tieing the HEI wire in close to the switch. Spliced to black/pink, yellow, or tie all three together. Ignition terminal in fuse box doesn't keep 12 volts on it. It gets power through a pink wire from the same place as IGN 1. With IGN 1 and IGN 2 spliced together, ignition terminal in fuse box does keep power on it. Just one problem, It's feedback through the resistance wire, so you don't get full voltage. That's the reason for hooking the HEI wire in close to or at the ignition switch.
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All the federales say,they could've had him any day They only let him slip away, out of kindness...I suppose Poncho & Lefty Last edited by "QUICK-SILVER"; 10-07-2009 at 03:27 AM. Reason: A little extra info |
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#9
10-31-2009, 01:54 PM
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12 volts?
I tried to check the voltage out put for the battery feed to the distributor, I had the key turned forward and used an multimeter to try to determaine the output. It read 12.07 volts. Is this reading correct?
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#10
10-31-2009, 02:09 PM
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Quote:
__________________
ARROWHEAD ADDICTION: An incureable disease contracted from the pointed edge of classic pontiacmuscle; all consuming, taking over mind, body and soul. |
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#11
10-31-2009, 02:15 PM
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Quote:
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#12
10-31-2009, 02:17 PM
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Mook, please call M&H fabricators, they know what to do, i sent my wiring harness ti them, illiminated the voltage regulator, and went with one built into my alt. redid everything for a really low price i thought. Hope this thought helps you out. P.S. they also will explain why to never go to the fuse box like your doing!!
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#13
10-31-2009, 02:20 PM
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Start with the Key Off
Turn the Key to ON aka Run Position...check voltage..should be 12V Turn Key Farther to The Crank or Start Position and Hold...you may need to use alligator clips on the ends of the meter probes so you can have use of your hands...should have 12V ...You need to have 12V in On AND Crank Positions.
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ARROWHEAD ADDICTION: An incureable disease contracted from the pointed edge of classic pontiacmuscle; all consuming, taking over mind, body and soul. Last edited by Pontiacmuscle; 10-31-2009 at 02:22 PM. Reason: TMI |
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#14
10-31-2009, 02:30 PM
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#15
10-31-2009, 03:41 PM
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#16
10-31-2009, 03:57 PM
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Mook Im certainly no expert and Ive converted quite a few of my Pontiacs to HEI, never having an issue and I'm only going from memory on this point...that it isnt good for the module in the HEI to have more than 12 Volts run through it for any length of time...I believe I read that on here somewhere actually. I do not know the specs on the module or how much voltage it can handle, I'm sure someone who knows better can chime in on that point. Sorry I cant be more help; Id really hate to see you fry the module though...Again, I'm only going by memory so I may indeed be mistaken.
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ARROWHEAD ADDICTION: An incureable disease contracted from the pointed edge of classic pontiacmuscle; all consuming, taking over mind, body and soul. Last edited by Pontiacmuscle; 10-31-2009 at 03:59 PM. Reason: word change |
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#17
10-31-2009, 04:07 PM
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Quote:
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#18
10-31-2009, 04:32 PM
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HEI doesn't have or use any kind of resistance wire. So running system voltage is absolutely normal and wont hurt a thing. Battery volts with key on engine off and alternator output volts with engine running. Same thing every thing else on the car gets.
Sounds to me like you're good to go.
__________________
All the federales say,they could've had him any day They only let him slip away, out of kindness...I suppose Poncho & Lefty |
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#19
11-01-2009, 03:12 AM
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Thanks for straightening me out Quick...
__________________
ARROWHEAD ADDICTION: An incureable disease contracted from the pointed edge of classic pontiacmuscle; all consuming, taking over mind, body and soul. |
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