I'm confused. I always thought that it was just one wire from the starter... Never really looked at it but what I assumed... 
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
My '70 C/10 - The Rat Bastard... [Won't Idle.]
- Thread starter TheBeast_88K5
- Start date
TheBeast_88K5
Banned
I meant that I just didn't want to route another long wire.
When I could just as easily run a short one that you'd never see.
From the ignition switch to the "S" post on the starter, is just the purple wire.
My "bat" post (on the starter) has the Battery wire, Alternator bypass wire, and Fuse panel lead.
I'm running a CS-144, hence the bypass.
When I could just as easily run a short one that you'd never see.
From the ignition switch to the "S" post on the starter, is just the purple wire.
My "bat" post (on the starter) has the Battery wire, Alternator bypass wire, and Fuse panel lead.
I'm running a CS-144, hence the bypass.
I forgot you have the ez wire harness.
Now the lingering question in my mind is-
Did he wire the ignition switch correctly?
The reason I ask is because I have Ez wire harness for my nephew's blazer. It's not running, but I do know the harness has a plug for column mounted ignition switch.
I do believe the 72 has a dash mounted ignition switch and it would take a different plug.
So I'm thinking, you had to change the plugs and in doing so did not wire it right.
That why I ask if you had voltage during cranking. A relay is not going to do any good if it not activated during cranking.
But thats is all moot if you said you are getting a weak spark during cranking.
With a relay, you ....
Hold on.
How did you wire the relay?
It is possible for you probably wire the relay to be an inline resistor.
This is how you could do it.
Pink ignition wire to 85 or 86.
Wire going to HEI to 86 or 85
Bat + to 30 or 87.
ground to 87 or 30.
No, that is not right. As soon you send power through the relay, The Bat + would go straight to ground and you would release the magic smoke from the wiring.
A voltage drop test would show something wrong.
But to be sure. You would wire the relay like so,
Bat + to 30.
HEI to 87 .
pink ignition wire to 86.
ground to 85.
Now the lingering question in my mind is-
Did he wire the ignition switch correctly?
The reason I ask is because I have Ez wire harness for my nephew's blazer. It's not running, but I do know the harness has a plug for column mounted ignition switch.
I do believe the 72 has a dash mounted ignition switch and it would take a different plug.
So I'm thinking, you had to change the plugs and in doing so did not wire it right.
That why I ask if you had voltage during cranking. A relay is not going to do any good if it not activated during cranking.
But thats is all moot if you said you are getting a weak spark during cranking.
With a relay, you ....
Hold on.
How did you wire the relay?
It is possible for you probably wire the relay to be an inline resistor.
This is how you could do it.
Pink ignition wire to 85 or 86.
Wire going to HEI to 86 or 85
Bat + to 30 or 87.
ground to 87 or 30.
No, that is not right. As soon you send power through the relay, The Bat + would go straight to ground and you would release the magic smoke from the wiring.
A voltage drop test would show something wrong.
But to be sure. You would wire the relay like so,
Bat + to 30.
HEI to 87 .
pink ignition wire to 86.
ground to 85.
TheBeast_88K5
Banned
This truck has taken the wind out of my sails.
Im disgusted with it, and all the time Ive wasted on it.
Every used part failed, successively.
The harness was nothing but a pain in the ass.
The motor fired a couple of times.... Cool.... Like that matters.
Not like the gawdamned boat anchor aint full a rust any ways.
But, now the b*tch wont fire...
Doesnt even feign the f*cking notion of firing.
Just spins and spins.
Ive done everything I could think of.
She just wont have any of it.
Im at the "put a cover on it and forget about it" phase of this gawdamned travesty.
Ive replaced 4 starters.
3 batteries.
All the cables.
Ran 9 new major grounds.
Voltage drop tested everything.
Checked all my wiring more times than I care to remember.
Bought a new dizzy.
Eliminated the MSD.
Ran a relay to ASSURE the HEI gets 12v.
A bunch of other stuff, too.
Im disgusted with it, and all the time Ive wasted on it.
Every used part failed, successively.
The harness was nothing but a pain in the ass.
The motor fired a couple of times.... Cool.... Like that matters.
Not like the gawdamned boat anchor aint full a rust any ways.
But, now the b*tch wont fire...
Doesnt even feign the f*cking notion of firing.
Just spins and spins.
Ive done everything I could think of.
She just wont have any of it.
Im at the "put a cover on it and forget about it" phase of this gawdamned travesty.
Ive replaced 4 starters.
3 batteries.
All the cables.
Ran 9 new major grounds.
Voltage drop tested everything.
Checked all my wiring more times than I care to remember.
Bought a new dizzy.
Eliminated the MSD.
Ran a relay to ASSURE the HEI gets 12v.
A bunch of other stuff, too.
if I wasn't 3000 miles away I'd get it running tomorrow for ya...
sometimes it's fresh eyes that help... easy to lose perspective on something you've staring at a long time..
has the spark changed? pull one of the fresh plugs... put an old one in it's hole... hook the plug wire to the pulled plug, ground it and spin for spark... not the screwdriver test...
it's gonna be something stooopid.. something your just assuming is ok..
sometimes it's fresh eyes that help... easy to lose perspective on something you've staring at a long time..
has the spark changed? pull one of the fresh plugs... put an old one in it's hole... hook the plug wire to the pulled plug, ground it and spin for spark... not the screwdriver test...
it's gonna be something stooopid.. something your just assuming is ok..
TheBeast_88K5
Banned
It has to be something I missed, because Ive checked it all.
I did the screwdriver test, earlier.
Spark looked a lot better...
I did the screwdriver test, earlier.
Spark looked a lot better...
like I said.. don't assume, it get's you in trouble... 
the screwdriver test isn't what your plugs are doing, thus why I said what I said....
if the plug sparks ok, don't even give it gas next time, give it a shot of ether... if it doesn't try to light with that, there's a cylinder/valve timing issue..
the screwdriver test isn't what your plugs are doing, thus why I said what I said....if the plug sparks ok, don't even give it gas next time, give it a shot of ether... if it doesn't try to light with that, there's a cylinder/valve timing issue..
Buy an actual spark tester. What's one cost? Five bucks?
Martin
Martin
Also, why would the engine be full of rust???
Martin
Martin
whoa, missed that...
I own many spark testers myself.. (personally, I love the "lay on the wire one", how freakin convenient is that?!??!!) and generally they serve the purpose to check for some/any spark... but there is something to be said for the method I mentioned.. it accounts for plug gap your trying to run, condition, etc...
TheBeast_88K5
Banned
I meant the rusty walls, in the coolant passages.
I am going on the road tomorrow so when I get back I'll swing by and see if I can help
chulisohombre
1/2 ton status
Wow. Seems like you've eliminated all that you can be having trouble with. Only four major things. Fuel compression fire exhaust. Something small just overlooked possible. Have you tried starter fluid? Plugs wet or dry after turning over? I hate when this kind of thing happens.
I don't know enough to give much input, but I really thought the coil was going to be your fix. Good luck Mike I really don't want you to give up on this truck.
TheBeast_88K5
Banned
Im not giving up..... Yesterday was just a bad day.
Very frustrating, to say the least.
Today, Ill be starting at "A" and working my way to "Z".
I'll find the problem.
Its either gonna be REAL stupid, or Mechanical failure.
Either way, my wife was pleading with me to just do an LS swap.
It got kinda funny.
At one point she said,
"I know you want this monster Big Block, but wouldnt an LS make more sense, anyway?"
Very frustrating, to say the least.
Today, Ill be starting at "A" and working my way to "Z".
I'll find the problem.
Its either gonna be REAL stupid, or Mechanical failure.
Either way, my wife was pleading with me to just do an LS swap.
It got kinda funny.
At one point she said,
"I know you want this monster Big Block, but wouldnt an LS make more sense, anyway?"
Either way, my wife was pleading with me to just do an LS swap.
It got kinda funny.
At one point she said,
"I know you want this monster Big Block, but wouldnt an LS make more sense, anyway?"
and then I woke up...
TheBeast_88K5
Banned
No... It really happened.
She's sick of hearing me complain, and she wants me happy.
Next year... Next year.
After I pay off all my bills and such.
Reliability, Fuel Economy, and less headache.
I'll be dropping it off at a shop, tho.... I want it nice.
I just dont have that urge to make everything look good.
I'm very much an Aries, in that I want it done, now.
*At the expense of looks, from time to time.
Monster Big Block? It's just a little 402 not?
Martin
Martin
LS swap is easier? It doesn't get much simpler than one of these old carb engines...
