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Re: 72 challenger 340 no spark issue! [Re: RapidRobert] #459958
09/08/09 12:36 AM
09/08/09 12:36 AM
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Menomonie,wi
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could u show or draw me what your talking about?
thanks!

Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459959
09/08/09 09:35 AM
09/08/09 09:35 AM
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Go onto the "tech archives" at the top of the page then click on "electrical topics" then click on "awesome ecu wiring diagram" & they have a comprehensive schematic that will help you better than I can explain it but the yellow wire on the diagram is wrong, you run that yellow wire from the (st) terminal on the ign sw out to the starter relay and it does not connect to the ballast.


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Re: 72 challenger 340 no spark issue! [Re: RapidRobert] #459960
09/08/09 10:04 AM
09/08/09 10:04 AM
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So Is that the same yellow that is all melted coming out of my harness bulkhead then? just make a new one off that connector and reconnect to ign terminal on relay where it was?

Last edited by menomoniemopars; 09/09/09 12:37 PM.
Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459961
09/09/09 12:36 PM
09/09/09 12:36 PM
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How do u get the old terminal out of bulkhead? I have a extra harness from a 74 challenger and will just use that yellow wire..thanks!

Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459962
09/09/09 02:45 PM
09/09/09 02:45 PM
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on the male terminals one end will compress & one wont & you slightly compress the one that will move just slightly then it will come out the back side easily. The female ones look at the rectangular hole and on one side there is a mini groove & use an eyeglass screwdriver to go in & depress the tab then pull it out the back side also.


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Re: 72 challenger 340 no spark issue! [Re: RapidRobert] #459963
09/09/09 07:47 PM
09/09/09 07:47 PM
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Thank you! I will give it a shot saturday...

Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459964
09/13/09 12:25 PM
09/13/09 12:25 PM
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well went back and worked on the car and I got it running but I found some cluster crap in harness, and I have included a pic of what someone did.. can u guys take a look and see what they did is ok? tx! Its running ,but need to tweak rotor placement etc now and then go from there..

5479804-wiring.jpg (41 downloads)
Last edited by menomoniemopars; 09/13/09 12:28 PM.
Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459965
09/13/09 12:29 PM
09/13/09 12:29 PM
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here is the power acc relay? that the one blue wire goes back to from previous pic.

Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459966
09/15/09 07:06 AM
09/15/09 07:06 AM
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No opinions on the above pics?

Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459967
09/15/09 07:40 AM
09/15/09 07:40 AM
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Swap in a known good working distributor. My friends 440 was doing the same exact thing. The Pickup in his reman distributor came loose.

Re: 72 challenger 340 no spark issue! [Re: 440challenger] #459968
09/15/09 08:48 AM
09/15/09 08:48 AM
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Quote:

Swap in a known good working distributor. My friends 440 was doing the same exact thing. The Pickup in his reman distributor came loose.




This is a brand new dist tho..

Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459969
09/15/09 08:59 AM
09/15/09 08:59 AM
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Quote:

No opinions on the above pics?


I am not able to tell from the pics. I would check out the ECU wiring diagram in the archives and checkout the 71 Challenger wiring diagrams on www.mymopar.com then click on mymopar tools/reference then click on wiring/electrical.


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Re: 72 challenger 340 no spark issue! [Re: RapidRobert] #459970
09/16/09 01:05 PM
09/16/09 01:05 PM
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I have that same wiring diagram at my brother's ,but its not clear on the wiring for the ign module? it only shows 3 wires? and two of them are going to something i never heard of speed switch? whats that?

Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459971
09/21/09 08:07 AM
09/21/09 08:07 AM
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well Haven't had a chance to get back to it.. Maybe this week sometime

Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459972
09/23/09 07:22 AM
09/23/09 07:22 AM
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We'll I think this Damn thing is useless at this point! it still will not run very well! I have it at 30 initial now just so it will run! Unknown on cam specs etc, And to top it off there is a damn knock somewhere in this motor! its towards the center sounds like? it doesnt go away when u rev it a little, i pulled all but the last two plug wires on drivers side as there a bitc* with headers and it didnt go away. so thinking no rod bearing. could be a main? or what else do u guys think? this motor was suppose to have been all rebuilt too! But after everything i have seen so far with the seller i wouldn't doubt he put used fricken bearings back in!! also when i pulled the drivers side valve cover to make sure both valves were closed At TDC I seen this on a couple of pushrods. this is the worse one u can literally feel a nice deep groove in it! where did that come from? I watched it roll over and it doesn't even come close to hitting way up ther ein the pushrod hole. Also how close should the pushrod be when valve is closed to that hole? cause its very close!
p.s Is there anyone close to me that can come look at this for me? thanks!!

5500269-Pushrod.jpg (29 downloads)
Last edited by menomoniemopars; 09/23/09 10:17 AM.
Re: 72 challenger 340 no spark issue! [Re: menomoniemopars] #459973
09/25/09 08:47 PM
09/25/09 08:47 PM
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Is there anyone close by that can stop by and listen to this car to help me decide what I need to do?

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