Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729452
06/20/10 04:54 PM
06/20/10 04:54 PM
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Joined: Apr 2003
Posts: 12,237 Looking for a way out of Middl...
IMGTX
I Live Here
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I Live Here
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Looking for a way out of Middl...
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The male terminal looks like this. ![](http://happyterminals.com/images/56%20male.gif) If you use a pair of needle nose pliers to squeeze it narrower and it will then slide out. and this is the female. ![](http://happyterminals.com/images/56%20female.gif) You will need to stick a small screwdriver/metal stick to depress the tab shown on the bottom of the picture. It will then slide out. they are available at Napa or at www.happyterminals.com Hope it helps. Now the reason that wire burnt may very well be from too much current flow to the coil/ignition system. You don't get more power out without more power in. You may want to use a relay to power the ignition system.
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Re: Car Quit In The Parking Lot: HELP
[Re: IMGTX]
#729453
06/20/10 06:23 PM
06/20/10 06:23 PM
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Joined: Sep 2004
Posts: 2,093 oberlin, Ohio
Rapid340
top fuel
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top fuel
Joined: Sep 2004
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oberlin, Ohio
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Capacitive discharge ignition systems don't require a ballast resistor. (They may talking about running with their CD ignition box).
1971 Factory Appearing Duster 340 11.000 @ 122 mph
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Re: Car Quit In The Parking Lot: HELP
[Re: Rapid340]
#729454
06/20/10 08:17 PM
06/20/10 08:17 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
OP
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OP
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I replaced the blue wire that was burned and I made some voltage checks: Key @ RUN: Bat: 12.8v Coil +: 11.9v ECU: both terminals 12.0v Dist Connector: 1.85v Cranking: No visial spark from coil wire NO START. It did not even try to fire. I pulled my dist cap and all of the tips looked clean. I am plannin on putting on my old Orange MP ECU and try to restart, but not until tomorrow night. Any other suggestions are appreciated. Thanks
Last edited by YO7_A66; 06/20/10 08:40 PM.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729455
06/20/10 09:57 PM
06/20/10 09:57 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
I Live Here
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I Live Here
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MP distributors use stock pickups. That's behaving like one marginal and then dying. If you have a factory service manual I believe this can be tested.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Car Quit In The Parking Lot: HELP
[Re: jcastle1]
#729457
06/21/10 06:25 AM
06/21/10 06:25 AM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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I am using the FBO distributor/ECU with the Mallory e-coil. ""MP distributors use stock pickups."" When I tested the distributor connector when the key was at the RUN position, I only got 1.85v. What voltage should I be getting at the dist pickup at the RUN position? Is it 12v or is it resisted down? I have the appropriate voltage to all of the key components as shown above except at the distributor connector. I believe the problem is either the coil or the ECU. I still have no spark from the coil wire to the top of the distributor.
I swapped out to the MP electronic ignition kit many years ago so my ignition harness is not a 70 unit. Does anyone have a diagram that shows what the blue wire (burned one in my picture) goes to on the MP ignition harness? My 70 manual shows it going to the dash lights and the key-in buzzer. Thanks
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729458
06/21/10 09:38 AM
06/21/10 09:38 AM
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Joined: Jan 2004
Posts: 755 Tempe, AZ
loco340cuda
super stock
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super stock
Joined: Jan 2004
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Tempe, AZ
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Do you have another ECU you can try? I have had a few go bad and they quit working pretty quickly. The first one I had go bad the car started to act up like it was missing a little when I was driving it. I got it home and shut it off. I tried to start the car and had a hard time getting it to start and when I did it would not idle on it own and sounded like it was really out of tune. After two times of starting and dieing the car would not start anymore. I swapped out the ECU and the car fired right up without any more problems. The second one I had go bad was like a light switch. I had driven the car for a couple of years with the ECU box and after a drive one day I parked the car. A couple of days later I go out to the garage to start the car and it would not fire up. After some trouble shooting I figured out it was the ECU box. With the new ECU the car fired right up. So given my past experiences I would try the ECU first. If that does not fix it then it sounds like it is the coil. ![](/ubbthreads/images/graemlins/Twocents.gif)
70 Cuda 340 4 speed - now stroked to 416ci (SOLD) 2017 Mustang Shelby GT350
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Re: Car Quit In The Parking Lot: HELP
[Re: loco340cuda]
#729459
06/21/10 09:51 AM
06/21/10 09:51 AM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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Loco, Both of those issues sounds just like what happened over the weekend. I do have a spare MP Orange ECU that I will test tonight after I do a resistance check on the pickup coil. Thank you.
Can anyone confirm what the voltage at the pickup coil should be at the RUN position? Is it 12v or is it resisted down?
Thanks to everyone.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729460
06/21/10 12:12 PM
06/21/10 12:12 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
I Live Here
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I Live Here
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The test I'm remembering (and it's been a very long time) is for resistance through the pickup. Not voltage.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Car Quit In The Parking Lot: HELP
[Re: moper]
#729461
06/21/10 12:26 PM
06/21/10 12:26 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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David, I found a spec of 150-900ohms thru the pickup coil (which I am going to check tonight), but I was wondering what the voltage would be coming to the pickup coil with the key at RUN just so I can confirm that too. I guess I will know if it starts up that it had enough voltage. ![](/ubbthreads/images/graemlins/smile.gif) I have 12v going thru two of the pins at the ECU harness but only 1.85v is coming from the ECU (I think that is the source) and getting to the pickup. Thanks for the reply,
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729462
06/21/10 01:26 PM
06/21/10 01:26 PM
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Joined: Dec 2007
Posts: 7,759 So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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I don't believe you will not find a spec for voltage going to the pickup coil as the ECU measures a/c voltage generated from the pulses from magnetic distributor pickup.
Last edited by HealthServices; 06/21/10 01:36 PM.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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Re: Car Quit In The Parking Lot: HELP
[Re: HealthServices]
#729463
06/21/10 01:37 PM
06/21/10 01:37 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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OP
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Allen, Thank you for the clarification. ![](/ubbthreads/images/graemlins/thumbs.gif)
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729464
06/21/10 01:46 PM
06/21/10 01:46 PM
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Joined: Jul 2003
Posts: 135
70Fish
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member
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Actually, I might be having some similar issues with my ECU. How do I test that thing out to make sure it's working? Thanks
'70 Barracuda
'94 Harley Davidson FXDWG
Pit Bull named IKE
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729465
06/21/10 01:59 PM
06/21/10 01:59 PM
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Joined: Dec 2007
Posts: 7,759 So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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Here is a diagram that may help you out. Of course you do not have a resistor so it would be just a wire across there.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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Re: Car Quit In The Parking Lot: HELP
[Re: HealthServices]
#729466
06/21/10 02:34 PM
06/21/10 02:34 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
OP
master
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Allen, Thank you very much for the schematic. The burnt wire in the above pictures appears to be the dark blue wire (tracer) #23. I bypassed the bulkhead and wired the two #23's together for the short term as both sides of the bulkhead terminals were damaged. In my above pictures, there is a green wire right beside the burnt blue one. The schematic that you posted does not show a green wire in the #24 position. Does this just mean that my harness may be a little older/newer than your schematic? I need to trace it just to see where it goes. Thanks again,
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729468
06/21/10 06:12 PM
06/21/10 06:12 PM
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Joined: Dec 2007
Posts: 7,759 So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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Quote:
In my above pictures, there is a green wire right beside the burnt blue one. The schematic that you posted does not show a green wire in the #24 position. Does this just mean that my harness may be a little older/newer than your schematic? I need to trace it just to see where it goes.
Engine side goes to horns, pass side goes to horn relay, sometimes all that extra wiring gets people confused so i just blank it out.
Last edited by HealthServices; 06/21/10 06:22 PM.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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Re: Car Quit In The Parking Lot: HELP
[Re: Mopar_Country]
#729469
06/21/10 06:16 PM
06/21/10 06:16 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
OP
master
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OP
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MC: Yes and thank you.
UPDATE: I checked the resistance at the coil pickup and it read 282ohms which is in the range that I found of 150-900ohms. Then I replaced the ECU with my spare and no change, no spark from the coil wire. Then I took both ECU's to my local parts store and they tested each one 6 times and they were both tested as good parts. Is my coil fried? I checked the resistance across the pos/neg terminals and it read .4ohms. ??? Thanks again,
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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