Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729471
06/21/10 06:46 PM
06/21/10 06:46 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 would call up mallory for that spec since the coil has a internal resistor.
Seems a really low.
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]
#729472
06/21/10 07:08 PM
06/21/10 07:08 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
OP
master
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OP
master
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Posts: 5,444
Indiana
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Health, http://www.summitracing.com/parts/MAA-30450/ 3) .4 ohms 4) 9.1 kohms 5) 9.1 kohms I have a question for you with the RUN voltage at the ECU. I turned the key to the RUN position and then I took voltage readings at the ECU harness and I only found 12v at the #1 position. Is this correct? Thank you for your help.
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]
#729473
06/21/10 07:32 PM
06/21/10 07:32 PM
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Joined: Apr 2010
Posts: 1,216 Under My Car
Mopar_Country
pro stock
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pro stock
Joined: Apr 2010
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Under My Car
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The list I have gives no readings for that coil for some reason, maybe because it is the epoxy series coil. Some of the other numbers I have are right in line with what you are showing.
The voltage at the ECU should be at least 8v in the run position and within .5v of the battery voltage when cranking.
I'm beginning to wonder if it might be the pickup in the dizzy.
Last edited by Mopar Country; 06/21/10 07:43 PM.
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Re: Car Quit In The Parking Lot: HELP
[Re: YO7_A66]
#729474
06/21/10 07:49 PM
06/21/10 07:49 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:
I have a question for you with the RUN voltage at the ECU. I turned the key to the RUN position and then I took voltage readings at the ECU harness and I only found 12v at the #1 position. Is this correct?
It should be battery voltage but some lost is normal. 12 volts is not going to prevent you from starting the car. To check and see if you have voltage when cranking, (yes run voltage is off when cranking) remove the starter signal wire (should be the yellow wire) to the relay for testing purposes, then turn the key to crank and read the voltage.
Last edited by HealthServices; 06/21/10 08:03 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]
#729475
06/21/10 08:18 PM
06/21/10 08:18 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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Posts: 5,444
Indiana
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My bat is wearing down a touch but voltage at the coil and at the #1 ecu were both at 11+ volts at cranking.
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]
#729476
06/21/10 08:25 PM
06/21/10 08:25 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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Well it looks like your issue is one of 4 things...
coil (you are checking the spark at the coil not the plug so the rotor, cap and wires ares not currently the issue)
distributor (as in pickup)
ECU
Or wiring between the three (or ground) but not back to the firewall since you have voltage in the crank and in the run positions at the coil.
You mention you had the ECUs checked.
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]
#729478
06/21/10 10:16 PM
06/21/10 10:16 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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OP
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Joined: Jan 2003
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Health: Yes on the two ECU's tested at the store, coil and ECU are getting correct voltage at RUN and CRANK. I have not tested the wiring from the ECU back thru to the firewall though. I better put that on my list, but I am assuming that it is good since the ECU and Coil are getting the required voltage. Thank you very much, MC, The pickup coil was checked at 282ohms. ""crank the engine if the distributor is in, spin the shaft if it is out."" Can you please explain this for me? Thanks I need to check the reluctor gap. It has been a while since I did this. Thank you very much,
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: Mopar_Country]
#729480
06/21/10 11:09 PM
06/21/10 11:09 PM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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OP
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I understand now. I thought that the lower the resistance the better. I am done tonight but I will buy a new pickup coil tomorrow on my way home from work just in case the AC is too low. I need to spin the motor by hand and watch to make sure the dist rotor is moving too. It appears that I need to focus on the internals of the dist tomorrow night. Thanks a bunch.
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: HealthServices]
#729483
06/22/10 06:32 AM
06/22/10 06:32 AM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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OP
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MC & HS: The pickup coil should be cheap and they are on my way home. Tonight's hit list: check the new pickup coil for resistance rotate motor to see if dist moves spin dist for existing AC voltage check existing pickup/reluctor gap replace pickup coil if bad
Thank you very much.
Note: I can pickup this MP804 at my local NAPA and have it with me if I need it. I know that the picture is a tad off but I will inspect the new part for the 90 degree mounting tabs before I buy it.
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: Mopar_Country]
#729485
06/22/10 08:03 AM
06/22/10 08:03 AM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
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Thank you again MC. I just read an article that explained the workings of the ignition systems for guys like me who are trying to understand it. This is a simple description of what it read: Motor turns distributor shaft Reluctor spins with distributor shaft which activates the pickup coil Pickup coil sends signal to ECU (every time one of the 8 reluctor points pass by the pickup coil) ECU sends signal to coil Coil sends signal to top of distributor cap Cap sends signal to plug wires Since I have voltage at the ECU and at the Coil during the RUN and the START circuits, but I have no spark at the cap, then it is starting to make sense that the trigger (pickup coil) is not telling the rest of the ignition system what to do, as long as the distributor is moving with the engine. I love this stuff!! Thanks to all again. I will report back as soon as I get a chance to test the distributor.
Last edited by YO7_A66; 06/22/10 09:03 AM.
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Re: Car Quit In The Parking Lot: HELP
[Re: CANDK]
#729487
06/22/10 10:53 AM
06/22/10 10:53 AM
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Joined: Apr 2010
Posts: 1,216 Under My Car
Mopar_Country
pro stock
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pro stock
Joined: Apr 2010
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Under My Car
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Quote:
You can also unplug your dstributor, and then remove the cap, noting where the rotor is pointing. Crank the car over for a second, and walk back over and see if distributor has rotated etc. I actually have the exact same issue that you do currently, and have tested and double-checked everything to arrive at the same point you are today! I am planning on getting a new reluctor in my dist this afternoon, but since I'm on the west coast, I hope you're up and running before I get home from work! At least that would give me some light at the end of the tunnel!
Are you sure its your reluctor, or is it the pickup coil?
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Re: Car Quit In The Parking Lot: HELP
[Re: Mopar_Country]
#729488
06/22/10 11:32 AM
06/22/10 11:32 AM
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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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Dave, The pickup as sold is just the pickup... Not the plate it clips in to witht he 90° tabs for the screws. The picture is correct. You push the pickup's plate down, remove the flat spring clip underneath the main plate, then replace the pickup.
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]
#729489
06/22/10 11:39 AM
06/22/10 11:39 AM
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Joined: Jan 2003
Posts: 5,444 Indiana
YO7_A66
OP
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OP
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David, Thanks for the heads up.
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)
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