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Author Topic:   Distributor Problem!
BobbyR
Journeyman

Posts: 28
From: Brentwood, CA USA
Registered: Jun 2002

posted 10-15-2002 12:32 PM     Click Here to See the Profile for BobbyR   Click Here to Email BobbyR     Edit/Delete Message   Reply w/Quote
I have a 1979 351W in a 1970 Fastback everything was running fine then she started popping a little then nothing.I have a MSD 6al box, power is sparking from the coil (useing the white wire to and from ground). The distributor is the big cap Duraspark. I don't get any current to the plugs. All my connections are correct and working. Any suggestions?

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Moneymaker
Administrator

Posts: 19611
From: Lyons, IL, USA
Registered: May 99

posted 10-15-2002 12:45 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
See if you get any spark between the cap and coil wire? Also between the cap and plug wires. You may have a cracked or burned cap.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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BobbyR
Journeyman

Posts: 28
From: Brentwood, CA USA
Registered: Jun 2002

posted 10-15-2002 01:04 PM     Click Here to See the Profile for BobbyR   Click Here to Email BobbyR     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Moneymaker:
See if you get any spark between the cap and coil wire? Also between the cap and plug wires. You may have a cracked or burned cap.


I have just replaced cap, rotor, and wires so that has been eliminated. What about the distributor? How do you tell if that is working properly?


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mustangzrule
Journeyman

Posts: 87
From: Orion, MI
Registered: Sep 2002

posted 10-15-2002 01:39 PM     Click Here to See the Profile for mustangzrule   Click Here to Email mustangzrule     Edit/Delete Message   Reply w/Quote
No spark to the plugs means something wrong between the coil where you are getting a spark??? and the plug where you are not.

The only items between them are the wires, cap, and rotor. If these are replaced, then something is wrong with them.

The ??? above is whether you actually got a spark from the coil or you are just getting a signal TO the coil. If no spark from coil (and this makes sense) then your coil is bad. Replace the coil.

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RonnieT
Gearhead

Posts: 540
From: Port Allen, La. 70767
Registered: Jun 99

posted 10-15-2002 09:07 PM     Click Here to See the Profile for RonnieT   Click Here to Email RonnieT     Edit/Delete Message   Reply w/Quote
The way you are saying you checked for spark by grounding the white wire says that the MSD Box and coil is working, if you connect everything back up and spin the motor over and do not get a spark from the coil wire there is something in the system that has failed. I have never ran a MSD/Duraspark combo, but if the stock ford control module is still used in the loop that could be the problem or it could be the pick up in the distributor. I saw a test procedure for the pickup in a manual, but do not remember how it said to test it.

------------------
Ronnie
69 mach1 351W-4V engineless at the time!
70 Torino GT 351C-4v with a "shaker"
Mustangs and More Member #23

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67coupe
Gearhead

Posts: 370
From: dallas NC usa
Registered: Nov 2000

posted 10-15-2002 09:16 PM     Click Here to See the Profile for 67coupe   Click Here to Email 67coupe     Edit/Delete Message   Reply w/Quote
if u dont mind me asking how do u have the duraspark hooked up its been awile but i didnt think u used the white wire for the duraspark it should hook up like a msd dist to the box with 2 wires purple and green i think it was?

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Josh
67 coupe with 351c
94 Explorer
30 model A currently rustbucket
in process 67 convt with efi 5.0 and t5

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BobbyR
Journeyman

Posts: 28
From: Brentwood, CA USA
Registered: Jun 2002

posted 10-16-2002 02:00 PM     Click Here to See the Profile for BobbyR   Click Here to Email BobbyR     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by mustangzrule:
No spark to the plugs means something wrong between the coil where you are getting a spark??? and the plug where you are not.

The only items between them are the wires, cap, and rotor. If these are replaced, then something is wrong with them.

The ??? above is whether you actually got a spark from the coil or you are just getting a signal TO the coil. If no spark from coil (and this makes sense) then your coil is bad. Replace the coil.


I have replaced the rotor, cap, & wires and still no spark, so I believe those are eliminated. Can you have a spark from the coil and still have it not work properly? I have replaced the magnetic device in the distributor but I broke the drive gear so I have not been able to test it yet!

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BobbyR
Journeyman

Posts: 28
From: Brentwood, CA USA
Registered: Jun 2002

posted 10-16-2002 02:26 PM     Click Here to See the Profile for BobbyR   Click Here to Email BobbyR     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by 67coupe:
if u dont mind me asking how do u have the duraspark hooked up its been awile but i didnt think u used the white wire for the duraspark it should hook up like a msd dist to the box with 2 wires purple and green i think it was?


The Duraspark is not hooked up through a module. The purple and green wires from the MSD is connected, via a connector from MSD, to the 3 wire plug from the distributor. The white is use as a kill switch

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BobbyR
Journeyman

Posts: 28
From: Brentwood, CA USA
Registered: Jun 2002

posted 10-16-2002 02:28 PM     Click Here to See the Profile for BobbyR   Click Here to Email BobbyR     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by RonnieT:
The way you are saying you checked for spark by grounding the white wire says that the MSD Box and coil is working, if you connect everything back up and spin the motor over and do not get a spark from the coil wire there is something in the system that has failed. I have never ran a MSD/Duraspark combo, but if the stock ford control module is still used in the loop that could be the problem or it could be the pick up in the distributor. I saw a test procedure for the pickup in a manual, but do not remember how it said to test it.


I am not using the module. MSD straight to the distributor, via a plug from MSD (two wires to 3 wires).

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Moneymaker
Administrator

Posts: 19611
From: Lyons, IL, USA
Registered: May 99

posted 10-16-2002 02:49 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
OOPS! F/L/M dealers stock the gears with a roll pin.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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