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Author Topic:   Engine electrical problem
rockafellz
Gearhead

Posts: 1426
From: San Lorenzo, CA, USA
Registered: Aug 2001

posted 03-09-2003 03:41 PM     Click Here to See the Profile for rockafellz   Click Here to Email rockafellz     Edit/Delete Message   Reply w/Quote
Hey All,

Just got back from a 45 minute cruise in the fastback!!

But something wierd happened twice while out. As I was turning out of my block, my engine cut off completely for about .5 second then automatically resumed as if nothing happened. Then, on my way back to the house as I was pulling from a stop light, the motor died completely (as if spark died and shut down). I shifted it into park and it started right up.

About 90% of my connections to the 6AL were soldered and crimped and the other 10% were just crimped due to R&Ring it with a faulty 6AL. When I got home I took a look at all the connections, gave it a good tug, and they all look tight. Could the MSD be hot? or loose connections inside? MSD tech support also said that I don't need to connect or ground the black wire coming from the duraspark distributor. The orange and purple wire were connected correctly to the 6AL. Could it be a faulty 6AL or Blaster 3 or distributor? I can't make it repeat itself when I want it to, so it's a little hard to pinpoint.

Engine just flat out dies, no sputtering or bogging. Restarts fine and fuel pump is still pumping. If not enough fuel is present, it would sputter and die right?

Thanks in advance.

Erik

------------------
1966 Ford Mustang 2+2
Mine - Restomod in Progress

1966 Ford Mustang Coupe
Dad's - Original Unrestored

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steve'66
Gearhead

Posts: 9104
From: Sonoma,CA,USA
Registered: Mar 2000

posted 03-09-2003 06:53 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Erik,

Good luck with this one. Intermitent electrical problems are the worst.

SteveW

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Hemikiller
Gearhead

Posts: 618
From: Killingworth, CT
Registered: Feb 2002

posted 03-09-2003 07:00 PM     Click Here to See the Profile for Hemikiller   Click Here to Email Hemikiller     Edit/Delete Message   Reply w/Quote
Erik, try checking ALL of your engine to chassis and battery to chassis ground connections. If you don't yet ahve one, make a dedicated strap from the block to the frame rail. I had a similar problem with one of my cars years ago and it was the engine ground (or lack thereof)

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Fastymz
Moderator

Posts: 19583
From: Reno Nv USA MEM#1240
Registered: Apr 2001

posted 03-09-2003 07:23 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
Have you checked the pick up in the dist,I don't know anything about the duraspark system.But I they must go bad too.
Just an idea

------------------
SCOOP
oddly obsessed with big scoops on little Mustangs

2.26 60'S
14.9 @ 90.86MPH

65 coupe,351w,C4,Big Boss 429 hood scoop,8"3.40 TracLoc,Cragar SS,Black Suede.

https://mustangsandmore.com/ubb/Fastymz.html

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CJ
Journeyman

Posts: 31
From: Galloway, OH 43119
Registered: Dec 2002

posted 03-09-2003 09:25 PM     Click Here to See the Profile for CJ   Click Here to Email CJ     Edit/Delete Message   Reply w/Quote
Erik, Like Hemikiller said, fabricate a good gnd strap from chassis to block. Also, with a voltmeter, check (car running) for approx 12 VDC at your 6AL box. MSD recommends no less than 11 VDC. You'll also have to do some trend analysis. Does this occur when engine is fully warmed up?. Sometimes coils will break down at high temps and then work after it cools down. Good Luck! Let us know the outcome.

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rockafellz
Gearhead

Posts: 1426
From: San Lorenzo, CA, USA
Registered: Aug 2001

posted 03-10-2003 12:32 PM     Click Here to See the Profile for rockafellz   Click Here to Email rockafellz     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by CJ:
Erik, Like Hemikiller said, fabricate a good gnd strap from chassis to block. Also, with a voltmeter, check (car running) for approx 12 VDC at your 6AL box. MSD recommends no less than 11 VDC. You'll also have to do some trend analysis. Does this occur when engine is fully warmed up?. Sometimes coils will break down at high temps and then work after it cools down. Good Luck! Let us know the outcome.

Hey CJ,

At what point in the MSD system would I probe the lines? The wires running to the coil? Or the wires running from the battery to the 6AL?

The 6AL and Blaster 3 coil is mounted on the drivers side engine compartment wall (where the windshield washer bag used to be). I don't think it gets too hot in that part of the engine compartment, but I could always be wrong. I'll post a pic later of the mounting configuration.

Hey Scoop,

I've only opened the distributor rotor once and I don't have a clue where the pickup is located in the distributor. Educate me on this one please.

Erik

------------------
1966 Ford Mustang 2+2
Mine - Restomod in Progress

1966 Ford Mustang Coupe
Dad's - Original Unrestored

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