Spark pulg gap

73vertstang

New Member

Nov 21, 2007

56

0

0

Mt Airy Maryland

Sep 26, 2008

#1

• Sep 26, 2008

• #1

Quick question:

Just finished wiring my 351C with a MSD 6 box and coil and a Mallory dist.
Engine will crank but not fire. The gap of the plugs are set to 35, should I re-gap to 42? Will this prevent the engine from firing? We pulled one plug. grounded it
and had a nice spark but I seem to remember bring told to open the gap because
of the elec/ing. Is this correct?

Thanks!

 

65fastbackresto

Active Member

Apr 13, 2007

1,229

7

39

AR

Sep 26, 2008

#2

• Sep 26, 2008

• #2

I think mine are at 50

But I got a 302 and not sure if the info is even relavant to your application.

 

F

ForceFed70

That's why they call it "dope"

Founding Member

Dec 6, 1999

4,818

1

69

BC Canada

Sep 26, 2008

#3

• Sep 26, 2008

• #3

Opening the gap will help produce more power, but I really doubt it has anything to do with your current problem. I'd look elsewhere for your problem.

 

S-Car-Go

Member

Mar 25, 2003

332

0

16

San Jose, CA

Sep 27, 2008

#4

• Sep 27, 2008

• #4

Distributor off by 180*?

.035 gap should fire.

 

blown65

Founding Member

Jul 7, 1999

1,938

4

39

Queen Creek Arizona

Sep 27, 2008

#5

• Sep 27, 2008

• #5

If its not firing at 35 its not going to at 42. Double check your timing.

 

73vertstang

New Member

Nov 21, 2007

56

0

0

Mt Airy Maryland

Sep 27, 2008

#6

• Sep 27, 2008

• #6

Thanks guys!

The dizzy being off by 180* is what I'm thinking to.

I'll re-gap the plugs to 42 leaving number 1 for last.
When I pull the plug I'll make sure the motor is at Top Dead Center
and reset the distributor and try and fire it. Thanks again, I wanted to
be sure I was on the right track!

 

73vertstang

New Member

Nov 21, 2007

56

0

0

Mt Airy Maryland

Oct 1, 2008

#7

• Oct 1, 2008

• #7

Quick update!

I had two problems. First: had a bad fuel pump. Had vacumed the lines to the
carb to get out all the air in them and had only what was between the fuel pump
and the carb.

Second: The Mallory dist spins "counter" clockwise. Set up for normal clockwise
rotation. Pulled all the wire's except number 1 and re-ran them in the correct
firing order counter clockwise. She fired on the first try!!! Purres like a hungry
tiger!!! Thanks!