Spark Plug Arching
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Freshman User
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Spark Plug Arching
I replaced the plugs and wires in my '93 Aerostar 4.0L about 3-4 weeks ago. I then tightened the lower intake manifold. I still have a misfire.
I placed a small mirror taped on a magnetic pick-up tool at each plug because I thought I heard a snapping sound. There it was, the spark at #5 is traveling around the center of the plug and short grounding to the outside of the plug.
If I bent the connector to the plug, can it be adjusted to fit correctly?
Will di-electric grease help?
Should I return the one wire to the store?
Dativer
I placed a small mirror taped on a magnetic pick-up tool at each plug because I thought I heard a snapping sound. There it was, the spark at #5 is traveling around the center of the plug and short grounding to the outside of the plug.
If I bent the connector to the plug, can it be adjusted to fit correctly?
Will di-electric grease help?
Should I return the one wire to the store?
Dativer
Last edited by dativer; Aug 11, 2004 at 06:02 PM. Reason: bad choices
Spark Plug Arching
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Joined: Mar 2003
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Are you saying you are concerned you put too much dielectric grease on the wire-to-plug metal connection, and that is causing the spark to ground to the outside of the plug? If so I suppose it's possible, dielectric grease is an insulator (it does NOT conduct electricity), but doesn't seem likely. I would first suspect that plug gap is too wide, and the electricity is finding an easier way to ground.
You may already have had a good look at the problem, but if you rev your engine on a dark night with the hood up, electical problems will light up like a Christmas tree.
John
You may already have had a good look at the problem, but if you rev your engine on a dark night with the hood up, electical problems will light up like a Christmas tree.
John
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Freshman User
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Thank you, thank you, thank you
I removed all the wires completely, one at a time. I sprayed contact cleaner on both ends, cleaning the copper connections. I then sprayed each plug, to clean off the connection end. I placed dielectric on the ceramic of each plug and on the edge of each boot and on each coil boot. Replacing the wires.
One of the boots had a small crack from the edge in towards the wire. I put extra dielectric on the boot and onto the ceramic of the plug.
TADA! No more arcing.
Thank you, Pipercub, Rockledge, MrShorty, and Racerguy.
Only Mac owners are equal to the tireless help you provide to total strangers in need.
Thanks alot again. If I can ever repay you, just ask.
DATIVER, Valley Forge Area
One of the boots had a small crack from the edge in towards the wire. I put extra dielectric on the boot and onto the ceramic of the plug.
TADA! No more arcing.
Thank you, Pipercub, Rockledge, MrShorty, and Racerguy.
Only Mac owners are equal to the tireless help you provide to total strangers in need.
Thanks alot again. If I can ever repay you, just ask.
DATIVER, Valley Forge Area
