The Ford Barn

1929 · 04-04-2017, 08:41 PM

What are the usual signs,and symptoms of spark plugs going bad?

1930-Pickup · 04-04-2017, 08:54 PM

Misfire under load is common. But this can apply to other parts of the ignition system as well.

1930-Pickup · 04-04-2017, 09:41 PM

The answers to your question can very much fill a large shopping cart.
Is there a specific problem that you're having?

Tom Wesenberg · 04-04-2017, 11:38 PM

A whistling noise is one symptom. I saw a plug one time where the center blew out of the base.

Mitch//pa · 04-05-2017, 05:28 AM

A few Things to look at on a good still functioning plug:

Increased gap
Worn electrode
Worn ground strap

BILL WILLIAMSON · 04-05-2017, 09:03 AM

Sponsored Links (Register now to hide all advertisements)

In a well set up engine, plug problems are rare, if you drive it OFTEN & with "GUSTO" & don't let it sit & idle for HOURS at a time.
As long as it runs well, I NEVER even LOOK at a plug. Some folks DIDDLE too MUCH-- (I mean WITH CARS)--LOL
Bill Smooth

04-04-2017, 08:41 PM	#1
1929 Senior Member Join Date: Jan 2015 Location: New York Posts: 944	Spark Plugs? What are the usual signs,and symptoms of spark plugs going bad?

04-04-2017, 08:54 PM	#2
1930-Pickup Senior Member Join Date: Mar 2017 Location: southern California Posts: 725	Re: Spark Plugs? Misfire under load is common. But this can apply to other parts of the ignition system as well.

04-04-2017, 09:41 PM	#3
1930-Pickup Senior Member Join Date: Mar 2017 Location: southern California Posts: 725	Re: Spark Plugs? The answers to your question can very much fill a large shopping cart. Is there a specific problem that you're having?

04-04-2017, 11:38 PM	#4
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Spark Plugs? A whistling noise is one symptom. I saw a plug one time where the center blew out of the base.

04-05-2017, 05:28 AM	#5
Mitch//pa BANNED Join Date: May 2010 Location: Bucks County, PA Posts: 11,454	Re: Spark Plugs? A few Things to look at on a good still functioning plug: Increased gap Worn electrode Worn ground strap

04-05-2017, 09:03 AM	#6
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Spark Plugs? Sponsored Links (Register now to hide all advertisements) In a well set up engine, plug problems are rare, if you drive it OFTEN & with "GUSTO" & don't let it sit & idle for HOURS at a time. As long as it runs well, I NEVER even LOOK at a plug. Some folks DIDDLE too MUCH-- (I mean WITH CARS)--LOL Bill Smooth __________________ "THE ASSISTANT GURU OF STUFF"