PING with spark plug burn out
Thread Starter
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New User
Joined: Nov 2002
Posts: 2
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PING with spark plug burn out
I have a 89 F-150 5.0ltr. with a new AC Delco engine (2 yr old) The truck has been pinging,partially and hesitates while accel. Ford dealer last year replaced Plugs, Distr Cap, rotor and wires. He also found the spark plug to Cyl #8 was burnt out. The same thing happened 12 months prior and the shop (private shop) did almost the same repair. The cycle is repeating again, this time I checked the plugs and the #8 Cyl plug was burnt out, the electrode was almost totally gone.
The truck is at another dealer and they can't find the cause. Compression is almost perfect in ALL 8 cyl. No exhaust leaks.
ANY IDEAS besides selling it.
The truck is at another dealer and they can't find the cause. Compression is almost perfect in ALL 8 cyl. No exhaust leaks.
ANY IDEAS besides selling it.
Posting Guru
Joined: Apr 2002
Posts: 1,471
Likes: 3
From: Greenwood In. USA
PING with spark plug burn out
Maybe a colder range on the plugs. Also there have been numerous posts on here about moving PVC to the tee in the center of the plenum
as were it is now causes a lean condition on #8
Hope this helps
Gasman
Do you have Gas?
Propane Execeptional Energy
as were it is now causes a lean condition on #8
Hope this helps
Gasman
Do you have Gas?
Propane Execeptional Energy
Senior User
Joined: Jun 2002
Posts: 117
Likes: 0
From: SC
PING with spark plug burn out
>I have a 89 F-150 5.0ltr. with a new AC Delco engine (2 yr
>old) The truck has been pinging,partially and hesitates
>while accel. Ford dealer last year replaced Plugs, Distr
>Cap, rotor and wires. He also found the spark plug to Cyl #8
>was burnt out. The same thing happened 12 months prior and
>the shop (private shop) did almost the same repair. The
>cycle is repeating again, this time I checked the plugs and
>the #8 Cyl plug was burnt out, the electrode was almost
>totally gone.
>The truck is at another dealer and they can't find the
>cause. Compression is almost perfect in ALL 8 cyl. No
>exhaust leaks.
>ANY IDEAS besides selling it.
I'm still learning a lot about these trucks here myself, but I do believe yours is not an uncommon occurance. Do some searching of this forum via the search feature.
Wade
>old) The truck has been pinging,partially and hesitates
>while accel. Ford dealer last year replaced Plugs, Distr
>Cap, rotor and wires. He also found the spark plug to Cyl #8
>was burnt out. The same thing happened 12 months prior and
>the shop (private shop) did almost the same repair. The
>cycle is repeating again, this time I checked the plugs and
>the #8 Cyl plug was burnt out, the electrode was almost
>totally gone.
>The truck is at another dealer and they can't find the
>cause. Compression is almost perfect in ALL 8 cyl. No
>exhaust leaks.
>ANY IDEAS besides selling it.
I'm still learning a lot about these trucks here myself, but I do believe yours is not an uncommon occurance. Do some searching of this forum via the search feature.
Wade
Thread Starter
|
New User
Joined: Nov 2002
Posts: 2
Likes: 0
PING with spark plug burn out
>I have a 89 F-150 5.0ltr. with a new AC Delco engine (2 yr
>old) The truck has been pinging,partially and hesitates
>while accel. Ford dealer last year replaced Plugs, Distr
>Cap, rotor and wires. He also found the spark plug to Cyl #8
>was burnt out. The same thing happened 12 months prior and
>the shop (private shop) did almost the same repair. The
>cycle is repeating again, this time I checked the plugs and
>the #8 Cyl plug was burnt out, the electrode was almost
>totally gone.
>The truck is at another dealer and they can't find the
>cause. Compression is almost perfect in ALL 8 cyl. No
>exhaust leaks.
>ANY IDEAS besides selling it.
I submitted the original question: Pinging and burnt out plug. The problem is FIXED. My wife helped out considerable. She did further researh on the WEB and found that Dodge had a similar problem almost to the letter. I re-ran my plug wires on the right side (drivers), keeping them at least 3 to 4 inches apart and if they crossed, cross them at 90 degs. I changed the plug and for the last 500 miles, I have had no pinging and the plug seems to be ok. Time will tell for sure. Your site was a big help in steering us in the right direction.
>old) The truck has been pinging,partially and hesitates
>while accel. Ford dealer last year replaced Plugs, Distr
>Cap, rotor and wires. He also found the spark plug to Cyl #8
>was burnt out. The same thing happened 12 months prior and
>the shop (private shop) did almost the same repair. The
>cycle is repeating again, this time I checked the plugs and
>the #8 Cyl plug was burnt out, the electrode was almost
>totally gone.
>The truck is at another dealer and they can't find the
>cause. Compression is almost perfect in ALL 8 cyl. No
>exhaust leaks.
>ANY IDEAS besides selling it.
I submitted the original question: Pinging and burnt out plug. The problem is FIXED. My wife helped out considerable. She did further researh on the WEB and found that Dodge had a similar problem almost to the letter. I re-ran my plug wires on the right side (drivers), keeping them at least 3 to 4 inches apart and if they crossed, cross them at 90 degs. I changed the plug and for the last 500 miles, I have had no pinging and the plug seems to be ok. Time will tell for sure. Your site was a big help in steering us in the right direction.
Freshman User
Joined: Mar 2001
Posts: 37
Likes: 0
From: Southeast Texas
PING with spark plug burn out
My first question is does it do this when your are climbing a hill or a bridge?And if so your wires probably won't cure the problem.You need to look for a vacuum leak where the plenum meets the intake.This has happened to me before and the dealership never could find it.A friend told me to look where I told you and sure enough that is what it was.I smeered some RTV sealant on all the seams and that fixed it.I later changed the gasket.Never happened again.Oh yeah it was the number eight cylinder also. Trending Topics
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
PING with spark plug burn out
The plug wire problem is very common. People try to make the plug wires look all neat and tidy when they replace them and then it pings afterwards. The wires for the cylinders that fire next to each other cant be run parallel or they will crossfire causing pinging and plugs to burn up.
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