Pinging?
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Mountain Pass
Joined: May 2021
Posts: 183
Likes: 21
Pinging?
82 F350, T18, 351W. If I hit the accelerator hard I hear a noise from my engine, like a clicking/tapping. It is very faint. If I ease up, it disappears. Is this pinging? If so, do I just retard my timing a little to cure it? That means that if I use 10 degrees BTDC now, I want to go to a lower number to retard it? Correct?
Cargo Master
Joined: Aug 2007
Posts: 2,561
Likes: 69
From: New Zealand
82 F350, T18, 351W. If I hit the accelerator hard I hear a noise from my engine, like a clicking/tapping. It is very faint. If I ease up, it disappears. Is this pinging? If so, do I just retard my timing a little to cure it? That means that if I use 10 degrees BTDC now, I want to go to a lower number to retard it? Correct?
Turning the distributor counter-clockwise (viewed from above) will retard your timing & stop the noise. But pinging can have many causes....so if your compression & timing etc, are near spec, something else could be at play.
Moderator
Joined: Jan 2001
Posts: 56,992
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From: Virginia
If you want to verify if it's the timing, take the hose going to the distributor off and plug it, and see if it goes away. If it does, it probably is a pinging/timing issue.
I have been down this road before. You can turn the timing back, but the more you turn it back, the less power and throttle response the engine has, and the less fuel mileage you get. You can try to leave the timing where it is and try to get the EGR working again. The EGR will help with pinging. But if you have modified the exhaust like I had (headers and duals) then it's difficult to get the EGR to work correctly also.
What finally made my pinging go away was to change to a 180 degree thermostat. Mine would not ping running around town, only would do it after a hard run on the interstate.
But take the line off the dist first to verify it is a timing issue.
I have been down this road before. You can turn the timing back, but the more you turn it back, the less power and throttle response the engine has, and the less fuel mileage you get. You can try to leave the timing where it is and try to get the EGR working again. The EGR will help with pinging. But if you have modified the exhaust like I had (headers and duals) then it's difficult to get the EGR to work correctly also.
What finally made my pinging go away was to change to a 180 degree thermostat. Mine would not ping running around town, only would do it after a hard run on the interstate.
But take the line off the dist first to verify it is a timing issue.
Thread Starter
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Mountain Pass
Joined: May 2021
Posts: 183
Likes: 21
It could be pinging.....which will occur under load & then stop when the load is reduced, but so does knocking from a mechanical fault. Pinging sounds different in different engines - from a hard tapping to a light, metallic tinkling.
Turning the distributor counter-clockwise (viewed from above) will retard your timing & stop the noise. But pinging can have many causes....so if your compression & timing etc, are near spec, something else could be at play.
Turning the distributor counter-clockwise (viewed from above) will retard your timing & stop the noise. But pinging can have many causes....so if your compression & timing etc, are near spec, something else could be at play.
Thread Starter
|
Mountain Pass
Joined: May 2021
Posts: 183
Likes: 21
If you want to verify if it's the timing, take the hose going to the distributor off and plug it, and see if it goes away. If it does, it probably is a pinging/timing issue.
I have been down this road before. You can turn the timing back, but the more you turn it back, the less power and throttle response the engine has, and the less fuel mileage you get. You can try to leave the timing where it is and try to get the EGR working again. The EGR will help with pinging. But if you have modified the exhaust like I had (headers and duals) then it's difficult to get the EGR to work correctly also.
What finally made my pinging go away was to change to a 180 degree thermostat. Mine would not ping running around town, only would do it after a hard run on the interstate.
But take the line off the dist first to verify it is a timing issue.
I have been down this road before. You can turn the timing back, but the more you turn it back, the less power and throttle response the engine has, and the less fuel mileage you get. You can try to leave the timing where it is and try to get the EGR working again. The EGR will help with pinging. But if you have modified the exhaust like I had (headers and duals) then it's difficult to get the EGR to work correctly also.
What finally made my pinging go away was to change to a 180 degree thermostat. Mine would not ping running around town, only would do it after a hard run on the interstate.
But take the line off the dist first to verify it is a timing issue.
Cross-Country
Joined: Jan 2022
Posts: 92
Likes: 20
From: Pa
Cargo Master
Joined: Aug 2007
Posts: 2,561
Likes: 69
From: New Zealand
Assuming it is pinging, it sounds light......but IMO still needs to be corrected. The owners manuals say some ping is acceptable, but personally I would tune it completely out, to be safe.
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