Re: Pinging Problem
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Home away from home
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Does the pinging occur at highway speeds and climbing a hill? And if you back off the throttle a bit it will stop pinging?
Posted on: Yesterday 22:27
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Re: Pinging Problem
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Webmaster
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Could you be running too lean?
Posted on: Today 6:22
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-BigKev
1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog 1937 Packard 115-C Convertible Coupe -> Registry | Project Blog |
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Re: Pinging Problem
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Home away from home
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Running lean due to carburetor issues or a vacuum leak could cause it. A low carburetor float level could cause lean out and pinging, as could a restricted fuel supply. A problem with the distributor vacuum or centrifugal advance mechanisms could cause it. A stuck manifold heat valve could contribute to it.
A problem with the water distributing tube, if present, could cause it. Be sure the plug wires are in the correct firing order. The engine should idle and run smoothly even with the initial timing set a few degrees later than spec. Vacuum leaks can occur at the intake manifold gaskets, carburetor gaskets, throttle shaft, vacuum booster pump, and anywhere in a vacuum windshield wiper system or any other vacuum device, including the vacuum advance or an automatic transmission vacuum modulator. ***Overheating or heavy carbon deposits can also cause pinging. In the case of carbon deposits, driving the car on the open road for a few dozen miles at 50 to 60 MPH will usually get rid of it. Avoid hard acceleration or driving with continuous pinging. Stale gasoline can lay down heavy combustion chamber deposits in a hurry, and stale gasoline may have much lower octane than it did when fresh. Be sure your gasoline is fresh.
Posted on: Today 9:25
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