Pinging Emergency
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Joined: Apr 2002
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From: Tucson USA
Pinging Emergency
I have got a 1979 Ford F350 1 Ton with a 400M engine. I have been driving long distance today and it started ping real bad halway through my trip. I pulled over checked it out and didn't see any leakage, but when i tried to start it again it barely started. I got back on the road and from then on it was constant pinging all the way to my destination. It now pings when i am accelerating from a stop and it also pings when i rev my engine. ANY ideas on how to fix this or isolate the problem. I am in a very tight jam since i am away from home and have through labor day to fix it.
I appreciate the help A WHOLE BUNCH. i don't know why it would just start to do this when the day before it was running like a champ.
thanks again
herunar
I appreciate the help A WHOLE BUNCH. i don't know why it would just start to do this when the day before it was running like a champ.
thanks again
herunar
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Joined: Jan 2001
Posts: 56,966
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From: Virginia
Pinging Emergency
Is it overheating? This could cause it to ping.
Is it idling at a higher rpm than it usually does? If so, a vacuum line could have come off somewhere causing a vacuum leak.
Your thermal switch to the egr may have gone bad, not letting the egr work. Find the egr valve and take the vacuum line off. With the engine fully warmed up, when you rev the engine, you should feel vacuum on the egr line.
I guess you can't do this away from home, but you can also check the timing with a timing light. Things to look for are initial timing way too far advanced(weights in the distributor may have rusted and are stuck), and see if it is advancing correctly when the engine is revved.
Is it idling at a higher rpm than it usually does? If so, a vacuum line could have come off somewhere causing a vacuum leak.
Your thermal switch to the egr may have gone bad, not letting the egr work. Find the egr valve and take the vacuum line off. With the engine fully warmed up, when you rev the engine, you should feel vacuum on the egr line.
I guess you can't do this away from home, but you can also check the timing with a timing light. Things to look for are initial timing way too far advanced(weights in the distributor may have rusted and are stuck), and see if it is advancing correctly when the engine is revved.
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