Need help with weird Pinging problem
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Elder User
Joined: Sep 2006
Posts: 519
Likes: 1
From: Bountiful UT
Need help with weird Pinging problem
I have been chasing a pinging issue for awhile now and need some help figuring it out.
while driving if try to speed up and ease into the throttle it Pings like crazy, If I give it 3/4 throttle or more it is fine (no pinging) Also it is a lot worse when I am running the A/C. I have pulled codes and get 11 showing all is good, I have set my timing to 10 deg, done cap, rotor, and plugs, ran a can of seafoam through the booster line, and checked for vac leaks. What else should I check??
It runs great other than the pinging, has good power and I am getting 12 mpg on average. I Have been chasing this for a month now and I'm stumped, I am using the same grade fuel ( 88 octane ) and always get my fuel from the same station.
Truck is a 88 F250 4x4 with a 460 and a 5 speed.
while driving if try to speed up and ease into the throttle it Pings like crazy, If I give it 3/4 throttle or more it is fine (no pinging) Also it is a lot worse when I am running the A/C. I have pulled codes and get 11 showing all is good, I have set my timing to 10 deg, done cap, rotor, and plugs, ran a can of seafoam through the booster line, and checked for vac leaks. What else should I check??
It runs great other than the pinging, has good power and I am getting 12 mpg on average. I Have been chasing this for a month now and I'm stumped, I am using the same grade fuel ( 88 octane ) and always get my fuel from the same station.
Truck is a 88 F250 4x4 with a 460 and a 5 speed.
Elder User
Joined: Jun 2013
Posts: 548
Likes: 0
From: SoCal 909
Need help with weird Pinging problem
Subscribed. My 92 does the same thing. Mainly with ac on and either moderate acceleration of climbing steep hills. I've done everything you could regarding tune and setting timing.
Cargo Master
Joined: Jun 2010
Posts: 2,113
Likes: 4
From: Iowa
I have been chasing a pinging issue for awhile now and need some help figuring it out.
while driving if try to speed up and ease into the throttle it Pings like crazy, If I give it 3/4 throttle or more it is fine (no pinging) Also it is a lot worse when I am running the A/C. I have pulled codes and get 11 showing all is good, I have set my timing to 10 deg, done cap, rotor, and plugs, ran a can of seafoam through the booster line, and checked for vac leaks. What else should I check??
It runs great other than the pinging, has good power and I am getting 12 mpg on average. I Have been chasing this for a month now and I'm stumped, I am using the same grade fuel ( 88 octane ) and always get my fuel from the same station.
Truck is a 88 F250 4x4 with a 460 and a 5 speed.
while driving if try to speed up and ease into the throttle it Pings like crazy, If I give it 3/4 throttle or more it is fine (no pinging) Also it is a lot worse when I am running the A/C. I have pulled codes and get 11 showing all is good, I have set my timing to 10 deg, done cap, rotor, and plugs, ran a can of seafoam through the booster line, and checked for vac leaks. What else should I check??
It runs great other than the pinging, has good power and I am getting 12 mpg on average. I Have been chasing this for a month now and I'm stumped, I am using the same grade fuel ( 88 octane ) and always get my fuel from the same station.
Truck is a 88 F250 4x4 with a 460 and a 5 speed.
Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
Check fuel psi.
I had same problem, but it would also quit when I ran 91 or 93 octane. Finally decided to replace the FPR with an adjustable one and so far I can run above 12 and up to 16° advance on timing. Before, if I set it at 10° it would still ping and once I replaced my FPR, even a stock unit, mine finally quit pinging and also cured my often Hard starting when engine was warm.
I had same problem, but it would also quit when I ran 91 or 93 octane. Finally decided to replace the FPR with an adjustable one and so far I can run above 12 and up to 16° advance on timing. Before, if I set it at 10° it would still ping and once I replaced my FPR, even a stock unit, mine finally quit pinging and also cured my often Hard starting when engine was warm.
Laughing Gas
Joined: Jan 2008
Posts: 751
Likes: 0
From: NC
Too much air and/or too little fuel is the likely cause... Great recommendations regarding EGR issues and fuel pressure.
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Elder User
Joined: Sep 2006
Posts: 519
Likes: 1
From: Bountiful UT
Thanks for the advice, I will grab my gauges from work monday and check the fuel pressure, and check the egr. I will report back with what I find.
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