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Originally Posted by Chuck999
I had a 4'runner for 14 years - it pinged from about the first month to the month I traded it in with 170,000 miles on it ... Premium, mid grade, low grade - pinged with 'em all. Sometimes it seemed worse than others but never ever could figure out what made it worse / better - other than the heat - always seemed way worse on hotter days ....
Then again - never had a single engine problem in 170k miles either ...
Now I hear a very little ping from my new 2005 Tundra as well. A lot less than the old 4'runner - but it's still there ... Guess it's just a Toyota engine kind of thing ... I had a Corolla with a little 4 banger that pinged as well ....
I'll try the mid-grade on my Tundra too - but I'm not optimistic ...
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Thanks Chuck,
I'm actually eginning to thing it has something to do with my ECU (air to gas mixture), I think that learning ability has put a damper on my being able to stomp it as well. If it's not the ECU than I think I have some engine issues, but I don't think so.