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Pinging on acceleration

 
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Old 29 Aug 2005, 01:25 am
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Default Pinging on acceleration

'05 GT w/autostick. 3500 miles......always use "toptier" premium from QT. A/C is on all the time(supposed to be 112' tomorrow)....when I put my foot in it on the highway(cruising at 80, punch it up to 95/100), it pings. Around town under heavy stop light acceleration, no ping. Normal?
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Old 29 Aug 2005, 05:57 am
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Not necessarily. Could be that you just got a bad batch of gas, I don't go to QT anymore by the way. I drive around and look for a shell or chevron station. Maybe the occasional mobil. But anyhow, also did you check your spark plugs? if the gap is too open then yes, at high rpms you would ping. [V]
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Old 29 Aug 2005, 12:12 pm
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Pinging on a new GT with only 3500 miles on it is not normal. My 04GT/Autostick has never pinged under any driving conditions. If available in your area, I would recommend trying Chevron Supreme (91 octane) gas which I have used exclusively in my car with great results. If your spark plugs gap was set incorrectly at the factory this might also be a possible cause of the problem. The recommended gap is .050. When my plugs were recently replaced at 15K miles the gap had expanded in all of them to .055. Inspite of this gap increase I never experienced a pinging problem. Good luck.
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Old 29 Aug 2005, 12:12 pm
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MY OPINION.
You should not have pinging. Make dealer fix it.
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Old 29 Aug 2005, 02:04 pm
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[|)] What QSD said. This is for 2 reasons. First, so that the car is checked and hopefully fixed. Second, so that the problem is documented early. Any problems you have should be documented ASAP. That way the dealer and Mfgr. can't say it's not covered or something you did. You might want to describe the speed that it happens at a more "legal" range, so they don't come back with the dreaded "abuse" tag.
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Old 29 Aug 2005, 08:00 pm
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Quote:
quote:Originally posted by coolvanillagt

'05 GT w/autostick. 3500 miles......always use "toptier" premium from QT. A/C is on all the time(supposed to be 112' tomorrow)....when I put my foot in it on the highway(cruising at 80, punch it up to 95/100), it pings. Around town under heavy stop light acceleration, no ping. Normal?
I have the same issue when the temp gets up towards 95-100 degrees. blown cars just don't like a lot of hot air since we generate so much of our own. My car is happiest around 85 degrees and below.
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Old 30 Aug 2005, 01:44 pm
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Does it ping while sitting in the driveway and reving up to 3,000 RPM? I heard what I thought was pinging (sounds like crickets right?) on my '03 GT everytime it would rev high. I use 93 octane.

When I was able to listen more closely to it, it didn't seem like pinging. The dealer suggested it was a belt, and that apears to have fixed it.
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Old 30 Aug 2005, 02:01 pm
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Quote:
quote:Originally posted by robinjoe

(sounds like crickets right?)
I would describe pinging as sounding like loose bolts being shaken in a tin can...
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Old 30 Aug 2005, 04:17 pm
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Quote:
quote:Originally posted by robinjoe
...sounds like crickets right...The dealer suggested it was a belt, and that apears to have fixed it.
Usually when a "cricket" appears if signifies that your belts need adjustment and/or lubrication. Glad you got the problem fixed. Sounds like your dealer knows his stuff. [8D]
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Old 01 Sep 2005, 04:07 pm
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Under hard acceleration and very high ambient temps and going uphill mine will ping with 91 Octane. It is a lot worse if I use regular 87 octane too. Moral of the story is always use premium fuel in the summer if you want safe full throttle acceleration.
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