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?
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My 2004 5-speed has been pinging under medium acceleration at low rpm since Day One. Back to Chrysler three times. Twice they said there was no pinging. Third time I went with the tech who heard and recorded the ping. He claimed all 04s did that. We took a new car off the lot, and it pinged. He said he'd take it up with the ECU people at DC, but I never heard back form them. So I learned to avoid that rpm range.
Then I got into occasional drag racing and found that MMT octane booster eliminated the pinging. According to a test in one of the car mags, it increases octane from 91 to just over 93. Definitely works for me. So whenever I go racing, I use a can. I am not a great racer, but got a nice 14.7 last night at Sacramento Raceway (the SRT4s all did 14.1 to 14.5s).