thirdoptik
Active Member
- Joined
- Sep 1, 2021
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- United States
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- 2018 Mustang GT - Performance Pack
Anyone else with this kit getting mild engine knock on 91 octane? Occasionally happens getting on the gas between 2.5K and 3K RPMS only, going from 2nd to 3rd. It's there and gone as I pass through that RPM range. Only hearing it for a fraction of a second. If I don't pay attention or I have the windows up, I may not hear it. I've noticed it maybe half a dozen times only on this first and only tank of gas from Costco. Last year I was driving on 94 octane which has up to 10% ethanol. Never heard any knocking. This year, due to the insanity of gas prices I switched to 91 with no ethanol. Should I top off my half tank with 94 or run it down to empty and then fill with 94 and observe for signs of knock?
Has anyone used the Procal to data log? Or to see if the PCM is pulling timing or the knock sensors are being triggered?
I've heard the the sound from 2 to 3k are injectors kicking in and not a problem to worry about. Can't remember where I read it in the forums. Also, heard the the Calibration Kit tune will not alleviate that issue because it's normal. As far as gas; personally, I would not invest in Costco, Sam's, or Wal-Mart fuel. I uses Shell V-Power 93 Octane and it does my 5.0 well. Try better fuel after you run that out. I too have the sound very slightly that you speak of an no performance losses. I only run 93. We have plenty in our region is why
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