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diagnosis

  1. Lean condition at part throttle

    Having an odd issue right now. LTFT both banks are going to +20 when cruising down the road at part throttle. I also get sporadic spark knock when im crusing at 2k rpm and lean into the trottle. They normalize when I go 50% or more throttle. I currently run E85 and have verified 85%. I have...
  2. Idle surge once warm between 1100-2000 RPM in neutral and clutched in.

    Hi all! I’m running into some issues and I’m starting to think it might be my tune and that I just need a couple revisions but just wanted to cover my bases and be safe. I recently installed the following mods: New PCV solenoid Holley EFI Lo-Ram GT350TB JLT CAI no tune Stock Injectors Stock...
  3. What is this rattle sound?

    It’s only on cold starts and I don’t know if it’s something bad. It’s a 2018 GT
  4. Need help diagnosing whistling noise from engine

    My car is a 2017 Mustang GT with GT350 intake and throttle body. I put my GoPro in my CAI box to record some sound and realized it could be useful for diagnosing this issue. I’ve had the car for nearly a year now, and I’ve always noticed this sound once it hits a high pitch (it has gotten worse...
  5. Manifold Swap Diagnosis Help

    Hi all, I have a manual 2016 GT and I did a 2018 ported manifold with 47lb injectors. Got it all on and put the tune on and upon start up it seems to be working itself out like usual after a new mod and tune, but then rpm’s started climbing and climbing while in neutral until eventually I shut...
  6. Resolved: Front/Top end click on cold start

    Hello, I was doing some work under the hood today and noticed this clicking sound on startup from cold. It is very intermittent as you can hear. It went away completely after about 1 minute of idling. It is not the typical driver’s side wheel well coyote tick that sounds like bottom end (which...





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