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Problem with my Shelby GT500


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Hi everyone!

I'm reaching out to you because after a lot of research, I can't seem to identify the issue with the Ford Shelby Mustang GT500 2014,

V8 5800 Cm3 Supercharged engine.

Suddenly, it started trembling and emitting smoke with an unpleasant odor.

Symptoms: smoke, trembling, unstable idle, odor, jerking.

Work done by myself:

  • Changed the injector harness
  • Replaced injector number 2 as it showed on diagnostics
  • Replaced all injector seals
  • Adjusted camshaft torque angle (to address hot start issue)
  • Adjusted timing belt

These actions reduced some of the symptoms, but I can't see myself driving it this way, especially at low speeds where the car also jerks.

In Group 13, all injectors show values fluctuating between -+ 1.5 to 3.5 mg/tps. None of the injectors have stable data. I tried fixing it myself, but with no positive outcome. I went to the garage and explained the issues with my Ford Shelby Mustang, and they checked it. After identifying the problem, they suggested using an engine cleaner. I applied the product at home, but unfortunately, a few days later, the problem persists with no satisfying results.

I'm reaching out for your expertise to get my car running smoothly again.

Thank you in advance.

Edited by Billy
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