Electronic control unit: Engine Control Unit. It regulates all the aspects related to the engine's proper functioning.
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Engine Control Unit. According to the values shown by different sensors, it estimates certain parameters such as the amount of air and fuel that need to be supplied, the amount of time needed to start the car, the pressure of the turbocharger, and any other key aspects to maximize its performance and efficiency with the least amount of contamination possible.
1998 chevy Silverado. Have spark and strong crank. Battery good. Thought it might be security system but realized after going through that process that my security light was not flashing to begin with so I think I can rule that out. Would really appreciate some guidance on what to do from here. Thank you!