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Computerized Engine Controls

Computerized Engine Controls


Computerized Engine Controls





















































Gmail. The system uses a maze of emissions vacuum hoses.[6] Because of the many vacuum-driven components and electrical connections in the system, CEC-equipped engines have developed a reputation of being hard to tune.[7] American Motors issued a Technical Service Bulletin to diagnose low or inconsistent engine idle speeds on 1980 through 1988 AMC Eagle automobile.[8]. External links[edit]. Calendar. Retrieved 13 March 2014. YouTube. ISBN9780835902632. Unfortunately, this page wasn't found Return to the Higher Education homepage. CEC was unique in that almost all of its sensors and actuators were digital; instead of the usual analog throttle position, coolant temperature, intake temperature and manifold pressure sensors, it used a set of fixed pressure- and temperature-controlled switches (as well as a wide-open throttle switch on the carburetor) to control fuel mixture and ignition timing. The Computerized Engine Control or Computerized Emission Control (CEC) system is an engine management system designed and used by American Motors Corporation (AMC) and Jeep on 4- and 6-cylinder engines of its own manufacture from 1980 to 1990.[1].


Contents 1 Operation 2 Maintenance 3 References 4 External links . .. The CEC module itself (the most common version of which is the "AMC MCU Super-D") was manufactured for AMC by Ford Motor Company, and worked with a Duraspark ignition system. The 49-state model of the CEC has no on-board diagnostic system, making it difficult to monitor the computer's operation without a breakout box, and the Carter BBD carburetor on most CEC-equipped models has problems with its idle circuit clogging, causing a rough idle and stalling. "How-to: YJ Wrangler 4.2L Six Two-Barrel 'BBD' Carburetor Rebuild!". "EFI Options for the AMC 6-258 Engine". Play.


In places where emissions testing is not required, a popular modification is to bypass the computer and disable the BBD's Idle Servo, or replace the BBD with a manually tuned carburetor. ^ Brady, Robert N. Jeep Adventures Under the Hood, guide to the CEC system and how to tune it, the "Nutter" bypass . View All Close Or visit these sites for more resources: Match your course to text choices with a few easy steps. ^ a b Shipman, Mark. p.283.


October 1985. Retrieved 13 March 2014. Several vendors (including Chrysler and Edelbrock) offer retrofit kits that replace the CEC and the carburetor with fuel injection.[6]. Retrieved 13 March 2014. ISBN9780760306369.


Retrieved 13 March 2014. ^ Fennema, Roger (1987). News. 405 Not Allowed.. ^ "AMC 258 I6". Automotive electrical and electronic systems, Volume 2. bd9e74395d

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