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Navistar International Corp. is expected to disclose Friday (July 6) that it is backing away from the pollution-reduction technology for its engines that has weighed on the U.S. truck maker’s sales and brought it into conflict with federal regulators, the Wall Street Journal reported, citing people familiar with the company’s plans..

The company plans to adopt the same process for treating diesel-engine emissions used by its rivals in an attempt to reverse falling truck sales and regulatory uncertainty that has caused its stock price to collapse and made the company the subject of takeover speculation.

Observers say the company’s fate hinges on the success of its much-maligned EGR engine, which has been saddled with mechanical problems and unable to get Environmental Protection Agency (EPA) certification.