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Scion FR-S, Subaru BRZ rough idle issues require ECU reflash

by Jonathon Ramsey (RSS feed) on Oct 5th, 2012 at 11:30AM

The Subaru BRZ and Scion FR-S have been struck by a minor gremlin, but the repair is turning into an episode that ends with "Stay Tuned" rather than a definite conclusion. Automotive News reports that a software mapping hiccup can cause the adaptive engine ECU to get out of whack with the engine, which can, in turn, cause rough idling and stalling. Toyota said the issue does "involve the variable valve timing," but both Subaru and Toyota say the issue is entirely about the software, that the ECU can develop a "handshake issue" with the engine after having an unfavorable "reaction to normal... Read More

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