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Old 07-17-2018, 10:25 AM   #18
Rich84
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Join Date: Mar 2012
Location: Woodbury, Ct.
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Re: 6.0 Swap Stumbling Idle

The O2s appear to be functioning properly. The pcm goes into closed loop quickly. My tuner was not concerned with the heater circuit issue. He made it sound like it was throwing a code due to something he did or did not do with the tune.

Is it correct that the heater circuits are most important at startup to get the system into closed loop quickly ?
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