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Fox Body Mustangs
Extremely rich and rough idle
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<blockquote data-quote="MG0h3" data-source="post: 16476437" data-attributes="member: 164690"><p>Oh ok must have been a late 86 build. Thought 87s had the EFI. </p><p></p><p>So I know you replaced and then tested/confirmed the ECT as good to go. </p><p></p><p>I would check the 5V ref and ground as it should be a typical 3 wire sensor. </p><p></p><p>The 5V ref and ground are often shared so maybe you’ll find a problem there and it will lead you to the problem. </p><p></p><p></p><p>Sent from my iPhone using svtperformance.com</p></blockquote><p></p>
[QUOTE="MG0h3, post: 16476437, member: 164690"] Oh ok must have been a late 86 build. Thought 87s had the EFI. So I know you replaced and then tested/confirmed the ECT as good to go. I would check the 5V ref and ground as it should be a typical 3 wire sensor. The 5V ref and ground are often shared so maybe you’ll find a problem there and it will lead you to the problem. Sent from my iPhone using svtperformance.com [/QUOTE]
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Extremely rich and rough idle
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