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The Terminator
Engine/Tuning
03 Cobra Swap in GT Help. P0171, P0174
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<blockquote data-quote="vr4" data-source="post: 16858547" data-attributes="member: 45270"><p>That is nearly always a vacuum leak. I'm also leaning towards pcv under the intake. Monitor stft and o2s11/o2s21 at idle while spraying brake clean under the intake. You should see fuel trims climb and o2s respond.</p><p></p><p>Even a missing oil cap or dipstick can cause it.</p></blockquote><p></p>
[QUOTE="vr4, post: 16858547, member: 45270"] That is nearly always a vacuum leak. I'm also leaning towards pcv under the intake. Monitor stft and o2s11/o2s21 at idle while spraying brake clean under the intake. You should see fuel trims climb and o2s respond. Even a missing oil cap or dipstick can cause it. [/QUOTE]
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03 Cobra Swap in GT Help. P0171, P0174
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