05-24-2016, 01:42 AM
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#12 (permalink)
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Track Member
Join Date: Mar 2016
Location: San jose
Posts: 854
Drives: 2013 370z sport
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Quote:
Originally Posted by nis350
where was the leak on the manifold?
I would think that vacuum leak would effect the idling as well.
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Not always. You would be amazed at how far modern cars can compensate now days. A big clue would be if you reset te ECM and ten it runs like crap. If the vacuum leak comes on slow and gets larger over time then the ECM can constantly compensate and in theory should throw a code for fuel trim out of spec but not always. A good example is vw 1.8t, they always crack at the PCV elbow and develop a leak yet no code and no obvious poor running. Disconnect the battery to work on something unrelated and next thing you know it won't run (starts and dies).
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