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| Ours did that . We replaced the one way valve at the ecm , added an extra one inline , etc etc same issues .
Finally, when we put a clear fuel line on the suction from tank we noticed air bubbles . The suction hose from tanks although looking perfect had deteriorated and were leaking air whrn under vacuum . They are a cloth type line and visibly looked fine . We just made up new lines with hydraulic hose and solved the problem “ | |
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n14 in international truck
