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You are probably hearing the "Spring Test." During this test the ECM operates the throttle to check if it can react to the command and return to the default (home)
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02-15-2013, 02:49 AM
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Base Member
Join Date: Aug 2011
Location: Bay Area, CA
Posts: 239
Drives: 2015 370z
Rep Power: 10080   |
You are probably hearing the "Spring Test." During this test the ECM operates the throttle to check if it can react to the command and return to the default (home) position. This self-test is used by the ECM to determine that the spring and motor inside the throttlebody are working correctly.
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