Bmw z4 sdrive23 sound 2009

Description

Cause An BMW HVA element which is binding (element stuck in the extended position) will not allow avalve (intake or exhaust) to seat properly causing valve seat leakage. This type of BMW HVA failure may not cause a tapping/rattling noise but the customer complaint may be, "engine runs rough during the warm up phase and runs good when warmed up" and/or the "Check Engine" lamp is on. If the "Check Engine" lamp is illuminated due to a binding BMW HVA element(s) one or more misfire fault codes may be set in the BMW Engine Control Module (ECM/DME). Note: Basic troubleshooting should be performed First before checking for a binding BMW HVA element to eliminate all other possible BMW factors/ BMW components which could set the misfire faults such as low fuel level, a faulty BMW spark plug, etc. Troubleshooting Tips: • If there is a binding BMW HVA element in one or more cylinders as described above a misfire fault can typically be reproduced in the affected cylinderfs) by duplicating the conditions in which the misfire occurred according to the DME/ECM fault code description ie, at BMW engine temperature = X, engine speed = X, etc. • A binding HVA element which is causing a misfire in one specific cylinder will not "move" to an other cylinder and will always cause a misfire fault in the affected BMW cylinder. • Performing the "BMW Smooth-Running" test (found in the BMW DME control unit functions section of DIS) will assist in pin pointing a cylinder with a binding BMW HVA <b>...</b>

Keywords

BMW, 128, 130, 323, 325, 328, 330, 523, 525, 528, 530, 630, 730, x3, x5, Sdrive23i, Sdrive30i, Sdrive23, Sdrive30, Sdrive

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