Accent 1.4L A/T Engine Knock Now Due to CVVT Defect. (According sa Casa)

[niky]

She should get a second opinion.

If the CVVT switches over to high power mode (larger valve opening and overlap, more advanced ignition timing) too early (low rpm, low throttle position, high load), then the engine will be sucking in too much air and will run lean, causing knock. But an instrumented scan of the engine during operation should show when the CVVT switches modes. At the very least, put the car on the dyno and run it through a drive cycle with the OBDII plugged in and an AFR sensor shoved up the tailpipe to show that this is really the case.

Just guessing that it's a defective CVVT without showing error codes or performing the above demonstration is simply irresponsible.

[weisshorn]

hehehe.. ala swerte pala ang trouble shooting technique nila!! Wala silang maipakita na error code o ebedinsiya that lead to the opinion na variable valve timing ang problema.. what the f**k..