Very easy to swap the vvt valve,but that will not guarantee to rectify the problem,more than likely it will be the vvt pulley/timing unit,this will involve the timing belt coming off.
The vvt valve is located under the upper timing cover,remove the cover and you will see the valve situated on top of the head,undo the connector and remove the 4 bolts and the valve will come off,alittle bit of oil will come out on removal.
remove gasket and ensure the area is clean.
Re-fitting is opposite procedure,ensure a new gasket is fitted.
Hope this helps
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Code is for the VVT or variable valve timing. Was the timing belt replaced recently. If so the timing belt is not on correctly. If it just happened it could be the valve it self, wiring to the valve/corrosion on connectors. Check the oil level as low oil could be an issue. If the belt was not changed recently try changing the oil and adding a qt of Rislone to the oil. It is designed to free up sticky lifters and could free up the VVT solenoid. Worth a try.
This model has one belt for the cam drive system, along with an oil-filled pretensioner. Additionally, these models have VVT (Variable Valve Timing) which consists of a PWM (Pulse Width Modulated) valve and associated plumbing to the hydraulic tappets. This system increases or decreases the amount of TDC overlap (cam timing) based on driving conditions resulting in enhanced performance and lowered emissions. The caveat is that one must be diligent about oil changes and usage of the proper weight oil to avoid clogging of the oil feeds to the tappets.
P0303 is a misfire on cylinder 3 - check the ignition and injector on that cylinder. P0171 means engine is running lean (probably related to the above). Start by checking the tune of the engine, verifying with a timing light that all cylinders have spark. Since these are coil over plug, swapping cylinder 2 with cylinder 3 should result in P0302 in addition to P0303 DTCs being set. If there's a problem with the VVT (Variable Valve Timing system) then there should be a DTC associated with that as well.
If you have spark, then it goes on towards a faulty injector. If both spark and fuel are present, it's possible that the VVT (Variable Valve Timing) system is freewheeling cylinder 3. Usually that implies the hydraulic lifter seals are faulty though there should be a noticeable valve tap at idle.
In any case, testing out ignition then fuel then ruling out VVT-related issues should resolve the problem completely. I have seen many of these have problems with the plumbing to the valve lifters getting clogged and that results in a dead cylinder.
Hello, I had the same problem. Do you have any codes? I am assuming your problem is the same as mine, so I'll proceed on that basis.
So, first you need to clean the VVT (Cam Adjust Solenoid). Use some intake cleaner, a brush, and some compressed air. Once clean, get a new gasket and reinstall. Then get the codes reset. You should be good to go.