moncler outlet uk Troubleshooting VW Car Problems

by / Thursday, 12 November 2015 / Published in Tech

Troubleshooting VW Car Problems

One bad spark plug in the engine would cause the car to idle roughly but still enable it to run. VWs tend to have very high cylinder compressions, so their spark plugs are very important and fail often. Since they’re cheap, it’s best to go ahead and replace them. If it doesn’t help, you’ve at least prevented it from becoming a problem in the near future. Other possibilities are the coolant temperature sensor and the oxygen sensor located near the front of the engine. If the coolant temperature sensor is faulty it will send erratic readings to the Mass Air Flow Sensor, which would cause the car to take in too much or too little air. A faulty oxygen sensor would create a similar problem. Replacing both parts costs close to $15 and takes 20 minutes of your time as well as a socket wrench. The car should run smoothly afterward.

Most VW cars have trouble with their water pumps. This is because the internal impeller, which is a fan that moves water through the cooling system, is made of plastic and will wear away after only 35,000 miles of driving. Locate the water pump beside the engine; it should look like two pie plates set mouth to mouth. On the side will be a small weep hole. Once the water pump has gone bad, water will begin to drip from this hole. That will tell you it’s time to replace it. If the water pump is working, open your radiator once it has cooled enough to safely touch. Check the texture of the contents. If they’re goopy or oily, your head gasket is either breaking or broken. The head gasket separates your coolant from your engine’s oil. Should the two systems mix, your engine will have to be flushed of all oil, and the entire cooling system must be replaced. Keep in mind that this is extremely rare in VWs, but it still does happen.

If the VW dies while driving it’s either a result of a timing belt snapping or a boost leak. If you’re moving at high speed when the VW dies, then it’s more likely the timing belt. If you’re just getting under way when the engine dies, it’s a boost leak. To check for the timing belt, open the hood of the car and flip up the timing belt cover. Try to crank the engine gear. If, when cranked, the camshaft next to the timing gear won’t budge, then the timing belt between the two has broken and must be replaced by a mechanic. A boost leak problem is a leak in the fuel/air mixture lines once it has left the turbocharger. If your VW model doesn’t have a turbocharger, then the timing belt is your only possible answer. One or more small leaks may bleed your engine to death, though since the fuel is atomized you wouldn’t actually see a line of fuel dripping from your car’s undercarriage. If, after your car has been sitting for a few hours, it still smells strongly of gasoline, then you likely have a boost leak and will need to bring it in to a shop to have your boost lines looked at.

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