Why does my VW Jetta keep throwing code?
Here are the most common problems that will throw the code. They are presented somewhat in order from most to least likely to be causing the code: Bad Spark Plugs – Spark plugs are one of the most common causes of P0302. Take a look at the electrodes and see if they are in good shape.
What causes a Volkswagen Jetta cylinder to misfire?
Vacuum leak– If your Jetta has a vacuum leak, it can be very difficult for it to get the right air/fuel mixture. This will cause the cylinders to misfire and it’ll throw the P0302 if the leak is around that specific cylinder on the intake manifold.
What causes a p0302 code on a VW Jetta?
There are quite a few things that can cause the P0302 trouble code to trigger the Volkswagen Jetta . Here are the most common problems that will throw the code. They are presented somewhat in order from most to least likely to be causing the code: Bad Spark Plugs – Spark plugs are one of the most common causes of P0302.
Can a faulty fuel injector cause an engine to misfire?
A faulty fuel injector will cause your engine to misfire, and these can be pretty difficult to diagnose without flow testing them. Injector problems are not very common on newer cars, and because of this, you want to check out the other possible causes first, but it is absolutely worth checking.
What happens if you misfire a VW Jetta?
The P0302 trouble code will trigger the Jetta’s service engine soon light. The vehicle itself may begin to run rough. It depends on how serious the misfire is. The vehicle may produce excess vibration, especially at lower RPM. Fuel mileage may suffer. You may smell raw gas coming from the tail pipe.
Why does my VW Jetta have rough idling?
It started acting funny when driving and car would loose power. So I replaced spark plugs , spark plug wires and battery. It was fine for a few months . Then it started idling the ignition coil. Worked ok then started shaking cooling is worse. I took it and had it diagnosed was misfiring. So I had it replaced , got an oil
Why does my VW Jetta keep acting funny?
I have had my jetta for two years. It started acting funny when driving and car would loose power. So I replaced spark plugs , spark plug wires and battery. It was fine for a few months . Then it started idling the ignition coil. Worked ok then started shaking cooling is worse. I took it and had it diagnosed was misfiring.
Why are my spark plugs bad on my VW Jetta?
The first time was shortly after I had the 40K service done at the dealership. Three of the four spark plugs were bad. They replaced them and it was fine for about 10K miles and then it happened again. Only one spark plug was bad this time. It was broken… Not sure how. The dealership has no idea what is happening.