I can hear knocking noises coming from the engine. What is the matter with my engine?

What you are hearing is called a spark knock. Specifically, it is the pinging, rattling, or knocking noise you hear when your car is accelerating or carrying a heavy load. What it means is that the fuel is exploding or detonating. Fuel is supposed to be burning smoothly and not exploding erratically. This is what happens when there's too much compression and heat inside the combustion chamber. It is almost similar with preignition; but in preignition, the fuel ignites before the spark comes due to a hot spot in the combustion chamber. Both are very bad for the engine because they can cause costly damage to the engine and its components.

In your Dodge D350, the most common cause of a spark knock is too much carbon build-up in the combustion chamber. What you need to do is to treat the engine with top cleaner or put in a fuel system additive that can remove carbon build-up in the combustion chamber. This usually does the trick. However, if the carbon build-up is still there, you have to bring it to a repair shop and have it cleaned there. Another cause of a spark knock is engine overheating. If the engine becomes too hot, it can cause the fuel to detonate. The same goes if the fuel and air mixture is too lean.

I just filled my tank with fuel, but why does my fuel gauge say my fuel tank is empty?

If the fuel gauge reading doesn't change after filling up your fuel tank, there might be a problem with the gauge itself. The problem can also be coming from a faulty instrument voltage regulator, faulty sending unit, wiring problem, or a poor ground connection.

If the fuel gauge is not giving you the right fuel reading, you need to have it fixed as soon as possible. Nothing is more annoying than running out of fuel when you are running late—and without you anticipating it.

I have read that one of the most common problems with Dodge D350s is transmission failure. How do I prevent it from happening?

Checking your D350's transmission fluid using the dipstick is one of the easiest maintenance procedures you can do to prevent transmission problems, not to mention inexpensive too. Read your owner's manual to know where the dipstick is located. Also, the best time to check the transmission fluid is when the engine has warmed up. Make sure that the color of the fluid is pink, and it is clear. If it is deep purple or brownish and if there's a burnt smell coming from it, it needs to be replaced since it can no longer work properly. Also check the level of the fluid. You need to top up your fluid if it is low but make sure that you fill it only with the right amount. If you put too much fluid, it can churn and create bubbles, which is bad for your transmission.

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