In In order to help reduce the amount of engine emissions cars have what is called an EGR system, which is an exhaust gas recirculation system. The way it works is that exhaust gas is added back into the fuel/air...
Are Are you familiar with the EGR (exhaust gas recirculation) system in your car? If not, this is something all modern cars have. The purpose of this system is to greatly reduce the amount of emissions produced by your car....
The The automatic timing advance unit is a component in vehicles with diesel engines. Of course gas and diesel engines both work on the internal combustion principle, but they are quite different, and require different means of controlling the flow...
If your car has almost a quarter million miles on it it is quite plausible that it needs an engine replacement, Especially if it has been overheated. While it's possible to damage an engine by driving it with too much...
That will have everything to do with how far you drove without oil pressure. I can't give you a mileage figure, but as soon as the oil pressure goes away, continuing to run the engine is doing damage. The longer...
A loud knocking noise coming from the engine can be any of several issues. Having to put 5 quarts of oil in the engine means that the engine was completely empty, basically. The engine oil's main purpose is lubrication, and...
Hello, thanks for writing in about your Dodge Ram 1500. If you pulled the cylinder 4 plug wire and the noise got quieter then this is an indication that you have a bad rod bearing or piston pin on the...
In the interest of your safety, I would avoid driving your car. According to Chevrolet, the motor in that particular car is an interference engine. This means that, if the timing is off, the valves can make contact with the...
The code P0171 is due to the left bank of the engine running lean and has reached the rich limit for the ECM. Try to have the injectors cleaned and run only high quality fuel that has cleaning additives. This...
Hello. This could be an indication that your oil pump needs to be replaced. However, it could also indicate that your engine is going bad and needs to be replaced. I would recommend that you have a certified technician, like...
The noise you are hearing is a pretty common issue in these engines. The noise is caused by one or more of the cylinder head camstand cam followers along with the valve springs. This engine has high cam failures and...
When your car begins to knock due to a lack of oil, this could mean many different things, such as broken or bent valves, a bad camshaft, rod or main bearings, and many other different things. As you may know,...
When you say a knocking noise I assume you are referring to the engine. If the engine is indeed making the sound the first thing I would recommend is to check your oil level. This can be done by pulling...
First the location of the knocking must be determined. The fix will vary greatly depending on the cause of the noise. Suspension components may have become worn or broken. Brake pads with worn hardware can also make some noise as...
A knocking sound within the engine is likely caused by low oil. I would first start by checking the oil level to ensure it is full. If the oil is low, you can top it off and see if anything...
Hello. This is a safety mechanism that will not allow you to shift without having your foot on the brake. This is a pin down in the console attached to the shift lever that doesn't allow the shifter to be...
Hello. It sounds like there is something broken in the engine internally. A push rod could be bent, a lifter could be stuck, or the engine bearing could be messed up. Have your vehicle's noise inspected by a certified technician,...
The noise may be the serpentine belt tensioner vibrating, or the front engine damper is broken and causing a noise. If the noise is neither of these components, then an inspection would be needed to see what the possible cause...
Without actually hearing the noise, it is difficult to determine the exact cause of your concern. It could be low oil pressure, valve adjustment, bearing failure, etc. I suggest having a certified technician, like one from YourMechanic, determine the exact...
Hi. I will assume the car has a manual transmission in which case, there is a bolt underneath the shifter that helps the gear linkage pivot. Over time, this bolt can become loose which will create the extra play in...
Although it is unlikely to be the cause, I would recommend checking your engine oil level. If your oil level is low, the engine will not be lubricated sufficiently enough to function properly and will therefore make knocking sounds as...
Unfortunately without more information it will be difficult to narrow down why you are experiencing a knocking sound in your vehicle. In my experience Envoys have had many different reasons that could duplicate an engine knock. The most common is...
Hello, diagnosing a noise is a hands on jab and must be heard firsthand for a proper recommendation. The noise could be coming from and item on the belt drive or possibly the engine itself. To pinpoint the cause of...
