The same glitch can be the outcome of an issue with the engine control system. So, diagnose it if the MAF sensor turns out to be fine. In fact, it is hard to detect this symptom of bad mass airflow sensor when the control system runs smoothly. You have to look into a change in ...
A leaky gasket also meddles with the idling of a vehicle. It either idles too quickly or stalls altogether. The car cannot regulate the idling speed due to the disproportionate air-fuel ratio. You will also hear some light pooping noises that follow the bad engine performance. This phenomenon...
In cold weather, if the engine temperature drops close to the lower limit of the operating range (194°F or 90°C), the thermostat closes again.Many modern cars use an electronically controlled valve called "coolant control valve" instead of a conventional thermostat. The coolant control valve...
When there are symptoms of a Bad Engine Control Module, such as erratic engine behavior, reduced fuel efficiency, or failure to start, the problem often lies elsewhere. In many cases, these common symptoms can be traced back to a malfunctioning sensor or a faulty wire rather than a failure ...
The causes of bad EGR sensors are discussed below. Bad fuel can lead to decreased engine performance, improved emissions & potential harm to the sensor. Ignoring frequent maintenance of your car can lead to EGR failure. Over time carbon deposits can build up in the EGR valve & its linked co...
If the EGR system is clogged up, or the valve is stuck closed, the combustion temperature increases. This may cause pinging (detonation), as well as surging on light acceleration. In a diesel engine, a bad EGR valve is one of the causes of a black smoke. The Check Engine light might ...
Using an ohmmeter, test the diodes, both regulator diodes (triode in Delcotron) and rectifier diodes. A diode is a "one way valve" for electricity, so each diode should show some resistance reading on the meter one way, and no reading, or infinite resistance the other way. A bad diode...
Then, when you have a bad purge valve, there the toxic hydrocarbons would exit the internal system. Such a situation would not be good for your emission control tests. With more toxicity in the air, you would also be reducing yourcarbon footprint. If it is the purge valve that has been...
When the engine is idle, you have a lot of vacuum inside the intake manifold, which helps the emissions get sucked out from the crankcase efficiently at lower speeds. How can a PCV valve go bad and what happens when the PCV valve goes bad?
An air leak anywhere between the engine intake and the mass air flow sensor is often called a 'vacuum leak' or 'intake leak'. Common examples of vacuum leaks include a ripped or cracked intake boot, leakingintake manifold gaskets, stuck-open or defective PCV valve or ripped PCV hose, crack...