The answer is yes, you can tell. It gets even better with that fact that when it comes to all Volvo models, you can tell if something is wrong with any major component from the engine and the transmission all the way to the exhaust and even the CV joint. That’s because Volvo’s hardly ever surprise you with a broken down system out of nowhere. Red flags and signs precede total system failures, so either the check engine light will turn on or you will notice something strange each time you drive especially when you engage different gears or accelerate. Read on to learn more.
Why Engines Misfire
It is important to first understand why engines misfire before learning the telltale signs of one that’s on the verge of misfiring. Spark loss, uneven air to fuel ratio and lost compression stand out as the main reasons why engines misfire. Faulty spark plugs, a cracked distributor cap or a fouled up plug wire can all cause spark loss. Compression loss on the other hand, which happens when excess air fuel mixture escapes from the cylinder, is often caused by a blown head gasket or a leaky exhaust valve. This too, can cause sudden engine blow out. That’s because air that is too thin to burn translates to a gunked up fuel injector, a weak fuel pump, a chocked off filter or an air leak.
Air and fuel mixture can also be too rich, though this is not so common and it will most likely affect all cylinders, not just one. A Volvo diagnostic scanner can easily pick out the faulty cylinder. However, this is just one step, the first actually in figuring out where the real problem is.
Struggling Up An Incline
Your vehicle should not struggle up an incline. Such behavior is usually a clear sign that the fuel filter is clogged. As the filter gets rid of gunk from the fuel, it accumulates dirt. The fuel pump is then forced to work hard to shove enough fuel through it. In high demand circumstances such as putting the hammer down or driving up a hill, the filter may not be able to deliver enough gas to allow the car to drive up a steep surface. A digital scope as well as a fuel pressure test is mandatory so as to fix the problem before it worsens.
Faulty Positive Crankcase Ventilation Valve
Volvos easily detect this problem and immediately turn on the check engine light. That’s because the Positive Crankcase Ventilation Valve is part of the emissions control system. It shouldn’t stick open as too much air will pour into the engine. This can easily contaminate the engine and eventually suffocate it. That is why you must never take the check engine light for granted especially if it stays open for more than 24 hours. Fortunately in this case, the valve is just as easy to clean as it is to replace. Buying a new one is also not so expensive.