Allgemeines » Misfiring Under Load

When you purchase a used or pre-owned car Brayden Schenn Jersey , truck, or SUV, and order a vehicle history report, you may see an item on the report labeled "drivability." It will often be accompanied by a rating. This confuses a lot of people. Most drivers intuitively understand labels such as "4-wheel alignment," "coolant flushed Scottie Upshall Jersey ," and "no structural damage." But, few know how to interpret "drivability."

The term actually encompasses an assortment of criteria that measure a car's responsiveness to normal driving conditions. It includes cold starts, "no crank" conditions, hesitation, and similar performance issues.

Below Joel Edmundson Jersey , we'll take a closer look at each of the main areas addressed by a vehicle's drivability rating. You'll find the following information valuable in the event you decide to shop for a pre-owned car.

Does The Engine Crank?

If the engine fails to crank, the culprit is likely the starter or the battery. Starter problems often develop gradually. You may start noticing a slow crank condition or odd sounds coming from the starter. Issues related to the battery can range from a lack of juice to poor connections due to corrosion.

It Cranks, But Fails To Start

If your vehicle's engine cranks, but does not start, the problem involves the spark Carl Gunnarsson Jersey , fuel delivery, or compression. For example, your ignition system might be malfunctioning; your fuel pump may be failing; you may have a vacuum leak reducing compression. Each of these factors will prevent your car from starting even if the engine manages to turns over.

The Car Stalls Out And Dies

Suppose your engine turns over and your car starts, but it stalls shortly thereafter. This type of situation suggests the ignition system is fine. However, something may be wrong with the fuel. The problem may involve the fuel pump Jaden Schwartz Jersey , water-heavy gasoline, or a failing relay.

Engine Hesitates When Accelerating

There are many factors that might contribute to hesitation while accelerating. For example, a failing fuel pump can play a role as can a clogged catalytic converter. The manifold absolute pressure (MAP) sensor may be faulty or the exhaust gas recirculation (EGR) system might be defective. There may also be a vacuum leak impacting compression.

Another problem similar to hesitation is an overall lack of power under load. For instance, while pulling something heavy up a steep incline, it might seem as if your vehicle is running out of gasoline. The potential causes of this issue are the same as those which cause hesitation: obstructed catalytic converter Vladimir Tarasenko Jersey , failing fuel pump, EGR problems, etc.

Misfiring Under Load

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