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Car Stalling While Accelerating

The stalling occurs when the weather is cold wet morning. The possible reason for stalling is there is moisture on the distributor cap that causes the engine to misfire.


When the problem occurs on cold wet weather condition, usually this is because of the moisture on the distributor cap. The moisture forms inside the distributor cap when the car is parked overnight on a cold wet surrounding. The resulted moisture allows the electrical current to arc inside the distributor cap and causes misfiring of the engine and during acceleration arcing is become extreme which also cause the misfiring to become extreme enough to cause the engine stalling.

How to avoid condensation inside the distributor cap

Park the car inside the garage when rain is expected to pour. This will help prevent moisture accumulation inside the distributor cap.

If the stalling gradually becomes frequent during acceleration, the possible reason is that there is a possible vacuum leak.

Vacuum leak typically starts small and become worst as time goes by this is due to the pressure inside the engine. The vacuum created in the fuel system determines the amount of fuel an engine can get if there is a leak the air-fuel ratio of the engine will be out of specs and can cause the engine to hesitates and stall.

How to correct vacuum leak

Bring the car to a shop and ask the mechanic to check for the vacuum leak. Ask the mechanic to check the EGR and the PCV valves which is a very common source of a vacuum leak.

Car Stalling While Accelerating

If the car has fuel injection then the possible problem is a bad throttle position sensor. Throttle position sensor measures how far the driver has depressed the accelerator pedal. The data that the sensor detected will then be sent to the engine computer that makes the calculation. The result of the calculation will determine how much gas the fuel injection system should inject on the engine. When the sensor is bad the amount of gas to be injected into the engine will also be bad which may result is engine stalling when accelerating.

Removal and Replacement of Injection Pump

Removal of the injection pump 
1. The ignition switch must be turned OFF and the battery ground cable must be disconnected.

2. The no.1 cylinder must be set at Top Dead Center (TDC) on its compression stroke and the fuel line around the pumps must drain OFF. Do not perform the work when the engine is hot.

3. Parts like the air duct, intake manifold collector, and other parts that obstruct during the work to be done must also be removed.

4. Check the alignment marked on the injection pump against the idle gear, this is a must procedure before removing the injection pump. When the alignment marks do not conform to the specification then this is a possibility that causes the injection pump malfunction.

5. Before removing the injection tubes, mark the tubes corresponding to cylinder number.

Diagnose and Repair Car Air conditioning System

Principles of air cooling of AC system
The principle that is applied to the automotive air conditioning system is that when liquid turns into a vapor it will absorb heat so that the surrounding area cools down. It is similar to the principle that when a body is wet and the perspiration is exposed to the wind the body will feel cool.

Refrigerant flow
The illustration is shows basic structure of the air conditioning system of an automobile. The cycle is that the refrigerant changes state from liquid state to vapor state and back to the liquid state again. The liquid becomes gas when the refrigerant absorbed heat and the surrounding becomes cool, then the gas is compressed making the refrigerant temperature to rise, now as the gas cools down it will return to liquid state.

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