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How To Start A Car With A Bad Fuel Pump?

If you are driving your car and realize that it doesn’t accelerate properly even after your efforts, this must surely catch your attention. Further, if you face difficulties to start your car and feels some wheel’s jerkiness, this indicates something serious about your car. Well, without wasting much of your time, the dicey car’s performance is due to the bad fuel pump. Every now and then most of us have to deal with this problem, following the thought of how to start a car with a bad fuel pump?

Having a bad fuel pump is one common problem that most of us face. This concerns most of us, isn’t it? Is it really possible to start your car with a bad fuel pump? If you too are concerned with the same, here we are to help to know how to start a car with a bad fuel pump.

how to start a car with a bad fuel pump
How to start a car with a bad fuel pump

To begin with, we would strongly recommend taking the car to the mechanic to get the problem sorted completely. The best solution in the case of a faulty or bad fuel pump is to simply replace it. Continuing using a bad fuel pump will damage your car’s performance and you surely don’t want that, right?

What Does A Fuel Pump Do?

1. Definition

A fuel pump is an essential component of a car powered by internal combustion engine. Older motorcycle engines do not require any fuel pump at all because they have gravity feed fuel from the fuel tank or under high pressure to the fuel injection system. Where is the fuel pump located? Carbureted engines often use low pressure mechanical pumps that are mounted outside the fuel tank, whereas fuel injected engines often use electric fuel pumps that are mounted inside the fuel tank. Some fuel injected engines even have two fuel pumps: one low pressure/high volume supply to pump in the tank and one high pressure/low volume to pump on or near the engine.

Fuel pressure requires to be within certain specifications for the engine to run correctly. For example:

  • If the fuel pressure is too high, the engine will run rough and rich. It will not combust all of the fuel being pumped and make the engine inefficient and a pollutant.
  • If the pressure is too low, the engine will run lean, misfire, or stall.

2. What Does It Do?

A car engine burns a mixture of petrol and air. Petrol is pumped along a pipe from the tank and mixed with air in the carburettor, from which the engine sucks in the mixture. In the fuel-injection system, used on some engines, the petrol and air are mixed in the inlet manifold.

What a fuel pump do is that it draws petrol out of the tank through a pipe to the carburettor.

The pump may be mechanical worked by the engine – or it may be electric, in which case it is usually next to or even inside the fuel tank.

how to start a car with a bad fuel pump
Fuel pump draws petrol out of the tank to the caburetor

Symptoms of A Bad Fuel Pump

As tricks to get a fuel pump working, looking for signs of a bad fuel pump is the best line of defense against sitting on the side of the road waiting for a tow truck:

First, when you think you have run out of gas or there is a problem with the gas gauge, it may be the time that your fuel pump needs replacing.

Second, engine overheating is a not-so-obvious indication of a possible fuel pump failure. How does a car act when the fuel pump is going out? When the fuel pump is heated frequently within a few moments after turning the vehicle on, like when it is common with stop-and-go driving patterns, then the fuel pump may overheat and cause the engine to overhead too. Typically the car suddenly stop working after you may drive for 15 to 30 minutes, and the engine gets hot. If after letting the engine cool down it functions appropriately again — only to repeat the behavior — this is a firm sign the fuel pump is failing.

Third, bad fuel pump sound, unusual noises, sputtering or backfiring can also be indicative of a bad fuel pump. When the flow to the fuel injection system in the vehicle is not consistent, the engine will cause problems. Keep an eye for things like a hesitant start or take-off, or any problem when starting the vehicle.

How To Start A Car With A Bad Fuel Pump?

Most importantly, you must first check and confirm if your fuel pump is actually bad or not. There are a number of ways by which you can confirm yourself for having a bad fuel pump. The basic indication of having a faulty fuel pump is the low pressure in the engine. A faulty fuel pump will lower the required pressure and will disturb the ratio of engine’s air-fuel, which will surely hinder the car’s performance.

Running your car with a bad fuel pump will quickly burn out the pump’s motor. The overheating of the engine can also be one of the possible signs when driving with a bad fuel pump. But still, there are some solutions to know how to start a car with a bad fuel pump. Here’s what you can possibly try 

1. Use Fuel Pressure Gauge

This can be one of the best alternative solutions when you are a concern with the various ways to deal with bad fuel pump to start your car. Even the mechanics use this method when they are working on a bad fuel pump. Therefore, this method can be totally relied upon in case of a bad fuel pump.

All you need to do is to attach the fuel pressure gauge with your car’s engine. This will somehow let you start your car with a bad fuel pump along with giving an idea about the actual failing of the car’s engine.

how to start a car with a bad fuel pump
Attach a fuel pressure gauge to car engine

2. Applying Some External Pressure

Another possible solution relating to the concern of how to start a car with a bad fuel pump is to apply some external pressure to the car. The main problem with the bad fuel pump is that it reduces the required pressure for the car’s operation and thus causes problems with its performance.

Thus, the best solution that you can try against your need to start your car with bad fuel pump is applying some external pressure. The external source of pressure will maintain the required pressure level for the car’s engine to perform.

3. Maintaining The Engine’s Heat

Maintaining the heat in your car’s engine can also possibly be the solution for the need of starting your car with bad fuel pump. The main reason why your car starts, even with a bad fuel pump is that once the car gets cool, the fuel pump resets itself without the required pressure and heat. This results in immediate malfunction and disrupted car’s performance.

Thus, the best way to start a car with a bad fuel pump is to maintain a significant amount of heat in a car’s engine. This will reduce the frequent malfunction in the car along with stabilizing the car’s performance to the maximum.

how to start a car with a bad fuel pump
Try to keep car heat at the same level

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Though, it is not advisable to start a car or to look for possible ways for how to start a car with a bad fuel pump. The bad fuel pump, if not taken care of, can bring a number of problems and side effects to the car. The possible side effects that can result from having a bad fuel pump are:

  • Decrease car’s mileage
  • Frequent engine failures
  • Power loss
  • Surging
  • Engine sputtering
  • The rise in temperature of the car’s engine

Thus, to avoid all these side-effects, most of the automobile experts suggest avoiding using a car with the bad fuel pump. You can try the above-mentioned methods but the possible associated risks are too high. Get your fuel pump repaired at the earliest to avoid any of the possible side effects on your car and to enjoy an everlasting performance.

1 Comment
  1. Elisa Moore says

    I appreciate the information given in this article about the fuel pump in the performance of the vehicle. Fuel pump plays a key role in the performance of the engine by pumping the required amount of fuel to the internal combustion chamber of the engine. An abnormal fuel pump could not do so efficiently which may bring the vehicle to a halt. So, the condition of different components of the vehicle should be subjected to inspection and any signs which indicates that the fuel pump has some issues should be repaired immediately to ensure a continuous supply of the fuel to the engine.

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