car hard start but runs fine

If there are issues with either or both the car struggles to start but runs fine. The most common reason that your car might be hard to start is that there is low fuel pressure.

What To Do When Your Engine Won T Stay Running

Engines with Throttle Body Injection TBI System.

. The summary is this. Maybe there is something wrong with it causing it to not get off cold start mode which is fine when the engine is cold but once it warms up floods the engine and makes it hard to start. Corroded or loose engine ground connection.

Up to 8 cash back The most common problem encountered that will cause this problem is a fuel pump in the fuel tank not holding fuel pressure up to the engine for any length of time. The ECU fuels the engine based on the coolant sensor reading. Once the engine starts and the fire in the cylinder cleans the plugs it runs fine.

If the engines fuel injectors are not getting enough fuel then the combustion is not occurring in the engine and it will not be able to run on its own. What i do know is. This can be tested using a fuel pressure gauge which can be obtained at your local auto parts store for free in most cases.

You may have the. This throws off the expected air fuel ratio and causes the vehicle to run lean in other words too much air for the amount of fuel that has been injected. If the car cranks but wont start the problem lies with one of the components of the chain reaction described above.

Corroded or loose battery terminal or cable. 5 Bad Starter Solenoid. How can you tell if the alternator has a problem.

If your car is hard to start when warm you can trace the issue to one or more several potential faulty components for example. The starter solenoid is responsible for transmitting an electric current within the starter system. His car is hard to start just a continual cranking more often than not but when it does start it runs normally.

The fuel system needs to hold pressure to the fuel injection in order to start after sitting. An electrical component like the dome light or other interior lights may start bright and then go dim. Why does my car lights go dim and the car dies and wont start for a bit then starts and runs fine alternator and battery test good.

A hard-start condition may also come from insufficient fuel. Such as air bag light and gas light with full tank etc Plus if you have electric locks and windows they may have some glitches. Remove the air filter housing cover and filter.

If it is an EFI which just about every car has been for a long time car maybe the car has a bad 02 sensor if it is a very old car it could be a carburettor car with a carburettor problem. B Quick Fuel System Check. It should hold for weeks but for sure at least overnight.

Whats happening with mine is the fuel pressure regulator or some component in the fuel metering system is flouling the plugs after sitting for several hours. 2 Bad Vacuum Leak. A loss of pressure over time will cause the fuel not to be at fuel injectors when starting.

A vacuum leak is a hole in a vehicles air intake system behind the mass air flow MAF sensor that allows unmetered air into the engine. You should hear the fuel pump run for one second when the ignition switch is turned to run. If your car does run fine and there are no signs of leaks smells or bad wiring this could be your issue.

It has an electric pump and that appears to be working. That is to insure fuel pressure is up for starting in case it dropped a little. Bad Coolant Sensor Will Cause Hard Cold Starting.

Low fuel pressure has various signs that can alert you to this issue. A bad battery will make your car start slower and slower over time as it outputs less and less power. Engine control system problems.

Vapor lock in the fuel system. Car hard to start but runs fine. This is the typical symptom for fuel pressure dropping when the engine is stopped.

Luckily for me my cars are running fine at this point but a fellow member who is also having problems with his computer and is having trouble accessing this site asked me to post for him. This can be caused by a weak battery or starter motor. Measure the health of your battery to make sure it isnt failing.

The hard start could be due to bad spark plugs a weak fuel pump restricted fuel filter restricted air filter dirty fuel injectors an out-of-range coolant temperature sensor sticking EGR valve faulty Idle Air Control IAC servo carboned up throttle plate and probably a few other things Im not thinking of right now. Usually when you hear the car continuously cranking the starter motor is not the culprit but another part is. Tuesday 14th April 2009.

This is another charging system issue like a dead battery that wont let you start your car. If this were to occur it will be difficult for the electrical components and engine within the vehicle to start up. This may be the problem behind your hard to start engine.

This cylindrical wire coil may become worn out as time goes on. Engine won run - bad fuel. As a fuel pump ages the pressure provided can be less that adequate to run the engine correctly.

The most common causes are related to the following components. This simple test will quickly let you know if you have enough fuel going through the system. If your car wont start but your battery is fine chances are you have a bad alternator.

If the battery is not grounded to the frame the car WILL run but will have issues starting and tends to cause some lights to come on even though those are not real problems. Next move on to check your battery and all of its connectors and wiring. Turn the ignition on and see how much fuel the pump is pumping you shouldnt need much on a carb engine so.

Up to 8 cash back There are many causes of hard starting but illustrative ones are a faulty engine coolant temperature switch sensor malfunctioning idle air control IAC valve vacuum and EGR leaks inadequate fuel delivery or pressure clogged fuel filter injectors and contaminated or old gasoline.

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My Car Runs Good When It S Cold But Stalls Once It Warms Up What Gives

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