car has trouble starting but runs fine

This can be caused by a weak battery or starter motor. 5 Bad Starter Solenoid.

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Last month I took it for a ride and the engine overheated.

. However the source may also be a mechanical fault for example a leaking valve or faulty. In order for an engine to start and run cold it requires more fuel than when it is hot. But if the battery doesnt have enough juice to start the engine or repeatedly.

My engine is a Toyota 5A FE and has no problem starting at. 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. If the car does not get the proper enrichment when cold it will have trouble starting or run poorly until the engine warms up.

The EGR valve controls the exhausts that should be recirculated into the engine. Heres reasons why your car might be slow to start. The most common reason a car wont start is due to a dead car battery or loose car battery terminals.

Turn the ignition on and see how much fuel the pump is pumping you shouldnt need much on a carb engine so. Slow to crank over. Help it alwyas happens at the most unopportune times.

Bad wiring Worn starter Charging system problems Bad battery. If the EGR valve is stuck open it may enter too much air into the intake manifold. Next move on to check your battery and all of its connectors and wiring.

2 Bad Vacuum Leak. My car runs fine for a few minutes then starts sputtering and loses a lot of horsepower. A bad battery will make your car start slower and slower over time as it outputs less and less power.

A mechanic will use a voltmeter to analyze the power level. Measure the health of your battery to make sure it isnt failing. When a car wont start most people will instinctively point a finger at the battery and many times they will be right.

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. An engine needs a minimum cranking speed to start if the starter or battery is weak the engine cranking RPM will be low which causes the engine to build compression slower and make it harder to start. Eegle1748 August 4 2009 1246pm 1.

An increase in viscosity of engine oil in the cold also causes slow cranking that leads to taking time to start or warm up engine. Check your battery output voltage with a. If it starts and runs at all then you need to check the catalytic converter and muffler as one of them is blocked off inside and it most likely is the cat.

It doesnt appear to be the fuel pump. I took it to the service station and the guys there fixed the overheating problem -- the thermostat was stuck. If I start it in the morning -- no one has used it for about 12 hours -- the car starts perfectly with a smooth key turn.

Using lighter viscosity oil such as 10W-30 is a better method to solve this problem. The simplest test would be to take the fuel line off the carb and put it in a jam jar. Our 1999 Cougar runs fine but randomly after stopping and shutting down wont restart.

After 30 minutes it starts right up. This cylindrical wire coil may become worn out as time goes on. The most common causes are problems in the ignition for example a bad ignition coil or fuel system for example a clogged fuel filter.

This can cause the mixture to get too lean which will also therefore cause the car to start and then die after a couple of seconds. 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. This could be due to a malfunctioning or faulty alternator or a low battery charge.

It can also be caused by a bad starter but if it cranks but wont start it could be caused by a faulty spark plug or a clogged fuel filter. In addition a fuel injector or weak battery may be reason of such an engine-starting problem. It doesnt stall but the engine sounds rough like an old 80s car.

Since then I have this strange problem with it. This condition where the engine needs more fuel cold is called cold start enrichment. When your engine cranks but wont start or run it could mean your engine is having trouble producing a spark getting fuel or creating compression.

If the car cranks but wont start the problem lies with one of the components of the chain reaction described above. Your car wont start if the cable connections on. Have to wait 30 minutes.

The starter solenoid is responsible for transmitting an electric current within the starter system. Usually when you hear the car continuously cranking the starter motor is not the culprit but another part is. When this happens it wont allow fuel to get to the engine cylinders and the truck to start.

Batteries do wear out to the point they cant hold a charge and they are a good place to begin when diagnosing a no-start situation. If your car does run fine and there are no signs of leaks smells or bad wiring this could be your issue. If your battery is dead then you will be experiencing a rapid-fire while turning the ignition to start your car.

If this were to occur it will be difficult for the electrical components and engine within the vehicle to start up. A night of rest lets the car become drivable again for a few minutes but then the issues show up again. 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.

Pull the o2 sensor out of the exhaust pipe if possible and see if the truck will start. 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. If the battery doesnt pass the test you dont have a good battery and will need to replace the dead or weak battery.

Enrichment meaning a higher ratio of fuel to air. Here Are Common Reasons Why. The most common causes are related to the following components.

These complaints are mysterious.

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