Bronco not staying started after sitting
Car has been sitting for roughly 2.5 years. My main problem is that the Bronco cuts out when running at speed for approximately 45 minutes. Once it stalls, I have to wait about one hour before it will start again. My thinking is that I need to replace the fuel pump and fuel filter, and maybe drain all of the old fuel.
Experienced mechanics share their insights in answering this question :
If your vehicle has been parked for that long, draining the fuel and changing the filter might be a good idea. But if it is running for 45 minutes, this is probably not the issue. When a vehicle runs for a while and turns off, it might mean the issue is temperature related. Electronic modules were common failure items in vehicles with the 5.0L. The ignition control module controls the spark that ignites the fuel in the cylinders. Once the module gets hot, it stops working and your car dies. After it cools down, it goes back to normal until it gets hot again. Eventually it will stop working all together. These modules have solid state wiring and require special testers to check them. Seek the help of a professional technician, such as one from YourMechanic. They should have all the proper tools and information to properly test the module on your vehicle and provide an accurate diagnosis of your starting issue.
How to Identify and Fix Common car Problems ?
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If your foot valve is leaking your pump may lose its prime between starts. Replacing a faulty valve may solve the problem. Obstruction-One possible reason your pump may be losing its prime is an obstruction or blockage in a line. Debris blocking the suction strainer or foot valve is the most common cause.
If the fuel pump is not coming on, and the fuse and relay are good, then it may be possible that there is a problem with the pump or the fuel pump circuit. The first thing I would do is check to make sure that there is power to the fuel pump circuit, and that the relay is in fact sending power to the pump.
Pump components can corrode, especially if the vehicle sits for long periods of time. This is doubly true if ethanol is present in the fuel. The corrosion process starts with a little bit of moisture in the fuel in the tank.
Air pockets: When the fuel filter is replaced, it can create air pockets in the fuel system, which can prevent the engine from starting. To fix this, the air pockets need to be removed by bleeding the fuel system or using a priming pump.
Fuel pump failures can be caused by electrical faults, old age (wear) or fuel contaminants (dirt, moisture or bad gas). Fuel pump failures often occur without warning. Fuel pumps, injectors and pressure regulators are the three most commonly replaced fuel system components.
For the specification we must consult service-data, but the system should hold some pressure for about five-minutes.
An electrically actuated pump may fail due to a mechanical or electrical malfunction. If the fuel pump in question is working intermittently; I would suggest a loose electrical connection.
Gasoline breaks down over time, not only becoming less effective as a fuel, but also releasing gums and varnishes into the fuel system. Carburetors in particular are vulnerable to having their small passageways gummed up by these varnishes. And the longer the gasoline sits, the more varnish is created.
Can a fuel pump go out without warning? Absolutely! A car fuel pump will fail without warning more often than you may think. All things related to a car fuel pumps like the injectors, the pressure regulator, and the car fuel pump itself are the part that are most replaced with the fuel system.
Priming allows your pump to create the pressure that`s necessary for it to draw water in and pump it where it needs to go, but it also makes sure that there aren`t any unwanted leaks in your pump`s system while preventing backflow once the pump is turned off.
The fuel pump relay is controlled by the PCM by providing the relay with a ground. The PCM chooses to turn the relay on when it sees the motor is running. If the PCM doesn`t see an indication of the motor running, it will not supply a ground path to the relay and the fuel pump will not receive power.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Vehicle won’t start, once it’s jump started it only stays running until you turn it off, then it work start again without jumping.
Hi there. There could be two problems here. It is possible that your battery is bad and will not take a charge from your alternator while driving. In that case every time you shut your car off you will not have enough juice to start it again. Inspect your battery – it should have at least 12.5 to 13 volts to start your car, if it doesn’t you will need to replace the battery. The second problem could be that your alternator is bad and not charging your battery, in this case you will need to replace your alternator. Both the battery and the alternator can be tested in your car. If you would like to have the car checked for you, a certified professional from YourMechanic can come to your car’s location to diagnose the starting problem and proceed with repairs.
Fuel pump engages. Batery good, alternator good volts, jump start helps when wont start. Temp does not matter. Intermittent?
Hello. Thank you for writing in. There are several reasons your vehicle may only start when jump starting. The first and most common is a build up of resistance that is causing you to need a boost of voltage to get the engine started. This may be due to poor battery cables, a bad ground connection, a poor starter solenoid, and a couple of other issues. The first thing you want to do is perform a visual inspection of the starting system. Make sure there is no corrosion build up in the battery cables. You can also check the resistance across these wires and make sure you have a solid connection between components. You then want to make sure the starter solenoid is doing its job. It is responsible for taking the small amount of electricity sent by the ignition and turning it into a huge electrical charge that is strong enough to push over the engine with the help of some gear ratios in its favor. Do some more testing, and stick to the basics before assuming its something seriously complicated.
My car starts fine but always like once a month it doesn’t start it cranks ok but it will not start if I let it sit for 6 hours
What you are describing sounds like an ignition coil that may be failing. Ignition coils are prone to this type of erratic functioning or heat cycling when they are beginning to fail due to the temperature fluctuations under the hood which ultimately cause them to shut down causing the car to only run after cooling down for 30-40 minutes. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly The insulation develops small fractures that open when heated and close when cooled. When open, they allow shorting of coil windings and decrease or eliminate the coil’s ability to function. This process will repeat itself continuously until the coil ultimately fails completely and must be replaced. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your ignition system.
cold start problum. after started though it well start back up if not sitting more then few hours.
The fuel system needs to keep the fuel pressure in the injection system after you shut off the car in order for the vehicle to start back up without waiting for the fuel system to pressurize again.
There are three possible problems. The fuel pump inlet check valve built into the fuel pump is not holding pressure and allowing the fuel pressure to bleed back to the tank after you shut off the car. The next possibility is that the fuel pressure regulator is not holding pressure on the return side of the fuel system and is leaking. Lastly, one of the injectors is may not be sealing properly and leaking pressure.
A mechanic will need to test and isolate the fuel system to see if the regulator or fuel pump is bad. An injector may also be at fault which would require a repair.
You can try cycling the key on and off, four or five times slowly, and then try to start the car. This will help build enough fuel pressure to start it cold until you get it fixed.
If you decide to get this fixed, consider enlisting a professional mechanic who can diagnose your starting problem firsthand and fix it accordingly. Good luck.
Cranks over start than dies
The idle air control valve is a small valve on the engine’s intake system that reads the air intake as it comes into the motor. This is controlled by the car’s ECM which uses this information to make adjustments to the air/fuel ratio depending on various inputs such as outside air temperature, intake air temperature, load and various other things. As you accelerate, your car’s engine is receiving a much higher dose of fuel than when at idle and conversely, when you let off the gas pedal, there is a sudden change in this fuel supply as a result of your foot letting off the pedal. When this happens, the job of the idle air control valve is to bring this deceleration down to a slow and smooth idle rather than suddenly cutting off the fuel supply causing the motor to die. When the idle air control valve is not working properly, this cause a disruption in this process resulting in the engine not being able to idle properly. I would recommend having a professional come to your location to diagnose and inspect your vehicle.
Why does my car struggle to start every 4th to 5th time?
It sounds like your starting issues may be linked to a problem with air metering or fuel delivery. A clogged or malfunctioning idle air control valve may show some of the same symptoms you are describing. The idle air control valve can be stuck in a cold start position which may work well if the car has been sitting a few hours, but as the engine warms up there must be a regulation in airflow. Consider hiring an experienced technician like one from YourMechanic who can come out for a closer look at your hard start situation and offer a more personal diagnosis.
My Blazer will crank over but not start by itself. It needs starting fluid to start.
Hi there. If you have not replaced your EGR valve, mass air flow sensor or the TPS on your Blazer, you might want to start with these repairs. It is also possible that the throttle body itself is damaged, especially if you’re able to start it on fluid. If you want to avoid chasing parts and repairs, the best solution may be to have a professional mobile mechanic come to your location and complete a car is hard to start inspection.
I have a 2007 Kia spectra and it’s been sitting for 2 months and my husband just went to started it wouldn’t start
It sounds like you may have a faulty starter solenoid. A faulty starter solenoid will generally produce a clicking sound when turning the key. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. As electricity is supplied to the starter a small gear comes out and engages the flywheel to spin the engine over as you turn the key. When this fails, it may cause a clicking sound and will not allow the starter to engage the flywheel when you turn the key. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.