car hard to start after sitting

Thursday, May 12, 2022 Edit

If so it could have a vacuum leak. My 73 350 4bbl Quadrajet is hard to start after it sits for more than a couple of days.

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John Eberly Well-Known Member.

. But if your vehicle has a hard time starting after sitting for just a few hours it can cause an extra layer of confusion. There could also be a fuel line leak. Looking like a cylindrical coil of wire basically solenoid is a component to bridge the connection and allowing power to flow from the battery to the starter.

Were starting here because fuel delivery is among the most common reasons for a car not to start especially after its sat for a while. Before starting your car after it has sat idle for a long time be sure to check your engine oil level. The most common reason for a car not to start after it has been sitting for a period is that the fuel pump isnt doing its job.

A difficult start could be due to a number of things from a dying battery to a faulty starter. Mario GutiérrezGetty Images 5. To verify this next time just turn the ignition on and off without cranking a few times.

When this happens one of the most common causes is. Check filter installation for seal not sitting properly loose fuel line fitting pump installed correctly flow wise filter installed correctly flow wise air getting in to fuel lines. I think it is reasonable to expect fuel to evaporate from the carb in a warm engine but fuel sould be in.

Thats where the air comes in and mixes with the fuel for a powerfully explosive ratio. Check All Exterior Lights. If there is not any.

It acts like there is no fuel in the carburetor and needs to crank for several 4 tries before it starts. It also explains why his vehicle starts right away after being shut down but wont start after sitting for an extended period of time. The fuel rail bleeds back into the tank and so on the first crank the engine does not get enough fuel.

If the engine starts you got a fuel pump with a bad anti drain-back valve. These control the fuel mix and if its off it make a hard start. Kenm455 Gold Level Contributor.

So if your vehicle is less than about 35 years old you most likely have a fuel injected engine. Slow to Start. If the power is not in the battery then the car battery will show 312 volts and the car will not start.

My guess is the fuel pump diaphram is goingallowing the fuel to drain back. Repeat this a half dozen times and then try starting the engine. 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.

The engine is stock except for an HEI distributor GM. The thing you are looking for is indicated by the initial hard start but when started runs ok good fuel to the engine eventually and then by the fact that if the engine is allowed to sit for a long period the problem. When you shut the car down the cooling air stops flowing by and the coolant stops flowing through the engine taking heat away.

Mike B in SC Well-Known Member. However if I drive it around 30 mins stop the engine and then try to start it again it almost doesnt start at all. Most common is a leaking check valve in the fuel pump.

Once it starts it will start instantly anytime afterwards until it sits again. I have to push the accelerator pedal right after turning the key to get it started. Hard starting makes getting around difficult.

If you suspect that your car might have issues with your fuel delivery you can always check them yourself. It could be map or maf sensors or o2. The vehicle would have to completely build fuel pressure again before starting.

When the car does start is the idle even or does it fluctuate up and down. Is The Engine Getting Fuel. Ethanol can accelerate the deterioration of the check valves in the pump.

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. Then comes the second crank and the system is primed. Check that your headlights fog lights high-beam lights brake lights reverse lights and indicators are all working before you head out on the road.

The easiest way to do this is to grab a friend or family member so one person can activate the. That is why your car struggles to start if solenoid is broken or worn out. This means that if your engine isnt getting enough air due to an expired engine air filter or a faulty mass air sensor it may not start.

If your car struggles to start but runs fine this is a sign of a battery issue that can enhance the cars performance issues. The hard starting is probably going to end up being something becoming heat soaked. The next time you go to start the engine after it has sat turn the ignition switch on for two seconds so the dash light turn on and then turn the ignition switch off.

Now this is by no means a hard rule but carburetors really havent been common in new vehicles since the 1980s. Look for puddles of fuel under the car or the smell of fuel when starting. As you know by now the battery is responsible for producing the power to start the car.

You need to if the injector timing is correct. If your car wont start after its been sitting for just a little while theres a good. Couple this with a weak fuel pump and you get hard starting problems after sitting.

We will now discuss all the possible reasons why your diesel engine has a hard time starting. You Might Have Issues With Your Fuel Delivery. If that check valve is leaking causing the rail to loose fuel pressure overnight that would explain his extended crank time.

Car is hard to start after sitting for a week might have found a solution. I have always thought it was an initial fuel delivery problem. Once that happens it can take a LOT of cranking of the engine to refill the carb fuel.

Thats because modern fuel injection systems operate under high pressure that must be maintained. You can check this by using a scan tool. I have an 81 360 Cherokee that has always started hard after even sitting 8 hrs.

As others have noted the real problem is that fuel evaporates when the car is not driven regularly.

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