car hard to start after sitting for 30 minutes

As a fuel pump ages the pressure provided can be less that adequate to run the engine correctly. If it cranks but does not start sometimes a temperature sensor is bad and the computer cant figure out the proper amount of fuel to inject.

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That said heres a shortlist of possible culprits.

. Starts fine when cold and when only slightly warmed up. Hard Starting after sitting. This can be tested using a fuel pressure gauge which can be obtained at your local auto parts store for free in most cases.

Pleasedodgevan2 July 5 2016 1003pm 10. It was picked up the next day and driven back but then wouldnt re-start at Unifirst so I was asked to come check it. If you turn it off and sit a few minutes it starts instantly and goes great.

30 minutes or so when i got back to the car i noticed a considerable amount of oil from sitting there only 30 minutes. Sign up for FREE. Old dog 68 Member.

This can be caused by a weak battery or starter motor. The original complaint two weeks ago was that it was turned off at a route location then would crank over good but wouldnt re-start after 30 minutes or so. It was towed to a local garage and they replaced the fuel pump.

It fired up as soon as fuel hit the carbs and is running great. Apr 11 2021 1 Took the gtx out of hibernation today. Example drive 30 minutes stop for lunch go back out to start and will turn over 10-15 times before starting.

This problem is closely related to vapor lock. A weak or failing starter motor will cause starting issues. Out bound the car started A-OkIt had been sitting from about 730 Am till 1230.

Jump to Latest Follow. CCA is the Amps the battery can give at 0F for 30 seconds before dropping below 72volts. Examine the low voltage supply 12 V to the ignition and the high volts at the coils and the distributor insides for crap and the electronic control.

Up to 20 cash back cranks fine no codes cant find anything on the scanner it takes a long time to start once finally started if you shut it off and start it right away it fires up right away but let it sit 15 minutes and then its hard to start again it does start a lot easier though but fuel pressure is bleeding off when key off within 10-15 minutes fuel pump was changed 2-3. 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. In the first datalog car has been sitting for 20 minutes and i start it.

The car I referenced would run start fine after sitting still on a hot day. Car is hard to start and other issues after oil change. Two ounces or so id guess - and a steady drip every 5 - 10 seconds.

1999-2013 Silverado Sierra 1500. At the beginning a worn FPR or fuel injector may give in to pressure in the fuel line and then stop leaking. Car hard to start below freezing after sitting outside all night Post by snyderkj717 Fri Jan 07 2022 506 pm 05 Civic D17A2 problem is starting the car after its sat outside through the evening overnight in below freezing temps.

In the second datalog you can see me start it up again about 30 seconds after the last start and this time it starts right up. Thats because modern fuel injection systems operate under high pressure that must be maintained. I have always thought it was an initial fuel delivery problem.

Thread starter Old dog 68. Hard to start after sitting 30-60 minutes after engine is up to normal operating tempeture. Start date Apr 11 2021.

Minute cracks in the fuel line which leak fuel when under pressure. Its OK to fit a bigger battery in your car than factory specs but never fit a smaller one. So if your vehicle is less than about 35 years old you most likely have a fuel injected engine.

First check the terminals to make sure the connection is not loose or corroded. Hard warm starts can also be traced to a leaking fuel pressure regulator FPR or fuel injector. We stopped for about 30 minutes.

Hot or cold starting problems may depend on how the starter. When cold starts in 12 turn. Faulty Starter Can Cause Hard Starting.

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. I remember going to a lunch joint not far from the office where we worked. It takes several seconds to start but once it does I turn it off and try again.

There are lot of things that will cause this sort of problem. Now this is by no means a hard rule but carburetors really havent been common in new vehicles since the 1980s. Let up on the gas as if the engine starts.

60 months 72 months etc then replace the battery instead of wasting money on recharging or diagnostics since that may be the only cause of the starting problem. 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. Check the fuel supply that is the flow and the pressure in the fuel rail to and from the throttle.

Check the age of battery and if it is past its lifespan ex. As to highway driving and starting slowly after highway startingthis is possibly heat soak. Dead or very weak battery.

Starts fine when hot if it is started within 10 minutes of it being turned off. I have an 81 360 Cherokee that has always started hard after even sitting 8 hrs. 96 gtx hard start after sitting for 30 minutes.

A leaky fuel injector or improperly seated fuel injector seal. I think it is reasonable to expect fuel to evaporate from the carb in a warm engine but fuel sould be in. If you crank the engine for long enough the fuel rail may be able to build up sufficient pressure to overcome this condition.

So i took my time getting home and kept a watchful eye on the oil. To find out hold the gas pedal to the floor up to 10 seconds while you crank the engine. The car turns over but wont start when hot BUT ONLY after it has been sitting 30 to 45 minutes.

Sometimes a fuel pressure dampener may cause the same symptoms. In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors Chevrolet and GMC branded pickups crossovers and. When you shut the car down the cooling air stops flowing by and the coolant stops flowing through the engine taking heat away.

Fullsize Truck SUV - 1999-2006 GMT800 2007-2013 GMT900 Platforms. Here are the symptoms. The hard starting is probably going to end up being something becoming heat soaked.

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