car hard to start after sitting for 30 minutes

Look for puddles of fuel under the car or the smell of fuel when starting. If so it could have a vacuum leak.

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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.

. Check All Exterior Lights. If it helps then you may have a leaking fuel pressure regulator or fuel injector sending fuel into the intake on hot shut down. 1994 CHEVROLET CORVETTE 33000 MILES Hard to start after sitting 30-60 minutes after engine is up to normal operating tempeture.

An engine burns fuel most efficiently at a. Your fuel filters should be. If its there replace the FPR.

Corroded or loose engine ground connection. When at normal operating tempeture and shut off it will restart with 12 crank. 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.

You need to test the fuel pressure at the test port on the fuel rail. Watch pressure to see how fast it drops off after key off. There could also be a fuel line leak.

I suspect your fuel pump or regulator are failing. Now this is by no means a hard rule but carburetors really havent been common in new vehicles since the 1980s. Batterys good replaced alternator.

Posted June 6 2012. After this when I try to start it it makes that noise like it is trying to start but the actual ignition doesnt happen. If the pedal on the floor doesnt help check for spark.

Bad Coolant Sensor Will Cause Hard Cold Starting. The coolant sensor plays a pivotal part in engine management its reading is vital for cold starting. The other possibility is heat soaked ignition components.

A forum for the legendary Nissan Pathfinder and Infiniti QX4. To do this turn the key to the run position but dont crank the engine. Example drive 30 minutes stop for lunch go back out to start and will turn over 10-15 times before starting.

If this stops the problem your fuel lines are likely losing pressure. The ECU fuels the engine based on the coolant sensor reading. 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.

Todays gas evaporates at room temperature so after a week or so the bowl is empty or nearly so. Definitely start with the codes. Before starting your car after it has sat idle for a long time be sure to check your engine oil level.

For the hot start hold the gas pedal to the floor while you turn the key to see if that does anything. The fuel filters should also be inspected for blockage. I have to push the accelerator pedal right after turning the key to get it started.

An electric fuel pump neatly solves this problem and I dont consider it a crutch. So if your vehicle is less than about 35 years old you most likely have a fuel injected engine. If you can start the vehicle readily when cold by.

Engine control system problems. Bret Bodas on January 12 2010. This may be from a fuel pressure issue.

The easiest way to do this is to grab a friend or family member so one person can activate the. Cranks but wont start. It usually takes me about 15 minutes to start it up again.

When the car does start is the idle even or does it fluctuate up and down. Leave the key in this position for 10 seconds then turn it the rest of the way for ten seconds. When you shut off a warmed up engine fuel pressure needs to remain in the fuel lines otherwise you will get vapor-lock this is when the liquid fuel turns into a gas in the fuel line and a fuel pump can only pump liquid not gas so the engine.

Compare normal running pressure to that at cold start. 2001 QX4 4x4 2003 Jaguar XJR 2014 Cadillac ATS 20T 6MT. Repeat this a few times before starting the engine.

Truck wont start after sitting overnight. Corroded or loose battery terminal or cable. It takes some cranking for the mechanical pump to pull gas up from the back of the car and refill the bowl which is why it takes so long to start.

Start the car drive around for 15 minutes at least and then park and read the voltage engine off. Hard to start after sitting. Its possible that re-starting the engine will be tough as well.

It could be the check valve in the system which would necessitate the fuel pump replacement. Pull the vacuum line off the FPR and check for presence of fuel. Vapor lock in the fuel system.

If your car is hard to start when warm you can trace the issue to one or more several potential faulty components for example. However if I drive it around 30 mins stop the engine and then try to start it again it almost doesnt start at all. When you shut the car down the cooling air stops flowing by and the coolant stops flowing through the engine taking heat away.

Hard to start after sitting. Wed Oct 04 2006 530 pm Car. It could be map or maf sensors or o2.

These control the fuel mix and if its off it make a hard start. 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. Its highly likely that your engine may die shortly after starting if the fuel lines or the pump have any leaks.

The hard starting is probably going to end up being something becoming heat soaked. When cold starts in 12 turn. In addition to this when driving the RPM seems to randomly drop off often and the car also jerks frequently especially when I press on the pedal quickly.

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