car hard to start after sitting for 30 minutes

Im hoping someone can diagnose it. 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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The problem is intermittent but is getting worse.

. Fuel pump new regulator new filter presure test and hold for 20minutes injector check on fuel rail and was no leack for 30 minutes went block the return. A loss of pressure over time will cause the fuel not to be at fuel injectors when starting. It cranked a lot more than usual and limped its way to starting.

Hard warm starts can also be traced to a leaking fuel pressure regulator FPR or fuel injector. However if I drive it around 30 mins stop the engine and then try to start it again it almost doesnt start at all. A Bad Head Gasket Might Be Why Your Car Wont Start.

Sometimes a fuel pressure dampener may cause the same symptoms. It takes several seconds to start but once it does I turn it off and try again. Here are the symptoms.

Up to 25 cash back Car is hard to start after sitting for 2 or more hours - Answered by a verified Pontiac Mechanic. Last week the same issue happened again multiple times with longer cranking times. Up to 8 cash back The most common problem encountered that will cause this problem is a fuel pump in the fuel tank not holding fuel pressure up to the engine for any length of time.

They called me three days later and said the truck ran fine for two days but that morning had done the same thing on the route cranking but not starting after 30-60 minutes at a customer location. Hard to start after sitting 30-60 minutes after engine is up to normal operating tempeture. My 1995 38L v-6 bonneville is hard to start after its been run for at least 15 minutes.

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. Starts fine when hot if it is started within 10 minutes of it being turned off. I have to push the accelerator pedal right after turning the key to get it started.

And then the other day the dash indicator lights in the car went out and then came back in a few minutes. 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. 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 will not start until the fuel cools down and turns back into a liquid.

It could be the check valve in the system which would necessitate the fuel pump replacement. Let up on the gas as if the engine starts. When cold starts in 12 turn.

Starts fine when cold and when only slightly warmed up. One thing i do notice is that the fuel filter seems empty in the morning. I didnt notice the issue again until.

If I turn the car off for a few minutes it all seems to come back. If there is not any. The car turns over but wont start when hot BUT ONLY after it has been sitting 30 to 45 minutes.

My 73 350 4bbl Quadrajet is hard to start after it sits for more than a couple of days. This may be from a fuel pressure issue. First start with the choke it fires right up.

Mario GutiérrezGetty Images 5. 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. There are lot of things that will cause this sort of problem.

The fuel system needs to hold pressure to the fuel injection in order to start after sitting. 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. To find out hold the gas pedal to the floor up to 10 seconds while you crank the engine.

Normally it springs to life like any car. Check the fuel supply that is the flow and the pressure in the fuel rail to and from the throttle. This problem is closely related to vapor lock.

That is why your car struggles to start if solenoid is broken or worn out. If i let it sit 20-30 min it wont fire takes 3-5 sec. When you shut the car down the cooling air stops flowing by and the coolant stops flowing through the engine taking heat away.

Example drive 30 minutes stop for lunch go back out to start and will turn over 10-15 times before starting. Once it starts it will start instantly anytime afterwards until it sits again. Runs great otherwise no stumbling or fumblingTiming is at 8.

The fabled blown head gasket isnt something anyone wants to deal with. It acts like there is no fuel in the carburetor and needs to crank for several 4 tries before it starts. Pull the vacuum line off the FPR and check for presence of fuel.

If its there replace the FPR. The hard starting is probably going to end up being something becoming heat soaked. In the first datalog car has been sitting for 20 minutes and i start it.

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. When stopping for coffee or supplies fires right back up. Updated to edelbrock 2101 intake and 1405 carb.

Watch pressure to see how fast it drops off after key off. Posted June 6 2012. A few weeks later after a 30 minute drive 2 hours leaving the car off I went to start the car.

Pleasedodgevan2 August 7 2009 500am 10. At the beginning a worn FPR or fuel injector may give in to pressure in the fuel line and then stop leaking. Among serious problems like blowing smoke from the tailpipe and leading to the engine overheating a bad head gasket can also make it difficult to start your car.

Hard starting makes getting around difficult. My 2004 Mini non-S with 150000 miles starting doing something funny last week. I had originally ordered the fuel pressure regulator located under the intake manifold because the fuel pressure gauge needle was still rapidly.

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