My polo 3 won’t start when engine is warm or exposed to the sun for a long time
Hi..I have a polo 3 1.4 mpi. Actually, I have two problems. The first is that when I drive my car not necessarily for so long (the engine at its optimal point) and then I switch off the engine it won't start only after 3 or 5 minutes when it gets cooler.
The second problem is if I park the car outside exposed to the sunlight for a so long time. The car won't start only if inside the car or the engine (i don't know) cools down.
When I say it won't start, in both cases, it cranks as its about to start but it fails so.
Forgot if I park in a garage for a week the car st
The second problem is if I park the car outside exposed to the sunlight for a so long time. The car won't start only if inside the car or the engine (i don't know) cools down.
When I say it won't start, in both cases, it cranks as its about to start but it fails so.
Forgot if I park in a garage for a week the car st
Experienced mechanics share their insights in answering this question :
Hi there,
The problems you are having with your vehicle, may not be easy to diagnose. Apparently, under hood temperature and ambient temperature both create the no start condition. Components can act-up with temperature change. Assuming no check engine light is on. The no start condition will have to be duplicated and inspected at the time of no start. This will help identify what is wrong. So many things can keep the vehicle from starting. I recommend having the vehicles no start condition be inspected and diagnosed by a certified technician from YourMechanic.
The problems you are having with your vehicle, may not be easy to diagnose. Apparently, under hood temperature and ambient temperature both create the no start condition. Components can act-up with temperature change. Assuming no check engine light is on. The no start condition will have to be duplicated and inspected at the time of no start. This will help identify what is wrong. So many things can keep the vehicle from starting. I recommend having the vehicles no start condition be inspected and diagnosed by a certified technician from YourMechanic.
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
A car can have difficulty starting after being parked in the sun for too long. It could be a problem with the battery, the oil, or the coolant. Troubleshoot if a problem smells, sounds, looks, or feels strange. Call the mechanic once you have determined what the problem is.
If the car won`t turn over, that could be a failed battery, ignition switch, starter solenoid, or starter.
A difficult start could be due to a number of things, from a dying battery to a faulty starter. But if your vehicle has a hard time starting after sitting for just a few hours, it can cause an extra layer of confusion. When this happens, one of the most common causes is low fuel pressure.
One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.
A car battery works best at about 77 degrees Fahrenheit. When the outside air is in the triple digits, your battery may not be operating at its best. The fluid inside the battery can evaporate, causing a reduction in electrical output. If there`s not enough output, your car won`t start.
If this happens, try opening the hood of your car for faster cooling of the heat-soaked under hood area. Another possible cause of hard starting conditions in hot weather is an overburdened battery. A typical sign of this is a slow sounding starter motor.
If your vehicle won`t start, it`s usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter.
Hard start symptoms and starter failure may NOT be caused by the starter, but could actually be caused by the crankshaft position sensor. If your vehicle is experiencing one or more of these symptoms, the crankshaft sensor may be at fault.
Why won`t my car start but the battery is good? If your car won`t start but the battery is good, the most common cause is a faulty starter – though it could also be to do with your fuel. You may have insufficient fuel to get the car going.
Connected to the battery is the alternator, which works to generate power for your vehicle`s electrical components. When you have a brand-new battery but still can`t start the car, the alternator might be the issue. Cold and damp climates may increase wear on an alternator, causing it to fail.
The crankshaft position sensor monitors the position and speed of the crankshaft and other parameters that play an important role when starting the engine. If the crankshaft position sensor is having a problem, the vehicle may have intermittent starting issues or not start at all.
The O2 sensor will not cause the no start. The no start can be caused by the fuel pump or the ignition system. You should check the engine for spark and fuel pressure, when it is not turning on to help narrow the problem down. The ignition system may be the coil, module, or pick up in the distributor.
That problem may suggest you need to clean the throttle body, replace fuel filter, replace air filter, replace spark plugs or have fuel injector problems (I had mine cleaned and balanced and it helped my start-ups alot).
Dead Battery
This is the most common reason that a car won`t start, and it`s particularly common after a long, hot summer. Higher temperatures put increased strain on your battery, and a worn out battery can give out soon after the season ends.
A bad coolant sensor, a bad throttle position sensor (TPS), a bad fuel pump or a plugged fuel filter can all cause a lean condition causing long cranking times.
ProRacing Hot Start Fix is a device intended to help to start a warm and cold diesel engine. If you are interested in this device, you probably have the same problem as dozens of other users of diesel cars. TD, TDI, TDS engines and other, above 45 degrees do not start heater plugs.
A Bad Crankshaft Position Sensor
The crankshaft position sensor monitors the position and rotational speeds of the crankshaft. Without the crank sensor, the engine control module (ECM) wouldn`t know when to fire the fuel injectors and ignite the spark plugs.
A dead battery is the most common reason why engines fail to start up. A common reason for batteries to fail is drain. Your car`s battery typically expends a small portion of its storage to start your car up, and then recharges from your alternator as you move.
The Polo has been recalled once or twice in its time on Earth. One recall concerned the 1.2-litre engine, and was caused by loose camshaft adjuster bolt that could cause a broken pulley. Airbags that could suddenly go off unexpectedly, despite the vehicle not being involved in a crash caused another recall.
A Volkswagen Polo that has been well taken care of should last 200,000 miles – maybe more. Check that the car`s service record is up to date.
A manifold vacuum and/or barometric pressure, throttle position, engine RPM, coolant temperature, and vehicle speed sensor all modify the timing program.
Typically when your electrical accessories are working well, but it takes a few cranks for the engine to start, the issue is with the fuel or ignition system. In most cases, clogged or dirty fuel injectors, throttle body or mass air flow sensor will be the root source of this problem.
The reason for your car taking longer to start can depend on a variety of conditions including weather, battery health, starter health, fuel pump health, and other factors.
If you don`t hear clicking when you start the engine, the problem may be a dead battery. If you hear clicking, but the engine doesn`t crank, the starter might not be getting enough electricity. Using your owner`s manual and a voltmeter, you should be able to test functionality.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
My polo 3 won’t start when engine is warm or exposed to the sun for a long time
ANSWER : Hi there,
The problems you are having with your vehicle, may not be easy to diagnose. Apparently, under hood temperature and ambient temperature both create the no start condition. Components can act-up with temperature change. Assuming no check engine light is on. The no start condition will have to be duplicated and inspected at the time of no start. This will help identify what is wrong. So many things can keep the vehicle from starting. I recommend having the vehicles no start condition be inspected and diagnosed by a certified technician from YourMechanic.
The problems you are having with your vehicle, may not be easy to diagnose. Apparently, under hood temperature and ambient temperature both create the no start condition. Components can act-up with temperature change. Assuming no check engine light is on. The no start condition will have to be duplicated and inspected at the time of no start. This will help identify what is wrong. So many things can keep the vehicle from starting. I recommend having the vehicles no start condition be inspected and diagnosed by a certified technician from YourMechanic.
Car engine dies
ANSWER : The first thing I would do is have the turbo/intake system ’smoke’ tested or visually inspected for any leaks. Without a smoke machine, you could spray your engine and turbo system with brake cleaner and listen for idle changes to help determine if there is a leak. The brake cleaner method is not as effective as using a smoke machine.
Next, checking your fuel pressure is in order to see if you lose fuel pressure as it sits or if the fuel pump in the tank is weak. If the fuel pump in the tank is weak or losing pressure, it would cause the engine to crank as you mentioned. Performing a fuel pressure test is not easy and requires a special tool. If you want to have this looked at a technician from YourMechanic can come to your car’s location to diagnose your stalling issue.
The car is having trouble starting up ,70 percent of the time it starts right up. the other 30 percent, it randomly won’t start its
ANSWER : Hey there thanks for writing in about your 1998 Honda Accord. This could be a few things. A faulty ignition switch, a failing crank sensor, or possibly other faulty sensors could be the cause. To have this taken care of, consider having a certified technician, such as one from YourMechanic, come to your car’s location to diagnose and repair the hard start issue.
Every 3-4 months, my car won’t start. It does turn over though.
ANSWER : If your battery is weak or has bad connections to the battery, then you may have problems starting the vehicle intermittently. This is due to low voltage to the starter which is taking all the power, while the electronic ignition and the electric fuel pump get cut short. This will cause the vehicle not to start.
You may think the vehicle is turning over okay, but the starter is taking in all of the power just to turn over the motor. You should get the battery and it’s cables checked, as well as the charging system, for any problems by a qualified mechanic so they can diagnose the problem and do any repairs needed to prevent this problem in the future.
I have a 1994 Ford F150 XL 4×4 with a EFI 5.0 liter v8 it has a hard time starting when then engine is warm
ANSWER : Hello. You are most likely having problems with the fuel injectors clogged and there is carbon built up on the valves. Try using an injector and combustion cleaner to clean injectors and reduce carbon buildup on the valves. Have the truck checked and work done by a mechanic if you need help. The ignition should be replaced as needed like plugs, wires, cap and rotor. Injectors need to be professionally cleaned using a professional cleaner and not just some fluid put in the fuel tank.
Cranks over start than dies
ANSWER : Hi There,
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.
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.
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.
ANSWER : 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.
The car crank but won’t start
ANSWER : Hi there. This does sound like an issue with the wiring. If the check engine light is coming on every now and then this means that when it does not come on there is no power to the computer. This can be the wiring harness issue or an ignition switch problem. I would have to test for voltage to the computer when the problem is occurring to be able to find where the issue lies. If you need assistance, a certified YourMechanic technician can be dispatched to your location to inspect your vehicle’s non-start issue and suggest any necessary repairs.
