Car Struggling To Start When Hot

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I hope this helps but do please feel free to ask any further details by replying to this thread. Remember that when your engine is hot it's a bit harder to start as the compression is.


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Car struggling to start when hot. It happens because batteries produce less current at low temperatures, which results in less power to the engine. If that is the case you can try replacing the wires or cleaning the connections. If there’s nothing wrong with your coolant levels, your motor oil, or your battery, and your car still won’t start in hot weather, it could indicate a deeper issue with your engine.

This happens when its hot or cold. If it swings on the turn when its cold then you dont have a spark or fueling problem. This can be a cause of the hard starting when warm.

When your car engine is too hot, fuel cannot circulate well, due to the way vapour obstructs it workings and therefore the engine just will not start, as it should. Your coolant temperature sensor might be broken, for instance, which means that the engine will “think” it’s hotter than it is. Okay i've got a 2000 gu patrol(i know:rolleyes:) with starting dramas.

If you battery is more than a couple of years old, it's probably not helping anyway. 1) what to do when a hot engine is hard to start? This happens if the engine is extremely hot.

Why won't my old diesel car start when the engine is hot? Fuel cannot circulate well due to the way in which vapor blocks it. Here are some reasons why you face trouble starting the car after letting it sit overnight.

Starting problems when hot/cold are usually the engine temp sensor which is also in the back of the head. I have a vn v8 that's a bitch to start when hot. And the gap on the spark plug doesnt change.

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The engine turns over but just will not fire up for around 30 to 60 seconds. The easiest way to check this is to try boosting your battery with another known good one, ie. Vehicle starts up as normal when cold but if the engine is then switched off the vehicle takes ages to restart.

It can also be down to the engine heating up the injectors. Anything that uses electricity uses your battery and will drain it. If neither are the issue then hope for help from the real fundis on the forum.

Sometimes this issue makes your car hard to start but runs fine once it gets going. Slow to crank over but it eventually fires most of the time. As a result, the engine would not start as easily as it should.

Remember that when your engine is hot it's a bit harder to start as the compression is higher than when cold and the starter motor is also hot. Although your car might not start for a number of reasons, there is a routine you can go through to give you the best chance of getting things up and running. Your engine may be suffering from low compression;

And you shouldnt have a problem with heat if your starter is in the back, cos all its exposed to there is just warm air not like when the starter is right next to the branch. In worse cases, it would not start at all. If it starts ok, your battery is going.

When the auto is warm locate the blue coolant temperature sensor, remove the cable connected to it, think it needs a squeeze, and connect the probes of the multi meter to each pin Hence, the car won’t start. Fuel economy appears to have gone down, i am struggling to get 50mpg at the moment (usually average 58ish on the work run).

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You might notice that a car won’t start when it’s cold but starts when it’s warm. Sometimes its starts fine but other times its really bad. Try dropping cold water on the starter when hot to see if it starts easier, otherwise try running a single jumping lead from the + battery to the corresponding terminal on the starter.

There is a 3rd lesser reason, and this relates to the condition of your ignition coils (although this will manifest itself slightly differently to the classic hot start problem). You can find out more information on this subject online at autopages.com.au who suggest to keep your engine running at the correct temperature and to protect its alloys and metals, you need to use a properly. This includes headlights and radios.

Engine struggles to start up when warm. A hot starting problem can often be due to a sensor problem and something worth considering if the frp does not fix the issue. You have said the engine overheated at one point.

Most of the causes are fuel related problems. If batteries and engine oil don’t like cold, then keeping them warm is the most straightforward, if not always the most practical, approach. If either of those wires are making a poor connection or have become broken or corroded they could be giving a weak signal or insufficient power for your car to start.

Wondering if just replacing the battery is going to fix it or if i should be looking for something else (battery is a few years old) never touched the starter in the whole time i've had the car. It doesn't stop it from starting altogether, but it can cause difficulty in some cases. Difficulty in starting a car engine.

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Your engine may have a slow starter motor;


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