46 votes
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Car won't start, horn won't honk, headlights won't come on, what could cause this?

The symptoms all point to a faulty battery, and an incorrect test result for the Autozone battery test. Starting with this: Hitting brakes: Brake lights come on and interior lights dim: a good ...
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  • 4,412
34 votes

Is it ever neccesary to burn a starter out?

You could pretty much guarantee that he wouldn't treat his own car like this Starter motors are not designed for continuous use and will overheat due to the high currents involved and should be left ...
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  • 20.8k
24 votes

How slow ( not zero) can a car engine run without hurting engine and saving on fuel

You are right in the thinking of using less gas and that's exactly what the purpose was to have the start/stop feature. The main goal of doing it (at least here in the States) is for zero fuel ...
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23 votes

Ford Focus hard to start after fueling

The next time you plan to buy gas, open the gas cap, do not add gas, leave the gas cap open for the amount of time it normally takes to fill the tank, then replace the gas cap and start the car. Hard ...
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  • 1,173
20 votes
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How slow ( not zero) can a car engine run without hurting engine and saving on fuel

The oil problem You can run any engine speed you want as long as you keep the oil pressure up. Because of the impossibility of getting a roller bearing down a crankshaft, engine bearings are "...
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18 votes

Ford Focus hard to start after fueling

Modern cars all have what is called the evaporative emission control (EVAP) system. This is a system of valves, tubes, and a charcoal canister that is supposed to capture the excess vapors from the ...
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  • 9,429
16 votes
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Why does diesel engine need a warm-up before the start-up?

Since diesel engines rely on compression to run and not a spark like a gasoline engine, heat is directly involved in the combustion of the diesel in the combustion chamber. The way this occurs is that ...
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15 votes
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Can I jumpstart a non-hybrid car from a hybrid or full electric car?

There are two power systems on all electric cars (fully electric and hybrids alike). This is in conjunction with the much higher voltage battery packs which normally power the electric motors. The ...
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15 votes

Car won't start, horn won't honk, headlights won't come on, what could cause this?

All symptoms point to a dead battery, but as you have already attempted to rule that out, the next thing I'd check would be bad connections or cables. Turn on the headlights or something else that ...
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14 votes
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Why the different the colors of terminal corrosion on the battery?

tl dr: Corrosion (once cleaned) is not a huge issue. It is just typical corrosion on the battery terminal. See this image: (NOTE: This is a 6V battery, but the same principles apply.) The blueish ...
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13 votes

What does it mean when I turn the car key, nothing happens for a bit, and then the car revs to life?

The most likely from my experience of this happening are - Worn/burnt contacts in the starter solenoid Worn starter motor brushes Bad connection between the high current cable and the starter ...
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12 votes
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How to start my motorcycle when the kick-starter fails?

Turn the key in the ignition to 'On' Hold the clutch lever Engage first or second gear Let the motorcycle gain speed (either go downhill or push start) Let go of the clutch lever. The motorcycle ...
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  • 39k
11 votes
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2000 VW Polo struggles to/won't start when engine warm

This sounds like a problem with the coolant temperature sensor. Don't worry - replacement is cheap and can be done easily by yourself or a friend who worked on cars before. Cause Cold engines need ...
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  • 1,281
11 votes
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How to setup the car so that while driving I do not have mist glass?

In the two pictures/icons you provide the arrow is intended to indicate the flow of air with regards to the cabin. Where the arrow is coming in from outside the car allows air from outside the vehicle ...
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  • 9,773
11 votes

Motorcycle's electrical system and starter work after sitting for years, but engine won't run

Stupid thing but easy to forget, make sure you have the fuel stopcock on, and that the fuel hasn't evaporated completely. I had a very similar situation with my first bike, a 77 CB500T that had sat ...
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  • 14.6k
10 votes

Can I jumpstart a non-hybrid car from a hybrid or full electric car?

The other answers failed to emphasize an important point: the 12V battery on hybrid cars is not designed to start an engine, being much smaller than typical automotive starter batteries. Thus, it may ...
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  • 13.6k
10 votes

2003 Honda Accord - Intermittent no start/no crank

From personal experience, I'd replaced ALOT of these working at the dealership. It wasn't just the accords either, it was quite a few Honda and Acuras that used the same design and power delivery ...
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  • 3,333
9 votes
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Saab 9-5 has problems starting

I've a 93 and have had what sounds like the same problem, that is the ignition turns on but when the key is turned further to start the engine it does not always crank the engine. In my case it was ...
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9 votes

Corrosion on battery, won't start, making clicking noise, won't charge

Repeated clicking is a result of not enough power making it to the starter. Your battery either has a bad connection, or is too weak to turn the starter motor. Battery Connection Your problem may be ...
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9 votes
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Crank vs turn over vs start vs whatever

I'd say the following, which seem fairly universal: Nothing - the worst option, you turn the key and nothing happens at all - either the battery is flat, the immobiliser is misbehaving, or the ...
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  • 28.6k
9 votes

What does it mean when I turn the car key, nothing happens for a bit, and then the car revs to life?

What you are describing is known as a 'lazy' starter. Starters take a lot of power to run, enough energy to injure a human, so to protect the carbon unit between the pedal and the wheel automakers use ...
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  • 14.6k
8 votes

Can I jumpstart a non-hybrid car from a hybrid or full electric car?

Lots of good answers, but will clarify something for what it is worth: All hybrid cars do have a 12V and a high voltage system. In my Prius (2009, 2003-2009 model), the 12v battery is in the boot. ...
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  • 81
8 votes
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Does starting and stopping the engine lots over a short period of time in a non start-stop car damage anything?

Something to keep in mind is that the time an engine takes a great deal of its wear is cold starts. The oil isn't up to temperature yet, so parts are not separated as they should be and you get more ...
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  • 9,286
8 votes
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How can I move my push-to-start car with the starter?

I've got the same sort of function on my Seat Leon (and on my old BMW 320D) - if you drop the clutch quickly enough it will move the car a little. Although I doubt that's enough to get you clear of a ...
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  • 2,645
8 votes

How to setup the car so that while driving I do not have mist glass?

First, you need to know what each does. #1 allows Fresh air from outside the vehicle. #2 is Recirculates air already inside the vehicle. Unless you are running the AC, you should have the selector to ...
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  • 9,035
8 votes

How slow ( not zero) can a car engine run without hurting engine and saving on fuel

The engine needs a minimum rpm to idle smoothly - a v8 can idle smoothly about 500to 600rpm but a 1 litre 3 cylinder needs around 700 to 900rpm... It is not the companies that really decided to do ...
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  • 34.4k
7 votes
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Trying to start a Honda CBR250RR after winter (Also feeling a lot of friction when in neutral)

This shall be a lesson to you about winterizing your bike. Let's take it from the top. Drain that nasty ancient gas out of the tank AND out of the carburetor bowl(s). You want it completely gone, all ...
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  • 2,534
7 votes

The poor man's Start Interrupt Switch -- non-obvious way to disable starting

The other day while I was searching for information on electronic relays, I ran across this solution to your problem: (I found it on this site.) Here is the write up which goes along with it, which I ...
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7 votes

The poor man's Start Interrupt Switch -- non-obvious way to disable starting

If you really want a no-install option, and even @paulster2 answer seems like work then why not use old school locks like gear/steering locks? Or better, this -
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  • 2,186
7 votes

Renault Modus wont start

While your question is pretty thorough, I'm assuming a few things in this answer that you didn't clarify; When you crank the engine, and it doesn't start, I'm assuming it's a smooth crank without ...
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