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54 votes

Is revving the engine to redline on idle at morning bad?

If your engine even has a problem carboning up, you don't clear it at cold start. Nor do you clear it by spinning the engine to redline. "Revving" isn't meaningful to diesel engine performance the ...
Harper - Reinstate Monica's user avatar
47 votes
Accepted

Is revving the engine to redline on idle at morning bad?

Yes, this may be bad. The oil is not yet at the operating temperature, and the same is true for engine parts as well. I wouldn't redline a cold engine with cold oil. Your intention to clear carbon ...
juhist's user avatar
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12 votes
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Is it true that most of the engine wear during its life time occurs during a cold start up?

From advanced-auto-maintenance.com: It’s widely acknowledged by automotive engineers that most engine wear occurs within this first ten minutes of driving before the engine has reached its highest, ...
anonymous2's user avatar
  • 5,235
11 votes
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How would a camshaft start moving during a cold start?

Crank shaft has a pulley or a sprocket at the front end, which turns a cam shaft/shafts through a cam chain or cam belt (timing belt). 1 turn of a cam shaft = 2 turns of a crank shaft. At the other ...
Arturs Bolsunovskis's user avatar
10 votes

Is it true that most of the engine wear during its life time occurs during a cold start up?

When your engine is cold, the gasoline is less likely to evaporate and create the correct ratio of air and vaporized fuel for combustion. Engines with electronic fuel injection have sensors that ...
MooseLucifer's user avatar
  • 6,007
7 votes
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What happens when you start a car?

To supplement kyle's answer I'll include this excellent animation, since a picture's worth a thousand keystrokes. The section on Electrics and how the animation showing how the timing belt connects ...
Zaid's user avatar
  • 39.2k
6 votes

Is it possible to have glow plugs on all the time for certain amount of time?

The way the VW (so assuming Audi is similar) glow plugs are controlled on the TDI Jettas of similar vintage, the plugs should come on (what VW calls "pre-glow") whenever the block is cold. You should ...
dlu's user avatar
  • 14.5k
6 votes

Startup problems: low idle RPM and stall on pressing the accelerator

Not familiar with your vehicle/engine specifically, but familiar with carbed engines in general. I would think the #1 thing to look at would be the choke. Pumping before starting a carb vehicle is ...
rpmerf's user avatar
  • 8,403
5 votes

1989 s10 Blazer Cold Start issues

Take your car to a local parts store and have them check the battery. Old batteries lose cold cranking amps and it may just not be getting enough amperage to turn the engine and start the car. Often a ...
rviertel's user avatar
  • 1,169
5 votes

Sufficient Oil Distribution after Cranking for a Long Time?

The ideal method requires a moderate level of mechanical skills. There is a tool available (small block Chevy oil pump primer) that turns the oil pump with out cranking the motor over. The distributor ...
mikes's user avatar
  • 20k
4 votes
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Is this diagnostic correct?

It may be the starter but you'd want to check for battery voltage at the B terminal on the starter and check that the circuit on the S terminal is OK first. When checking the S terminal have someone ...
Ben's user avatar
  • 10.7k
4 votes
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Starting my Honda Accord in Michigan winter?

The only requirement for the engine after start before power is applied is that enough oil is flowing to the camshaft, bearings and cylinder walls and piston rings. The cam and bearings are fairly ...
Fred Wilson's user avatar
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4 votes
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What is causing my diesel car to struggle to start in cold (below 0°C) temperatures?

-10°C should be no big deal for any car to start in, including diesels. Many diesel cars have glow plugs that are activated during cold weather before start (yellow spiral symbol light on dashboard). ...
MadMarky's user avatar
  • 1,350
4 votes
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Car Battery Loses Connection During Cold Weather

Sounds like your battery terminal connectors are stretched to the point that they are loose even when the bolt is fully tightened. Best fix would be to replace them with new connectors. ...
HandyHowie's user avatar
  • 25.4k
4 votes
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If I start a previously unfueled small engine, do I keep choke on for first pull only or until it starts?

I think you're overthinking it a bit. Just follow the directions. As far as fuel in the float bowl, if the fuel tank is above the carb (which I believe is the case ... especially if it doesn't have a ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes

Timing sounds off, how do I confirm this?

When changing the timing belt, it is the valve timing that can become displaced if the belt is not put back in the correct position. To accurately check this is a simple visual check. However, to do ...
HandyHowie's user avatar
  • 25.4k
4 votes

4Runner jolting when the engine is cold

Rough idle when cold is usually a temperature or air flow sensor issue. The absence of codes doesn't mean your sensors are working properly, there may be electrical continuity but false readings. ...
GdD's user avatar
  • 17.1k
3 votes
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Hero passion pro India Bike is only get started on choke

Turn the choke ON to start a cold engine. Once it is running, set it to PARTIAL until the engine is warm. Once the engine has been running a few minutes, set the choke to OFF. Choke helps the engine ...
rpmerf's user avatar
  • 8,403
3 votes

Cranks, but slow to catch. Dies after starting

I am assuming no check engine light? Strange to have this mix of issues and not throwing diag codes - you'd get a misfire code for instance if you had a weak coil pack. Based on this intermittent ...
Neil's user avatar
  • 51
3 votes

Very difficult cold starting

The white smoke sounds like antifreeze burning. I would suspect the cylinder head gasket. After cranking five times you have emptied the cylinder(s) of antifreeze and then the engine can operate ...
Old_Fossil's user avatar
  • 3,962
2 votes

What happens when you start a car?

This is a pretty neat video showing all the working of the engine itself. To give the simple, broad, answer to your question, the starter forces the crankshaft (the shaft at the bottom of the block ...
kyle_engineer's user avatar
2 votes

Is this diagnostic correct?

Sounds like starter gear windingout and then overheating, I would replace the starter. These sound like typical symptoms...
Frank P.'s user avatar
2 votes

Startup problems: low idle RPM and stall on pressing the accelerator

initially press the accelerator slowly to the floor. Then wait a few seconds before cranking. Pressing the accelerator slowly uncocks the auto choke without injecting fuel via the accelerator pump ...
Hutch's user avatar
  • 61
2 votes

Preventative maintenance to avoid winter start difficulties?

-10 °C for a petrol engine should be a piece of cake, I used to drive my 1986 Audi at temperatures below -25 °C. The only time it wouldn't start is when the battery was on it's way out, so obviously ...
I have no idea what I'm doing's user avatar
2 votes
Accepted

Cranks, but slow to catch. Dies after starting

These are symptoms of a failing fuel pump. After Neil's answer, I filled with premium and the problem seemed to go away for a few days. Soon after it was back with a vengeance and about a week after ...
Dan A.'s user avatar
  • 494
2 votes

Cranks, but slow to catch. Dies after starting

It sounds to me like you have a sticky injector or four. Once it warms a bit (which happens very quickly on the injectors) it will respond properly and start spraying when asked. Difficult to test ...
enderw88's user avatar
  • 306
2 votes

Honda dirt bike with clone engine lots of problems

Your bike is full of deposits -- carbon and varnish -- that are byproducts of petrochemical fuel and years of combustion. Deposits clog fuel lines and carburetor jets, cause piston rings to stick, ...
Carguy's user avatar
  • 1,992
2 votes
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Is it bad alternator or starter? Camry ‘05 173k miles..

That video was very helpful. You have either a low battery, a bad connection to the battery, or a bad connection to the starter. Since jumping from another vehicle (the other vehicle was running, ...
JPhi1618's user avatar
  • 13.2k
2 votes

What is causing my diesel car to struggle to start in cold (below 0°C) temperatures?

The extended cranking is hard on the starting system, but should not hurt the engine. From the information you have provided, including comments, it sounds like the glow plugs need to be replaced. ...
CharlieRB's user avatar
  • 9,015
2 votes
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Engine pre-startup automatic lubrication to prevent wear

The main reason oil does not circulate very well at startup is because the oil is at a low temperature. It takes a minimal amount of time for the oil to reach pressure when the engine first starts ...
Steve Matthews's user avatar

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