Question about 2004 Volkswagen Golf

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Car not starting when engine is still hot . will start no probs when engine temp is cold first thing in morning but after a journey and engine is up to working temp it will not start till temp drops to about 70

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  • Anonymous Jul 22, 2008

    After driving a while - hot engine, if I stop and try to start the engine it either will not turn over or rumbles to a start?? No probs from cold

  • habgoodjohn May 11, 2010

    golf tdi 1.9 has truble starting when hot

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Could you give me more info plz

Posted on Jul 30, 2008

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2 Answers

Where do I start to look at when engine overheats when air conditioner is on


The A/C causes the engine to work harder (that's why fuel economy suffers when it is run).

If your car has an electric fan - make sure it runs when the engine is hot. If it does not - you may have trouble w/o the A/C running if is gets warmer outside. Look for fail fuses, disconnected plugs, etc.

You may also have flaky thermostat that is not opening fully when needed to exchange hot water in the engine block with cooler water in the radiator.

First, check the coolant level. You should find a semi-transparent reservoir / tank located under the hood that has a cap marked "Coolant". The side of the tank should have two indicator lines - one for HOT and one for COLD. If the engine has been run up to normal temperature (so that it can provide heat in the car), you should see the coolant level at or slightly above the HOT line. If the engine is cold - first thing in the morning or after sitting for several hours - the coolant should be at or slightly above the COLD line. View these levels while the engine is off and the car is parked on a flat, level surface. If there is not enough coolant - you will need to add the CORRECT type for your car.

Hot Engine
(1) With the engine hot, add enough coolant to the tank to bring the level to the HOT line. You may have to check the tank several times after driving if the coolant level in the radiator is down a great deal. NEVER open the radiator cap when the engine is warm or hot!

or:
Cold Engine
(2) With the engine cold, add enough coolant to the tank to bring the level to reach COLD line. Additionally - with the engine cold - you can add coolant directly to the radiator by removing the cap. Start the engine, set heat in car to HOT and add coolant mixture to radiator until level comes up to the bottom of the filler neck. Once the engine is HOT (getting heat in the car) check and top off radiator as needed and put cap back on radiator.

Check the levels in the TANK several times over the next few days when cold. If the tank ever empties -you'll need to have this looked at by a mechanic.

Apr 09, 2015 | 2009 Dodge Journey

1 Answer

Motor starts then dies several times when cold


Sounds like the cold start solenoid. It is designed to keep the engine running at a set RPM until it reaches a specific engine temp.

Nov 22, 2014 | 2003 GMC Sierra 1500

2 Answers

My car blows cold air then when it wants to blows hot xj6 1983 sovererign


That is because ur engine needs to warm up first more so in cold weather u need to slow the engine to warm up there is a therm stat in engine and wont open till its up to temp thats all the prob is so dont worry and give ur engin a chance to warm up first

Nov 06, 2013 | 1994 Jaguar XJ6

1 Answer

1989 mpv mazda does not start on cold mornings and days


I'm assuming the engine cranks with the starter but does not start and run.

check the operation of the cold start injector. This is a separate fuel injector that injects fuel into the intake manifold to help richen up the mixture for cold starts. It operates on a timer that is linked to a sensor that measures engine coolant temperature. Once warm or the timer runs out, the cold start injector is turned off. Other things to check:

Fuel pressure too high (floods engine through cold start injector), engine coolant temp sensor or intake air temp sensor is stuck at full hot (doesn't allow enough fuel for cold starts), fuel injectors are leaking (floods engine with fuel).

Feb 10, 2011 | 1989 Mazda MPV

1 Answer

Does the 2002 regal have a cold motor sensor Car hard to start when cold motor (in the morning )


Your vehicle uses the coolant temp sensor and the intake air temp sensor to determine the engines temperature on a cold start. If one of them is dramatically different than the other it will flag a code.

Is the check engine light on?

When was the last time you had a tune-up? if recently what brand of plugs where used?

Have you noticed any hard start issues after a hot soak? A hot soak would be driving the car until fully warmed up, shutting of the engine for approximately 15 to 20 minutes, and then starting the engine again.

Oct 27, 2010 | 2002 Buick Regal

1 Answer

My Spark 2004 800cc only start when engine is hot in the morning or at night when the engine is cold the car don't start but if the car start after several attemps you can smell petrol as if the car...


check the coolant temp. sensor for the Engine ECU as it might be faulty and gives wrong information about the engine temp. so if it feel the car is cold it'll ask the Engine ECU to give command to the fuel injectors to flow more fuel into the firing chamber and then it'll be fluded and won't start easily..

Jul 06, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Car not starting - Intermittent


intermitten problems are the worse, when it wont start check fuel pressure with a gauge, and then check for spark, i have spent days on problems such as this, what you have to find is what is missing, fuel ,spark, is maybe coolant leaking into one or more cyls, i have seen air in the fuel system that only cause problems when under hood temp is high, open the hood and it cools enough to to start, hope this helps

May 05, 2010 | Hyundai Motor 1998 Accent

1 Answer

Check engine light on


For the check engine light,you need to change the crankshaft sensor.For the temp ,to need to verify the the temp switch,if there is a short circuit in it,this will do like that.

Mar 05, 2010 | 1989 Honda Civic

1 Answer

Truck runs rough at start-up in the mornings


If this happens only when the engine is cold or cool, I would suspect a coolant temperature senor that has lost its calibration.
One way to check would be to have the engine controller scanned when the engine is cool then cold.
The coolant temperature should be the same as the intake air temperature. If the readings are not close to one another, change the coolant sensor.
The coolant temp sensor controls the fuel mixture when the engine is cold, normal or hot.
Good luck, let me know.
Regards,

Apr 07, 2009 | 2001 GMC Yukon Denali

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