Question about 1995 Volkswagen Passat

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Engine not starting in hot weather ONLY!

If the car sits in the sun, a few hours, the engine will cranck but will not start. This never happens in a cool day or in the morning for example.

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  • George Lee Jan 29, 2009

    Thanks for your help vagman54. Unfortunately I replaced the sender regardless a few weeks ago but the problem is still there.

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I had the same issue, if the coolant temp switch is good, replace the ignition coil, that's what it was for me.

Posted on Jun 09, 2009

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Check the coolant temp sender unit,disconnect it and then see if it starts,if it does you need a new one

Posted on Jan 29, 2009

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Volkswagen Polo hot start problem


1) see the diagram
2) use the scanner and computer test, this will guide a exactly problem
3) reset the igntion timing, it doesnot matter if your system ha BCM, adjust to accoridng the specification manaufacturer, because the BCM runt according to the information recorderd. remember the BCM =CPU.
4) test the sensor cam/crank with VOM see the diagram.
5) the head gasket i blown, valve timing is incorrectly set. the exhaust system is blocked.
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Jul 18, 2012 | Cars & Trucks

1 Answer

I have a Nissan Maxima QX 1996 model. Only in the morning (but the weather is already hot!) at the first time I tried the engine is not starting... Battery and starter motor is working for minutes and...


You migh have an Injector leak down problem, the fuel rail goes empty and while you keep cranking the fuel rail fills up building pressure and then the engine starts, this normally happens if the vehicle is parked for more then 3-4 hours.

Aug 11, 2011 | 1996 Nissan Maxima

1 Answer

My 88 will crank but at times will not start. if left to sit for a while will start then runs great. the fuel pressure is good any ideas


It happens to my 93 Integra but mostly when the car is sitting in the sun or when the weather is hot. What works sometimes, is to step on the gas pedal down to the floor and start the car at the same time. Other times, I wait a few minutes and then do the same thing.

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1 Answer

Maxima does not start easily after sitting in hot sun for a while


Hot and cold? Hmmmmmmmm, interesting,You may want to to have the air temperature sensor replaced. Its a small sensor on the intake duct coming of the air cleaner. You can change it yourself if needed. Good Luck

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Misfire, 2002 3.4 l, V-6, Grand Am, only after sitting out in sun


i would check wiring at injector 6 for a bad contact if ok test injector

Jun 22, 2009 | 2002 Pontiac Grand Am

2 Answers

Car sometimes takes a long time to start


when a car's engine is heat-soaked from driving it can be harder to start. your spark plugs probably need to be replaced or at least re-gapped. when spark plugs age the gap gets larger and this can make the engine harder to start under these circumstances.

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1 Answer

1999 Escalade won't start after sitting in rain


What engine? 5.7? If yes, replace the distributor cap.

Apr 06, 2009 | 1999 Cadillac Escalade

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1991 Plymouth Acclaim stalls


One of the more common problems with the 2.5L & 2.2L engines that suffered the symptoms your describing, such as, starts & runs good, then at any given time would just quit, not start, but after sitting a while, or by the time the mechanic gets to it, it starts right up, or you sit on the side of the road for 20 min. or half hour then away it goes for a while longer, then quits again down the road. There is a pick-up plate under the distributor cap & rotor, with the wiring plug coming from it. 90% of the time, it's defective, and cuts out especially, but not limited to, more often when weather is hot.

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1 Answer

Won't start in cold weather


possibly you battery is no good go and get it checked some time batterys say there good but once you but some stress on it ,usllaly it fails right in front of ya ,, or maybe tis the truck has a bad ground by the starter you might want to check that too let me know what happens

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1 Answer

Will not start on hot day's in the sun.[engine cranks normal]


The normal reason why a hot engine doesn't start is the choke. Your fancy new range rover will have a computer controlled choke that will be activiated by a temperature sensor. maybe this has failed or is disconnected
In my ancient range rover I have a manual choke but essentially the same engine. I know that if the motor is hot I can't start it with the choke on.
The way the choke works is it restricts the airflow into the engine so that there is a richer fuel / air mixture which is needed for a cold start. If the engine is hot and the choke comes on the engiine floods with petrol and there isn't enough oxygen for it too ignite in the cylinders. To start a flooded engine you have to open the choke and crank the motor without pressing the accelerator. This pumps out the petrol vapour and eventually it will fire and start. If the computer thinks it is cold because of a disconnected or faulty sensor it will put on the choke whenever you try and start and the engine will flood.
I think a vapour lock is unlikely unless you driving in extremely hot weather (above 40 degrees celsius).

Oct 08, 2008 | 2008 Land Rover Range Rover

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