Mechanics

INSIGNIA HOT ENGINE START PROBLEMS

2009 Opel Other • 51,000 miles

Hello,

I have a problem when starting my Opel Insignia when the engine is hot. The engine will not start unless you wait for at least 30 min. After that when it starts it works fine. It feels like the fuel doesn't get pushed forward.

The problem occurs only when the engine is hot (ex: city drive). At service they couldn; t find any errors and of course, the problem could not be reproduced at the service station.

Any ideas?
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Andreidutz
August 21, 2012.



All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.

Wrenchtech
Aug 21, 2012.
One of the most common causes of non-starting when hot would be the Engine Coolant Temperature sensor. Though it may not produce any codes, it can cause flooding or insufficient fuel being injected into the engine. Have it tested.

KHLow2008
Aug 21, 2012.
Hello,

Thanks for the advices. Today it just happened again and so i filmed it. here you can see the video: http://www.youtube.com/watch?v=bQifuC1ikkc&feature=youtu.be
I hope this will help you.

Today was a very hot day and i had to do a lot of short runs to do( 1-5 km). After a few stops the car would not start. After a few trials i let her cool down for about 1 H and it started without any problems.

I'm going to have it tested again this week, but the problem is it never happens when i'm at the service.

Tiny
Andreidutz
Aug 22, 2012.
So, you have a "no crank" problem, not a "crank, no start".

You will have to test for power arriving at the small trigger wire of the starter when the key is held in "start" position. You can't test it unless the problem is present.

Wrenchtech
Aug 22, 2012.
Actually I think I forgot to mention something: At the first key the engine starts for 1 2 3 secound then the turation of the motor slowly goes down to 0 RPM.

The video has taken at the second attempt to start engine and it doesn; t start at all.

Tiny
Andreidutz
Aug 22, 2012.
I have a Vauxhall Insignia 160diesel which has exactly the same problem. Nobody seems to be able to tell me why. I drive along, stall the engine and try to restart but it will not start and leaves me stranded in the middle of a junction. Another time I pulled into a carpark and turned off the engine for just ten minutes, it refused to re-start. Eventually it starts but it is embarrassing. If you find the problem/solution I would be grateful to know

Tiny
Abo
May 6, 2013.
Diesel and petrol driven engines are different and same symptoms could be due to different causes.

KHLow2008
May 7, 2013.
That's very true in many cases but the cause just might be the same so on the off chance im willing to hear if the cause has been found.(Plus the guy doesn't actually say if his is petrol or diesel) luckily I have enough knowledge to know that a petrol and a diesel engine are different. But as no 'expert' has yet been able to provide an answer to my nor apparently the original problem in this thread, we are forced to find solutions where we can. As this guy is experiencing exactly the same problem as me and no-one has a solution I have no other choice but to hope that one of us finds the solution ourself

Tiny
Abo
May 7, 2013.
Waiting is not going to get you any answers and if any, it might not apply.

When engine fails to start, you need to check if the injectors are firing. A faulty fuel cut solenoid fault can result in no fuel getting past the fuel punmp to the injectors.

Did you check for trouble codes?

KHLow2008
May 8, 2013.
Thanks.I connected an OBD reader to socket under dash. There are no error codes and no faults found.

Tiny
Abo
May 15, 2013.
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