It wont start!

[Topgeartom]

My 172 did this a few days back and mysteriously cured itself after an hour.

The immobiliser light comes on solid, goes off, yet the car just wont start - it turns over nice and strong but wont fire.

So far ive swapped:

Coil pack, leads, crank sensor.

The fuel rail seems to be full of fuel, as taking off the return pipe at the left of the rail, produces a fair old bit of petrol.

After the car fixed itself previously, it drove without fault.

I'm stuck. Help.

Tom

 

[Topgeartom]

Had the RAC man out yesterday.

He determined that the ecu was detecting no rpm at all when turning over, hence not firing.

However ive tried 2 seperate brand new crank sensors and still nothing.

Any ideas?

 

[Aluco]

Kick it, hard.

 

[Chapster5]

Would a push start not help? See if that makes the ECU Detect the engine is turning?

 

[Topgeartom]

I have tried both of the above suggestions. No joy im afraid.

 

[Aluco]

f**k it then.

 

[Chapster5]

ECU Corrupt? Have it hooked up to a machine and check what error codes its throwing up. Im quite lucky my mechanic has one and he will check it for free. Ask your local mechnics