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It is turning over fine but not starting
Car: Ford, Focus, 2003, 1.4 pet - Back to Fix-It - Ford Repair Manuals
Q.Hellow there. I was woundering if you could give me a list of checks i could do? I have a 2003 ford focus 1.4 petrol.
It is turning over fine but not starting! Its throwing up fault codes P0351.P0352.P0460.
Now there is 12 volts coming in to one wire on the distributor i dont know how to test the rest or where to go from here! I need a answer as soon as you can please.
Answer P0351 and P0352 are ignition coil related faults but P0460 is a fuel level sensor fault.
Therefore I would put in 10 litres of fuel to see if that makes a difference. It could be that you are out of fuel although your guage shows different.
Addition There is petrol in the tank for sure. And the pump is pumping it.
I have tryied a new coil pack and it made no difference.
There are 3 wires coming in to the coil pack and there is 12 volts coming to one.
What are the other 2 wires for so i can check them?
Answer Pin 2 green/blue is 12v ignition.
Pin 1 black/orange is from ecu switched earth for one coil
Pin 3 black/green is from ecu switched earth for other coil.
P0460 is still some sort of fuel problem which needs to be checked.
Addition I tested a car the same as the one in question to day which is going fine.
I disconnected the coil wire tested the 3 wires when the key was on the start position.
Middle wire had 12 volts.
The other 2 wires had no live nor were the grounded from the ecu!
Why were saying they should be a switched earth,
What are you on about?
Answer For a coil to work it needs a 12v supply. The earth is supplied by the ecu when it is required. This is the switched earth. You can only really see it with an oscilliscope because it happens so quick.
If there is no switched earth then the coil voltage cannot collapse and induce the high voltage into the secondary windings and cause a spark.
Addition I have tested the wires coming from the coil to the ecu there is nothing wrong with the wiring harness.
Could the crankshaft sensor not be sending a signal to the ecu to engauge the coils???
Bill can you tell me what to check and where to go from here?
Answer It is possible the crank sensor would cause part of this problem.
They can get contaminated with rust which then sticks to the magnet.
Remove the sensor and clean the face. You can also check its internal resistance. It should be around 800 ohms.
Also check the fuel relay cut off switch has not activated by mistake. Your handbook should show you where it is.
Addition I have tryied the crankshaft sensor no luck.
Thanks anyhow for your help.
More Info required What about fuel cut off?
Was that ok.
Addition I finally sorted the problem just said i would let you know the cause of the problem so it would be of use to you when you will come across the problem again.
It turned out to be the ecu in the finish.
Thanks for your time.
Answer That would have been a switched earth fault then.
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