Motor unit

[pauseklovn]

Hello

AYGO 1 L (2010)

Can I change the ecu engine control unit myself?

cylinder 2 fault from unit

(Ignition coil, spark plugs,  are brand new and okay. Compression okay. Wiring original )

 

[gotagetz]

Don't think it's as easy as just swapping it. It would have t he programmed to the car I think due to the immobiliser.  

What's the problem?  How do you know it's the ECU?

[pauseklovn]

Hello again

First mechanic told the engine itself is ok. They spent 4 hours (6½ hours, but they gave discount down to the 4 hours I paid) and changed spark plugs, ignition coil without being sure of faults. Errors are periodic. The mechanic would then change the ECU (find a used one that needed to be reprogrammed) but they were not 100% sure it would help and then they would change the wiring harness. But when the Mechanic was so insecure and not sure what could help, I stopped their work and picked up the car. Now I examine everything so I can hand in the Aygo to another workshop (Bosch shop)

 

[flash22]

Bad fuel injector ? swap the injectors 2 and 3, see if the fault moves

[pauseklovn]

Flash22

After I got the car home I drove 14½ mil of which 1 - 2 mil Aygo drove normally. Do not think it is injection nozzles.

However, have read about a spring that will not return in the injection. But mechanical failure should occur 100% of the time ........ Or?

[pauseklovn]

On 12/21/2020 at 3:29 PM, pauseklovn said:

Flash22

swap the injectors 2 and 1,  and now no problems...........But the mechanic has asked me to pick up the car and drive around in it, to see if the periodic fault comes again

 

[flash22]

He may have knocked some dirt loose or the injector o-ring was letting in air by moving it, it has reseated it

electrical problems can be very intermittent

IIRC the input side of an injector has a very fine filter