Hi i had a fault with my ecu. I have replaced it and now there is no fault! but my car wont start, ive replaced the ignition barrel and key and had the key coded, still wont start the immobiliser light is flashing ive removed the black box from under steering collum and also the little black box from behind the fuse box the immobiliser light has gone out but still wont start theres no fuel geeting to the carb although there is fuel in the car. What do i do now?

Just a guess but based on experience with other manufacturers I would think the ecu is uniquely coded to the security unit and engine.
Pulling the Black box will probably only work if the ecu is already coded to the engine and the security system is off and the engine running.

You need to either get your ecu decoded off the car by a specialist or you original ecu repaired.

Hi thanks for the info. Ive been told by a mechanic that there is a faulty wire somewhere as he had it started, he took the battery off to charge it and now it wont start again.

When you say that it isn't starting is the engine turning over but not firing or will it not even attempt to start ?

We'll need as much information as you can give us to help

Yeah its turning over just not firing up

On a saxo/106 the imobiliser is a seperate unit under the dash, if you have connected the ECu before you removed it you will have locked the ECU to that imobiliser and if you have also changed the key/transponder it will now be locked and unable to run, cant remember if it cuts the fuel or the spark but the only way to fix it unless you have all the original gubbins is to get an unlocked ecu and make sure you deffo have the imobiliser unplugged before you connect it or it will lock again and you will be stuck again

Hope it helps

Sheep

just a quick thought have to tried to reset the engine cut off switch red button under the bonnet causes similar symptoms and is dead easy to fix jsut press it

Look for the BSI reset procedure, it might be your problem. BBA reman do repairs to BSI units and are well spoken of.

i had the bloody thing running earlier for about 2 seconds haha i filled the carb with petrol and it turned ova n started then summat kikd in and it cut out then wouldnt even turn ova afta that

souds like the fuel cut off if you had it running with fuel in carb


rememeber you combustion triangle




Oxygen + Fuel + Spark


so you have all three it runs - remove fuel it stops!

how do i bypass the fuel cut off?