Ecu Replacement... Car Still Will Not Start

[zena ellie]

fitted second hand ecu . bsi. Egnition barrel . transponder and key. But still cannot get car to start any help welcome

 

Fitted to citroen c4 vtr plus 2lt petrol all parts are also from same model

[paul.h]

This is proving difficult for you to sort out, are you still getting the anti theft message ?

 

When you did your first checks did you try replacing the crankshaft position sensor - these do not always give a fault code if they fail and initially they fail when hot, stopping the engine, but allow the car to run again once cooled down, before eventually failing completely ? There will also be a camshaft sensor but if this failed it probably will give a fault code, when one failed on our C3 it gave a code but the car also still ran although in limp mode.

 

The following are links to your other posts about this problem so we can keep everything together. I have also locked them so nobody adds to them and put links on them to this topic so all replies will stay with this topic.

http://www.citroen-owners-club.co.uk/citroen/topic/21765-ecu-replacement/

 

http://www.citroen-owners-club.co.uk/citroen/topic/21823-alarm-ecu/

 

http://www.citroen-owners-club.co.uk/citroen/topic/21837-wanted/

 

From these:

 

A scanner was used to unlock your car, then it began cutting out when driving and then it would not start.

An auto electrician diagnosed a faulty ecu and the need to replace it, the bsi, the ignition barrel and keys (so the immobiliser chip matched the replacement ecu).

Some time after the auto electrician finished, the car then started giving an anti theft message.

You have fitted a new car battery.

The engine turns over on the starter motor.

There are no sparks at the spark plugs.

The petrol fuel pump works and delivers fuel if a separate 12 volt supply is provided, otherwise it does not run.

The car initially would run using easy start but then it would not do this when the anti theft message started to appear.

You have replaced the alarm transponder at the ignition switch but this made no difference.

[paul.h]

Have you managed to make any progress on fixing your car ? I had hoped summarizing your posts would bring some more replies from other members with things you could check.