This is my first BX and first petrol car so all advises are welcome

Unfortunately the problem came back. I did some testing yesterday and cleaned some connections and grounding point for ignition module. Biggest suspect is ignition module because I have heard those tend to break sooner or later. Ignition coil and coils lead are possibilities too.
Jaba wrote: ↑Fri Nov 16, 2018 6:39 pmI seem to remember that when I had similar erratic symptoms 20 plus years ago I was able to check the flow meter's output, with engine not running, while moving the flap slowly and measuring the output voltage. I think I used both an oscilloscope as well as a voltage meter.
Does the rev counter drop to zero during the malfunction indicating a loss of ignition pulses ?
There is a way of reading the ECU fault codes. It is clunky and often inconclusive and involves looking at the error light flashing sequence.
Then when you have exhausted checking the ignition side what about fuel filter, dirty fuel, fuel pressure.
Maybe I need to dig deeper to that. Even though this problem occurs while I accelerate. Maybe throttle position switch could cause this after all. I have not been able to get bosch diagnostic tool. where can I find some article about reading the fault codes via engine fault light?Jaba wrote: ↑Fri Nov 16, 2018 8:15 pmI am not sure of the mechanism used but with this ECU system, when working normally, while slowing down with the throttle closed the fuel is cut off and maybe ignition too until the revs reach about 1500 when it starts burning fuel again. I used to be aware of this because I felt a very slight surge at 1500 revs which made me realise that this was what was happening.
Have you been able to get hold of the Bosch diagnostics for your jetronic system ?
Janus wrote: ↑Sat Nov 17, 2018 11:33 amMaybe I need to dig deeper to that. Even though this problem occurs while I accelerate. Maybe throttle position switch could cause this after all. I have not been able to get bosch diagnostic tool. where can I find some article about reading the fault codes via engine fault light?
Thankls for the link. The problem have vanished again tough. I had ordered the TDC sensor before that so I might as well change it when it arrives. If this problem occurs again I have to shake wires in engine bay. It might be bad connection somewhere.Jaba wrote: ↑Thu Nov 22, 2018 12:44 pmJanus wrote: ↑Sat Nov 17, 2018 11:33 amMaybe I need to dig deeper to that. Even though this problem occurs while I accelerate. Maybe throttle position switch could cause this after all. I have not been able to get bosch diagnostic tool. where can I find some article about reading the fault codes via engine fault light?
I think I have the jetronic diags somewhere if you need them I can mount a search. They might be online here though: http://citroen.tramontana.co.hu/en/electrics