652 visa ignition
Moderator: RichardW
652 visa ignition
some one i know has 652 visa tried changing ecu,coil,it drives for a while then cuts out,two days ago he drove it 10 miles left it running it cut out now wont start,tried old ecu back on still dont start,there is live at coil and tick over solinoid with ignition on,he tested sensors week ago said they checked out ok,ant ideas regards malcolm
Malcolm -
The Visa engines does not have an "ECU" [;)]
- it's a fairly simple transistor-ignition module.
Same type as you find on all AX/BX/CX carburettor engines - and more : the ignition setup is exactly the same on these models.
Furthermore you can use ANY round ignition coil for testing. It's only for higher engine revs you need the special low-ohmic coil.
You have a strong blue spark - at least 12mm in lenght when testing the ignition ?
And it appears at ALL 4 plugs ?
BTW : I have only ever replaced the ignition module once on my present runner - out of 5 BX'es and 1 CX in my ownership.
But several times I have had problems with the 7pole connector for the module.
The Visa engines does not have an "ECU" [;)]
- it's a fairly simple transistor-ignition module.
Same type as you find on all AX/BX/CX carburettor engines - and more : the ignition setup is exactly the same on these models.
Furthermore you can use ANY round ignition coil for testing. It's only for higher engine revs you need the special low-ohmic coil.
You have a strong blue spark - at least 12mm in lenght when testing the ignition ?
And it appears at ALL 4 plugs ?
BTW : I have only ever replaced the ignition module once on my present runner - out of 5 BX'es and 1 CX in my ownership.
But several times I have had problems with the 7pole connector for the module.
anders! i know i had dealings with these system years back when i worked at citroen service agents,i also have not as yet had time to go through this car myself,i have just relayed info over phone to my freind,he has borowed a coil of the 652 visa i am breaking,add on this site for sale,i do know it is no an ecu i was yoking much regards malcolm
Malcolm, a lot of the 2cv 4x4's run the 652cc engine complete with "brain". I go on quite a few off road weekends.
Our usual problems are either dirty flywheel sensors, or intermittant contact at the sensors. The other thing worth checking is all earths, especially the ones to the ECU. I've had them where they just will not fire at all, often earthing direct to the battery negative and cleaning all earths then vaselining them helps.
Jon
Our usual problems are either dirty flywheel sensors, or intermittant contact at the sensors. The other thing worth checking is all earths, especially the ones to the ECU. I've had them where they just will not fire at all, often earthing direct to the battery negative and cleaning all earths then vaselining them helps.
Jon
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