Goodmorning,
I have (visa) engine trouble, and I cannot find the problem.
I already asked several 2cv friends and specialists but still the same problem
Alright, I will start from the beginning:
After the Waggelmeeting the problem started.
during the waggelmeeting I adjusted my float height of the carburettor and replaced the spark plugs. The first +- 80 km, she drove like a super charger
and then suddenly she began to stutter above 80 km/hour.I did a standard VISA check, so replaced sensors, replaced coil and replaced the computer. This did not help, so the ignition parts are fine.
In the low speed is not so much on, and she runs fine idling. So therefore I conclude that the wire tree also is fine.
As I made some changes to the carburettor, it would be possible that this is the problem. I was already planning to replace the foot gasket of the cilinders because it leaked a little oil. When I did this I also replaced the carburetor. Weber instead of Solex. During this action I checked the cylinders and pistons they looked fine, I also checked the cylinder heads they did not leak cleaning fluid....
However, the problem is not gone. Once I drive for 1 minute at full throttle the engine starts to stutter again. The maximum speed drops to 80 km/h and sometimes to 50 km/h.
I think the problem is not in the ignition (I replaced al the parts). To be sure I have replaced the new spark plugs for other new ones.
Still no success.
I recently got an oil filter adapter with oil temp and oil pressure. However, I have only just connected my meters so I'am not familiar with the normal temperatures. The pressure is constant at 7 bar (6.5 with hot engine, idling +- 1 bar)
The engine temperature runs nicely, but runs through to + -105 degrees (this is right since I checked the sensor in boiled water)
I think the oil temperature is pretty high, for driving on a flat road without pushing it (within a few highway km it is 100 degrees). The stuttering is starting at 80 degrees Celcius, so I don't think the engine is getting too hot.
What I checked:
- That the oil adapter plate, if there is enough oil flow, this is no problem.
- If there is a problem with some false air, seems ok.
- I checked if the fuel pomp is the problem, replaced it although it gave plenty fuel.
What options do I have to check/replace left:
- Check the compression of both cylinders, maybe there is a leaking valve
- If so replace cylinder heads
- Spark plug cables (though this odd, given the fact that the problems
at low speed not do)
- Try an other VISA wire tree
- check the fuel connection on the fuel tank (false air, leaking)
Does anyone recognize these problems? and what was the solution?
Who has more tips? All help is welcome!
Hopefully in the Czech Republic?!
Ciao,
PMD
But to be sure it is better to open the carb!
So I was lucky to have 2 bad fuel pumps and 1 wrong carbu! 