Hi guys,
I have after many trial and errors found out why car went too rich after overhaul, it appeared that the carbs had HD6 needles, not the thicker and longer HD8 needles. Found the original ones, some UO marked needles, some say UM, or UD or UE is better. So new needles are ordered.
The carburettors have been cleaned and overhauled by experts… Company closed down.
So car now start, no excessive fuel, but it goes direct to 2.500 to 3.000 rpm. Have checked with some Jaguar friends here in Norway and suggestion is false air or throttle butterfly installed the wrong way round.
I have also retightened all nuts to cylinder head and all nuts sitting on top of the inlet manifold binding these three lovely carbs together, have readjusted nozzles so all are aligned, readjusted idling screws etc.
I have also rechecked that the throttle butterifles are closing properly and they based on what I can see, they do close properly, but it is difficult to see whether throttle butterfly is installed the correct direction. I really cannot see that is causing this, 3.000 rpm then a lot of air has to pass through.
I have soaked all gaskets in oil prior to installation of carburettor system, to make certain no false air is the problem. Maybe I have had not enough oil on them?
I blocked the servo brake connection.
After all this, engine still goes crazy, 2.500 to 3.000 rpm, but not more unless I push the accelerator pedal/linkage system. Then it goes up and down like it should, but never less than 2.500 rpm.
Could it be ignition timing incorrect?
I am really stuck here. Some improvement it has been though with correct needles…