Dellorto running very rich
Posted: Sat Sep 29, 2018 4:41 pm
My question is, who is using Dellortos on an S4/Sprint with the jets etc. exactly according Workshop manual and how is the engine running ?
I had my carburettors apart for cleaning and to put new gaskets in because the engine never really run well. This was when I noticed they had wrong jets from the PO. So I ordered the correct sizes with new valves and gaskets in the hope it would cure the problem. Unfortunately it is as bad as before. I adjusted the float level, measured fuel pressure, synchronised carbs with an air flow meter, set ignition timing, dwell angle, idle etc.
I had a wide band lambda sensor inserted to tune idle and to measure lambda during driving but it is always too rich and the black plugs confirm that. I'm running 95 octane.
Thanks
Peter
I had my carburettors apart for cleaning and to put new gaskets in because the engine never really run well. This was when I noticed they had wrong jets from the PO. So I ordered the correct sizes with new valves and gaskets in the hope it would cure the problem. Unfortunately it is as bad as before. I adjusted the float level, measured fuel pressure, synchronised carbs with an air flow meter, set ignition timing, dwell angle, idle etc.
I had a wide band lambda sensor inserted to tune idle and to measure lambda during driving but it is always too rich and the black plugs confirm that. I'm running 95 octane.
Thanks
Peter