Hi Everyone
Wel the Lotus is all assembled again, but it still has the misfire . I can clearly see the backfire through the carbs at this time. And all the cylinders are spitting.
So I took the Lotus to have it dyno tuned. Unfortunately the dyno guys I went to are not too experienced on carbs, so they could not help, but they said the Esprit was running very lean, all the way to 4500RPM, at which time it switched to becoming very rich. So rich they said it was just about flooding! And they said it was running so lean at low RPM, that melting pistons is a possiblility.
All the jets are as specified by the manual, well so I thought.
When I got the car back home I rechecked all the jets, and found that the needle jet was a 150 (on both carbs), instead of a 200 as specified. All the other jest are the correct size. I took the carbs apart and checked that everything is clean and no piping is blocked. This all looked good.
Can the too small needle jet explain why the engine is running lean at low RPM? I would have thought that with a too small needle jet it would run fine at lower RPM and go lean at high RPM.
Any ideas?
Can ignition timing have any effect here?
Kind regards
Brandt