Hi Folks,
My little TL is running really nicely, almost!. I just can't get the tickover mixture right, nor can I get it to stop running rich. I should mention it's the dreaded Zenith 28IF. I've cleaned it and blown it through at least three times, there is nothing blocked or damaged, the car only has 40K on it so the throttle spindle etc is AOK, no wear, no air leaks, tried spraying it and the manifold with carb cleaner, no change. Head and valves all excellent. The car runs really nicely, pulls well and evenly, but running rich. The mixture screw has to be at least 5 turns out for it to tick over and even then it's lumpy.
I have the jets in the air pipes from the rocker cover, 1.5mm to the manifold, 5mm from the rocker cover and the manifold hole is 1.8mm. Float height is correct. It does tickover slightly better with the manifold hole blocked off, but still has to have the mixture screw out loads and still runs rich.
Any ideas?, or does anyone know where I can get smaller jets?.
Cheers,
Alan.
My little TL is running really nicely, almost!. I just can't get the tickover mixture right, nor can I get it to stop running rich. I should mention it's the dreaded Zenith 28IF. I've cleaned it and blown it through at least three times, there is nothing blocked or damaged, the car only has 40K on it so the throttle spindle etc is AOK, no wear, no air leaks, tried spraying it and the manifold with carb cleaner, no change. Head and valves all excellent. The car runs really nicely, pulls well and evenly, but running rich. The mixture screw has to be at least 5 turns out for it to tick over and even then it's lumpy.
I have the jets in the air pipes from the rocker cover, 1.5mm to the manifold, 5mm from the rocker cover and the manifold hole is 1.8mm. Float height is correct. It does tickover slightly better with the manifold hole blocked off, but still has to have the mixture screw out loads and still runs rich.
Any ideas?, or does anyone know where I can get smaller jets?.
Cheers,
Alan.