I've just completed a conversion on my series 1.5 (XU9) Mi16 with a series 2 (XU10) engine.
.. i broke the XU9 and got the XU10 cheap...
Anyway, after about 2 weeks of working out which wires to cut and join in the engine bays, the engine starts and all the gauges appear to work fine.
The problem i'm having is that the tacho just dies at around 3000 rpm. The dash is still the series 1 and i thought that might be an issue so i have grabbed the series 2 tacho and tried it but still getting the same result.
The tacho is very smooth up to 3k so it doesn't appear to be noise.
The input wire (from the computer, 112) maintains a voltage the entire time.
I'm not sure what else to check or try.
I read some forums about alternators overcharging and causing the same problem so i changed the alternator back to the original off the 1.9 engine but still experiencing the same issue.
Anyone got any ideas about this??