I have an occasional gripe with my SII which I would appreciate some help tracking down. Haven’t found quite the same issue on the forum.
I start the car from cold, run with some choke which I progressively reduce until reaching operating temp, which is usually within 5 mins or so. I am running well, but then I have to slow down or stop for a light or a junction, so throttle off. When reapplying throttle … no response, revs don’t pick up and feels like I might stall. Adding more throttle will then result in a sudden gain in power after a second or two and off I go - but this can be a little hairy if, for example, I am in traffic and there is something in front of me as the speed pick up is rapid and unexpected. I have learnt to compensate for this crudely by applying a little choke as I decelerate, which overcomes the issue by keeping the revs a little higher. Once on the move again, I kill the choke and everything is fine.
This issue disappears after some time, it seems once the engine is really nice and hot. But this might be 45 mins or an hour of driving (and not simply once the temp gauge is showing running temp).
Any ideas as to what might be causing this “stickiness” appreciated as ever. Carb? or a throttle cable issue? or fuel pump??
XJC 4.2 SII 1975 (Canadian Spec), Paris