[Neilnaz]

Hi, I have a 71 911T Targa that drives really well. It is of German origin imported to the UK in the mid-70s then onwards to NZ in 1976 (if I remember the documentation correctly).

The minor issue I have is that the car stutters at revs of 4,000-5,000 before really lifting up its skirts and screaming up to 7,000. If I apply 3/4 throttle and accelerate more gently the phenomenon is more exagerated. If I floor the throttle pedal it seems to blast through with less of an issue.

I am no expert with Weber carburettors hence the post. I am sure that a service kit would be a good idea and to clean the carbs and set the float levels (etc.). But if those symptoms persisted following a good service is that symptomatic of going slightly lean?

The engine did receive some work in 1988 where the pistons and cylinders were changed and an S cam and timing adopted. I haven't established exactly the specification of the engine although this is probably not relevant to the problem. It may however be relevant when comparing Weber jetting where my engine may need something different from the standard 2,200 T engine.

Your thoughts would be greatfly apperciated.

Regards, Neil