Engine unstable idle

[hamma]

hi,
recently, my engine started to oscillate between 850 and 950 t/min when releasing the throttle (stalled) at fairly hight speed.
when i brake, the idling stabilizes.
please help me getting this fixed

[hamma]

hi,
well, i think the 3rd injector is probably the cause so how can i test it?

[Peter D]

Seal off the vacuum pipe going to the brake servo. If this cures the idel problem I suspect a leaking servo. Regards Peter