Finally got the new lift pump sorted out.

No more stalling. Regained power and all works as it should.

But now when engine is warmed up the idle ever so slightly fluctuates.

Can feel extra vibration at a stop. Goes away if I put it in park or neutral.

Can see it on the tach and oil pressure gauge.

Maybe 700-750rpm for example.

AC on. Recently fixed. I adjusted the rack damper when I didn't have ac.

Could that be the culprit?

Recently installed a new r4 and new belt.

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1983 300CD Turbodiesel