320i convertible automatic...hesitancy under acceleration

[paolobianchi]

My BMW is the 320, and it does sound rather tappetty.

124k miles

Just had new heat shields, cambelt and filters and oil etc....

when i rev the engine...it sort of coughs, and misses, then picks up the power....

it can do this for ages, making it impossible to drive because it kangaroos....

the hesitancy/cough is always at the lower end of the throttle range, just as the revs begin to rise...

once revving, it seems to 'clear it's throat'...

i am going to take a video and put it on you tube to explain it better

[RustyRuss]

How is the ignition system? New leads, distributor cap, rotor arm etc can go a long way if the current ones are past their best.

[capri_rob]

Check all the hoses to the intake manifold for air leaks - particularly the bellows from the airbox to the throttle body - these are a common fail point and a split can lead to the symptoms you mention.

Tappety noises are something else.

[paolobianchi]

Russ, Rob...

many thanks for your tips...I will look at this tomorrow hopefully.

It has new heat shields, spark plugs, distributor, rotor arm, air filter, oil filter, ht leads

I ave not looked for split hoses, so will do that....

here is a vid of what is happening...it might explain it better than i can

it starts at about 1 minute in...kangarooing

[RustyRuss]

Thinking about it mate thats what my 525i E34 did when i first bought it and it was a split hose to the inlet manifold as Rob said above, had slipped my mind until he had said that.