picasso hdi vacume pump? running probs

[mozzy]

hi again, was driving my 2.0 hdi last night when it lost all its power, revs to around 1500 rpm, plumes of browny coloured smoke, so i had a play with it today during work and , there is no eml light on and idles fine, but as soon as i try to increase the revs it smokes, stutters and wont rev past 1500 rpm....if i unplug the hose from the vacum pump, it revs fine, very smoothly but with a bit of blue smoke, if i put my thumb over the vacume pump hole it sucks against my thumb, and still revs freely, it also makes a clicking and sucking sound, as soon as i plug master cylinder pipe back to it, it returns to thick brown smoke and not revving....im close to scrapping it if i dont get it sorted soon, any ideas

[mozzy]

problem solved, god knows how, just started it and its all back to normal?????????? a self repairing car, typical for a french car lol

[spider]

EGR may of been stuck open slightly as (I think, not 100% sure on the later units) it needs the vacuum to operate the valve itself. I first though of the MAF but that would not cause a smoking effect. I guess the EGR may be getting stiff as its clogging with blowby gas / particles over time.

Just an idea.

[lurchy666]

when i saw this last night i thought egr stuck open as well but didnt have time to reply sorry (real life gets in the way sometimes)