I've bought a Zed thats had a light(wish) front knock and is now suffering from a starting issue. Basically its starts for a few seconds and then stutters and cuts out, the engine seems ok when it is running so, I suspect that its a vacuum issue or something along those lines. While investigating I noticed that the recirc valves have been removed and capped on the inlet pipes but, there are still open pipes on both sides coming from the tubs in front of the rad. Could this be the cause of the issue? The car was an insurance write-off so maybe its been raided and the after markets BOVs have been removed.
This pic might explain it better...