Hi, I have same fault with my peugeot boxer 2.5 non tubo diesel van. The engine will tick over very low idle but will not accelerate unless a small squirt of EZ start used to boost reves, then it will pick up and accelerate fine. If the revs go below about 1300rpm it will die again and just tick over. I have owned many different Citroens and diesel vehicles (these engines are very similar), always diy but have never came accross such a bazzar fault.
I have checked fuel line (no blocks or leaks), I have replaced fuel filter and sensor gizmo on bottom of filter bowl (what does that actually do?), all filter seals replaced, connections on injector pump look ok (but don't know what they do, it is a Bosh pump).
Don't know what else to do, think it could be somthing simple but have no more ideas.
PLEASE, can anyone help.
Hi, this may be some use .I have boxer van, wouldnt rev over 1500 rpm, there is a small vacume pump that operates a butterfly valve that lets air in to the engine.....its connected by way of a small plastic arm with cup on the end that clips on to a ball at valve end...this ball socket can come of (unclip)thus not letting air in to the engine...thus wont rev....simple fix ....clip it back on....affects 2.0...2.2 hdi models....if it wont stay on cut a small piece of cloth half inc square place it over ball end and clip cup on...works!!