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Hi can anyone help? saxo 1.5d misfires/runs rough bluish smoke. It does run better the more it is reved. The only obvious signs are air bubbles in the fuel lines inlet and return. It seems worse the hotter it gets. misses now and again on idle. new fuel filter fitted, the old one had rust in it? wondering if the lift pump may be damaged?
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Check the fuel hose connection at the filter inlet. It's the "S" shaped hose which runs from the outlet side of the primer bulb to the filter head on the engine.
You will probably find that engine movement has loosened the crimped hose clip. Cut 10 mm off the end of the hose and replace with a proper clip. Any air ingress here causes poor running.
659.
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Thanks for the reply, but i have already checked all off the fuel lines for any leaks.
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If you're seeing air bubbles in the LP fuel lines you've got a leak somewhere. A leak can be small enough not to spill fuel but sufficient to cause air ingress.
Bosch fuel pumps are very intolerant of air on the LP side. If anyone has recently worked on the injectors or glowplugs check also the spill pipes and the rubber blanking cover on No 4 injector (note PSA cylinders are reverse numbered).
659.
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Hi, totally agree with you, its finding it? as its not an outward leak. I am going to rig up an auxcillary tank to the fuel filter, at least this will elliminate all pipework back to the tank, or prove where its not coming from. Trial and error again. The things you do for other people. Thanks again
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