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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22930
Experience:  BEng hons Mech engineering, in auto industry 22 years
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2002 inca 1.9 sdi

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2002 inca 1.9 sdi diesel
warning light on in dash , there's a smell of raw diesel form
exhaust pipe and it idles at 950 rev lowering to 900 and back up again on start up
basically its idling rough and it drives on fine !

I'd suspect that you have a injector thats not sealing so dribbling at idle an so not combusting properly

so the injector cleaner is a good idea and if this doesn't help ( give it a couple of hundred miles)
- the next stage on from this is to remove all the injectors and have them ultrasonically cleaned and flow checked

also check the connections to the EGR valve, if either the vacuum pipe of electrical connection are damaged / corroded then the EGR can be on all time which certainly will hurt performance. Its also possible that its a fault with the EGR valve so its worth removing the valve and cleaning it out with brake cleaner, if it looks particularly clogged then replace it.
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