Low oil pressure making me cry...... - Page 2 - Alfa Romeo Forum
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The crank shaft sensor can fail without generating a fault code as can the fuel pump. I don't think it's oil pump failure either. If you don't feel confident, then get an Alfa specialist to look at it.
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Originally Posted by Bungalow Bill View Post
The oil is black, but doesn't smell burnt and the cam shaft still turns when trying to start the car. No other lights on the dash before, during or after. The oil pressure warning only flashed up that one time, it hasn't shown up again so you may well be right regarding it being a failure elsewhere that's triggered it.
Well if camshaft turns, then it's not the cambelt, which I know is what several of us thought earlier. At this point, I'd go with something electrical. If it's turning over and not firing, there is either no spark, or no fuel.

If you pull the fuel line off near the top back left hand side of the engine, and put it into an old pop bottle, then try start the engine, is there any fuel coming out into the pop bottle??
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I'm with those who doubt your mechanic's diagnosis. Even with a failed oil pump (which is very unusual) if the engine turns over on the key, it would almost certainly start and run - it would soon rattle, of course, but that's another issue!

Definitely check for fuel pressure into the injector rail - if that's OK, start looking at the ignition side.
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if the 1.6 is anything like the 2.0, you would have spun a bearing a split second after the pressure dropped. If stopped, restarting the engine would not be a problem. It would run quite for some time afterwards (please don't ask ...) but with increasingly deteriorating performance and the noise would be UNMISTAKABLE to everyone in a 2-300m radius, at least.
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Thanks for all your advice chaps, but I'm going to bite the bullet and try and get it transported to a recognised specialist. I'll let you all know what the problem turned out to be, and the solution. Thanks again.
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