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I'd look elsewhere 900 1993

posted by  Vladimir on  Thu Nov 15 14:54 CST 2007
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last visit: Sun Oct 5 18:40 CST 2014
[RELATED]

Thanks for the reference to the FAQ. I have read through the CPS section and through the temp sensor section and that made me more convinced that the problem is NOT either one of those. CPS failure is hot running related and the temp sensor richens the mixture when bad. Both seem to occur at fully warm states. My problem is: a) intermittent, b) NEVER on warm engine and c) ALWAYS on the first start of the day as in the pump lost its prime and needs extra cranking to build it up. The rough running at first may also be related to the loss of prime and presence of air bubbles in the system. Sound crazy? What of that check valve the pump has? I may already have a replacement pump (I own the car since 150K and the previous owner was very good about maintaining it). Any idea on the pump's check valve? How to check, whether or not my pump is original and has such a valve or it is replacement and lacks the valve?


Thanks!

--
Vladimir. '98 S70 base, 5-speed manual - his, '93 945 (approaching 200K miles and rolling on...) - hers






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