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Delphine,
I'm curious. You have reiterated that you believe the reason for your start problem is oil, crap, or water in the cylinders. How did you arrive at this conclusion? As far as the ether "blowing" this crap out I suppose it would as it is highly flammable.
Does your car have K-Jet (CIS) injection? My 1980 320i had CIS and it is the only car I have ever had with a hot-start issue. I went by the dealer (rare trip) and the service writer told me that some had this problem and some didn't. He also indicated they really didn't know the exact cause (or at least none of them could remember) but on models that exhibited this behavior got the hot-start kit. I've never heard anybody else mention this type of issue on a brick.
Does it always start hard, only when cold, or only when hot? Looking at the troubleshooting chart in the Volvo CIS manual a possible cause of hot start problems on non-turbo CIS systems is too low rest pressure which might lead to a vapor lock condition. Has your mechanic checked the fuel accumalator? It's kinda easy to forget it's down there! As Alex said, if it is a cold start issue then it is most likely the thermal time switch or associated wiring. Then again, if coolant temp is over about 90 degrees (good Texas late spring temperature!) then the thermal time switch won't tell the squirter to do anything.
But, if wiring up a manual switch to your squirter will do the trick it'll be a whole lot cheaper than paying somebody else to figure out what is actually wrong.
Let us know how you make out...
Justin
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