Hi Mark,
Your symptoms sound typical of a failing crank position sensor, located at the top of the bellhousing where it meets the block. The wire comes up and meets the wiring harness at the firewall near the distributor. There are two versions of this sensor, one has a yellow strip on the wire just below the plug, one has white, and one's better than the other - I'm sorry though, I don't recall which is which... Someone will post that or you can check the 700/900 FAQs, it's mentioned there. May also be a failing fuel pump relay, before your next warm start attempt, tap on the relay a few times then try starting. And as you mentioned it may be a failing fuel pressure regulator, after you've stopped the car pull off the vacuum hose and check for gas leaking from the regulator. No doubt there'll be more suggestions... good luck! And try to find out what your mechanic meant by 'surprising.'
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Chris, Dartmouth NS Canada 70 M-B 280SE, 83 245DL, 84 244 turbo, 90 780 turbo, 92 VW Golf
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