10v 200tq no warm start...

[illuminaudi at comcast.net]

> > I have a 1990 200tq with a warm start problem. It starts fine cold. If 
> > let it run for 10 minutes and turn it off, I have to wait 30 minutes 
> > before it will restart. If I run it for an hour and shut it off, it 
> > will start right up.
> >
> >
> A quick followup... When it doesn't start, the engine cranks and tries 
> to turn over (sounds like it's going to catch once durring a 6 or 7 
> second crank) but doesnt.
> 
> I've unplugged the mfts and tried to start. I've also tried jumpering 
> the fp relay for 15 seconds to try to build up fuel pressure before 
> starting, but that didn't help either. It just cranks. FP is loud but 
> the archives tell me that's normal (it tells me that it's running).
> 
> Thanks,
> Tony

I just had this problem, with nearly identical symptoms.  The archives generally suggest this to be a fuel system problem.  I troubleshooted the entire fuel system to no avail.  Having spent enough time on it, I took it to a garage (it needed a tune-up anyway).  It turned out to be a faulty distributor cap.  I'd start there first, it's much easier to get at than the fuel check valve, and it will need to be replaced at some time anyway.

-Matt
'86 5kcstq