On Tue Feb-26-2013 08:22, TOM WALKER (1:123/140) wrote to ROGER NELSON:

RN>I have a friend with a 2002 (or thereabouts) Pontiac,  She is
RN>afraid to turn the engine off when she goes anywhere because of the 
RN>following:

RN>1. The engine only starts on the 2nd attempt
RN>2. When going somewhere, and shutting the engine off, the car has
RN>to sit for about 30 minutes before the engine can be restarted.

RN>This is a new one on me.  We originally thought it might have 
RN>something to do with the chip in the ignition key, but that didn't 
RN>solve the problem.

 TW> Sounds  like a classis case of "Heat Soak" to me.either there is a
 TW> leaky injector or a bac check valve i nthe Fule system that lets
 TW> the pressure drop off and the engine hear boild the low pressure
 TW> gasoling causing the equilivent of the old "Vapor lock. SO until
 TW> the engine cools down it does not recieve enough liquid fuel to
 TW> start.

That's another possibility I hadn't considered.

 TW> There is a port o nthe fule system where a pressure gauge can be
 TW> installed and one can do a leak down test.

I don't know if that was done.  I'll ask her when she arrives.

 TW> Recomendations vary but the pressure should not leak down faster
 TW> then 2 PSI per 5 seconds. It typically should be much less than
 TW> that.

Thanks.


Regards,

Roger 
--- timEd/386 1.10.y2k+