Ferrari Mailing List: Re: 328 reluctant dead cold start

[Rick Meisch (Meisch]

Exactly. 

On Sep 28, 2010, at 8:25 PM, "Grahame Reinthal" <grahame [at] reinthal.com.au> 
wrote:

> Ah, I get what you mean, Rick. I'll have to investigate what the pressure
> regulator does when the system is off i.e. does it still hold the upstream
> pressure? If so, this scenario is very plausible.
> 
> So over time (a week or more in this case) the pressure in the lines could
> be gradually pushing enough fuel through the injectors into the cylinders to
> cause the problem, but if it's only a few days of such seepage, it's not
> enough (yet) to cause a starting (flooding) problem.
> 
> On the other hand, if the regulator drops the upstream pressure when the
> system is off, it is less likely, I think, that gravity is draining the
> lines through the injector pintels so the problem would be elsewhere.
> 
> Grahame
> 
> -----Original Message-----
> From: Rick Meisch [mailto:Meisch [at] sbcglobal.net] 
> Sent: Wednesday, 29 September 2010 11:07 AM
> To: Grahame Reinthal
> Cc: The FerrariList
> Subject: Re: [Ferrari] 328 reluctant dead cold start
> 
> Graham,
> The leak would be internal allowing seepage of fuel into the cylinders.  The
> fuel would be there even before before you even walk up to the car. I do not
> think a visual would give you an indication.  
> 
> Rick
> 
> On Sep 28, 2010, at 7:45 PM, "Grahame Reinthal" <grahame [at] reinthal.com.au>
> wrote:
> 
>> Wow, thanks for the quick responses. Just to give you a bit more
> information
>> and answer your questions, the motor has done about 40,000km. It's a
> little
>> bit difficult to pinpoint the issue because, although it is a 1988 Mondial
>> motor, it has been transplanted into my 1977 308gt4. I have also installed
>> EFI (348 rails and injectors plus various sensors) with a high pressure
> fuel
>> pump, different ignition modules and the computer is now a MoTec.
> Everything
>> else about the motor is essentially standard and I still use the original
>> plenum with its cold start sensor/injector (which I guess could also be
> the
>> culprit). Once it is up and running, the motor runs perfectly. 
>> 
>> Also found an old post in FerrariLife which said the Thermal Time Switch
>> sensor on the manifold senses the block temp, and injects fuel into the
>> cylinders until the car warms up. If it isn't working probably, it's a
> real
>> bitch starting when cold and will run rough for a while until the block
>> heats up. I guess this is also referring to the cold start sensor/injector
>> set-up.
>> 
>> Clyde, I'll go out now to check the connections to the sensor in the
> coolant
>> recovery tank. Also, thanks for the "Start easy first then go hard"
> advice.
>> ;-)
>> 
>> Rick, yes, I have checked all fuel lines and there is no external leakage.
>> Internally, there is an in-line fule pressure regulator. After it has been
>> sitting for a week or more, I make sure all the lines are fully
> pressurised
>> before I start cranking, by turning on the ignition till the pump stops,
>> then off, then on again till the pump stops, then off, then on again. I do
>> this until there is no more priming. Only then do I start cranking. 
>> 
>> 
>> Cheers,
>> 
>> Grahame
>> 
>> 
>> -----Original Message-----
>> From: Rick Meisch [mailto:Meisch [at] sbcglobal.net] 
>> Sent: Wednesday, 29 September 2010 10:04 AM
>> To: Grahame
>> Cc: The FerrariList
>> Subject: Re: [Ferrari] 328 reluctant dead cold start
>> 
>> Sorry hit send before finishing....
>> Continuing thought from other message...
>> What I am thinking may be the fuel regulator or even injector leakage.  
>> 
>> On Sep 28, 2010, at 6:48 PM, clyderomerof4 [at] bellsouth.net wrote:
>> 
>>> Chk the connections to the senor in the coolant recovery tank this tells
>> the computer the car is cold. Start there 
>>> 
>>> Clyde
>>> Sent via BlackBerry by AT&T
>>> 
>>> -----Original Message-----
>>> From: "Grahame Reinthal" <grahame [at] reinthal.com.au>
>>> Date: Wed, 29 Sep 2010 09:34:36 
>>> To: Clyde<Clyderomerof4 [at] bellsouth.net>
>>> Cc: The FerrariList<ferrari [at] ferrarilist.com>
>>> Subject: [Ferrari] 328 reluctant dead cold start
>>> 
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