Hot start issue
dak at rochester.rr.com
Thu Dec 19 13:07:22 EST 2002
I'll just add that I had a hot start issue on my '87 5KTQ and the theory
was the check valve not holding fuel system pressure. Sure enough, once
the fuel pump (w/ check valve) was replace, it went away.
On 12/19/2002 10:10 AM, John A. Mallick wrote:
> It happened while I still lived in upstate NY about a year or so ago. If the car
> sat for about 1/2 hr or so it would be a real bear to re-start. Stone cold it
> started great. I think Phil's theory is a good one. Art Mayhew at Salisbury
> Motorcar thought it might be the fuel pressure regulator, but that tested fine.
> The check valve was shot; Art said that you could just blow right through it. No
> problems since replacement.
> John M.
> Phil Rose wrote:
>>At 5:05 PM -0800 12/18/02, Derek Pulvino wrote:
>>> I was
>>>wondering though why a fuel-system pressure drop wouldn't effect the
>>>starting after longer periods of time. The local shop thought it was due to
>>>the increased temp under the engine bay which would then allow more of a
>>>chance of gas vaporizing and locking up the lines. I wonder what's
>>>consensus on this?
>>This same hot-start problem was discussed at length in several posts
>>just 3 months ago. My theory is that after longer times (overnight)
>>the engine cools enough for the ECU to decide to use a "cold start"
>>program, which employs a longer duty cycle for the injectors. Faster
>>fuel delivery-->faster start.
>>mailto:pjrose at frontiernet.net
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