Patient: 1988 5kq Intermittant start

[John Gourley]

I am in a heat wave all the time!   Live in southern Arizona.  I don't find
any difference with my starting problem whether it is at first morning light
and 50 degrees or if it is afternoon and 105.
Also, you mention if you crank it long enough you get a cough or
two................I have never had even a hint of wanting to start.  I turn
the switch off, retry and instant start.

You are wondering  *"if the cold start valve shuts off after a second or two
at warm temperatures. Shutting ignition off and on recycles the cold start
valve for another shot of fuel - and the engine now starts."

*depends on how warm you are talking about..don't recall the numbers now but
above a certain temp, the cold start is not in the picture

If we keep fiddling long enough we might come across the problem.

thanks

John



On Tue, Jun 10, 2008 at 8:53 PM, syljay <syljay at optonline.net> wrote:

> Nope, no resolution yet.
> Too hot outside to fool around with finding a fix.
> The "no start on first crank" appears in the morning also . .at first
> start. We are in a heat wave and I'm wondering if the problem is ambient
> temperature related.
>
> If I crank long enough - 3 to 4 seconds, I'll get a cough or two out of the
> engine. Key off and on and crank, and she starts right off.
>
> I'm wondering if the cold start valve shuts off after a second or two at
> warm temperatures. Shutting ignition off and on recycles the cold start
> valve for another shot of fuel - and the engine now starts.
> Which indicates an air leak in the intake system. Too lean a mix for
> starting, but not lean enough for running.
>
>
> SJ in NJ
>
>
>
>  From: "John Gourley" <azaudi at gmail.com>
>>
>
>
>>  Patient: 1988 5kq
>>>
>>
>>
>>  Problem: Intermittant start
>>> Engine will crank, but not start.
>>> Sometimes, you can hear the engine 'cough' as you turn off the
>>> ignition switch from Crank to Run.
>>> Turn key off and on again, and it starts right up.
>>>
>>
>>
>>
>> Was there a solution for the above problem, which was posted a week or so
>> ago?  If so, I missed it.
>>
>> I've been having a similar situation with my 91 100 front wheeler, stock
>> NF
>> engine.   I am experienced a similar thing....not wanting to start up
>> after
>> warmed up.  ........
>> Puzzling why, after trying to start and it doesn't, I turn the key off and
>> immediately back on and without fail it starts
>> immediately.......................almost as if by turning off the key and
>> right back on, it is resetting something.
>>
>> thanks for any thoughts or ideas.
>>
>> wish the car worked as good as my trusty old 89 200TQA!
>>
>> John Gourley
>>
>