Patient: 1988 5kq Intermittant start

[Grant Lenahan]

1. Weak fuel pump
2. weak fuel check valve

To test either, when cold, turn key to "run" not "start" - listen for  
pump, wait for pump to stop pre-run, and various chimes to end.  This  
pressurizes the fuel systemThen turn key.

Grant
On Jun 10, 2008, at 11:53 PM, syljay 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
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