On 14/10/2017 6:52 PM, Bill Vanek wrote:
> On Fri, 13 Oct 2017 22:47:51 -0700 (PDT), RalphD66
> > wrote:
>
>> On Friday, October 13, 2017 at 11:27:15 PM UTC-5, Bill Vanek wrote:
>>> On Fri, 13 Oct 2017 21:25:03 -0700, Bill Vanek >
>>> wrote:
>>>
>>>> On Fri, 13 Oct 2017 21:01:30 -0700 (PDT), RalphD66
>>>> > wrote:
>>>>
>>>>> On Friday, October 13, 2017 at 10:38:11 PM UTC-5, Bill Vanek wrote:
>>>>>> On Thu, 5 Oct 2017 22:28:26 -0700 (PDT),
>>>>>> wrote:
>>>>>>
>>>>>>> Ok,i have been searching for an answer to why my truck is so hard to start. I have done everything i know to fix this but no luck yet . I have put a re-manufactured carburetor on it.I have checked all the vacuum lines,replaced the fuel pump. manual pump. I have a clear fuel filter that look good. I have done a tune up,plugs,wires,cap,pickup module,exc... I have even done a compression test that passes easily. The engine runs good, its just hard to start. Im stumped !
>>>>>>
>>>>>> Is it always hard to start, or just after it's been sitting, like
>>>>>> overnight?
>>>>>
>>>>> It hardest to start after sitting overnight, but its still a little hard to start after its been running.
>>>>
>>>> I think others have already mentioned the obvious, so try a couple of
>>>> other things. In the morning, make sure there is still fuel in the
>>>> float bowl. If not, there might be an internal leak (well plugs).
>>>> Also, check for fuel continuing to drip into the intake - it might
>>>> have a bad needle and seat.
>>>>
>>>> Finally, this is the tough one. There is an issue called "coking" on
>>>> some vehicles. Carbon builds up in the intake near the ports, and/or
>>>> on the intake valves. That carbon - the coking - absorbs fuel vapor
>>>> when you are trying to start the engine, and the result is that the
>>>> engine is too lean to start easily. The main characteristic is that it
>>>> is much, much worse when cold. The fix is obvious if it is a buildup
>>>> on the valves, but if it's in the intake, that's another issue. Good
>>>> luck with that. And I don't know of a proper diagnosis for this. It's
>>>> more like a process of elimination, and that's all that's left.
>>>>
>>>> I also found this discussion on Google, coking is one of the mentions:
>>>> http://www.s10forum.com/forum/f106/1...ed-help-70113/
>>>
>>> I forgot to mentions that another obvious symptom of this is a severe
>>> hesitation until it warms up. That could also be the accelerator pump,
>>> but I'm sure others have mentioned that.
>>
>> There is no hesitation at all. the engine runs great after it starts.
>
> Then it's not coking. If you have a float gauge, check the level while
> it's running. Leave the air cleaner off, and let it sit overnight, and
> check the float level in the morning before you try to start it. If
> the float is bottomed out in the bowl, you have a leak in the float
> bowl, and that's your problem.

Coking is less likely on a carbureted or port fueled engine. Fuel wash
prevents that occurring. That's an issue with diesels and GDI engines.
>
> And to be honest, that doesn't seem all that likely. So let's get one
> thing straight, what do you mean by "hard starting"? Does it crank
> properly, or is it cranking slowly? Does the car start right up and
> then stall repeatedly? Or does it simply crank at proper speed without
> starting from the very beginning, and then finally start after
> extended cranking? And when it does start, is there black smoke, and
> rough running?
>


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