Why is my 1985 s 10 2.8 engine so hard to start ?

On Saturday, October 14, 2017 at 2:52:59 AM UTC-5, 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.
>
> 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?

It spins over properly at proper speed without starting. once it starts it runs fine. no black smoke or rough running.