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



 
 
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  #21  
Old October 14th 17, 03:51 PM posted to rec.autos.tech
RalphD66
external usenet poster
 
Posts: 11
Default 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.
Ads
  #22  
Old October 14th 17, 03:53 PM posted to rec.autos.tech
RalphD66
external usenet poster
 
Posts: 11
Default Why is my 1985 s 10 2.8 engine so hard to start ?

On Saturday, October 14, 2017 at 8:58:32 AM UTC-5, Scott Dorsey wrote:
> Bill Vanek > wrote:
> >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.

>
> Is coking really an issue with modern engines and fuels?
>
> I remember my father talked about taking the car to the mechanic every
> spring to pull the heads and scrape everything down with a chisel,
> back when HE was a kid.
>
> Shouldn't be TOO hard to clean the intake.... but the original poster
> has had the carb off and should have seen if it was gunked up in there.
> --scott
> --
> "C'est un Nagra. C'est suisse, et tres, tres precis."


The intake is fine.
  #23  
Old October 14th 17, 03:56 PM posted to rec.autos.tech
RalphD66
external usenet poster
 
Posts: 11
Default Why is my 1985 s 10 2.8 engine so hard to start ?

On Saturday, October 14, 2017 at 8:41:54 AM UTC-5, AMuzi wrote:
> On 10/13/2017 11:15 PM, RalphD66 wrote:
> > On Friday, October 13, 2017 at 10:08:37 PM UTC-5, AMuzi wrote:
> >> On 10/13/2017 8:56 PM, wrote:
> >>> On Friday, October 13, 2017 at 5:17:53 PM UTC-5, Xeno wrote:
> >>>> On 14/10/2017 6:35 AM, ben91932 wrote:
> >>>>> Everything that Scott said was spot-on accurate.
> >>>>> With the engine cold, did you look down the carb with the choke open and work the throttle several times to see if you get a solid stream of gas yet?
> >>>>> Let us know...
> >>>>> Ben
> >>>>>
> >>>> Nobody seems to have asked the pertinent question;
> >>>>
> >>>> Is it hard to start *hot and/or cold*???
> >>>>
> >>>> It makes a big difference as to where you start and direct your diagnosis
> >>>>
> >>>> --
> >>>>
> >>>> Noddy! Have you made that call, sent that email?
> >>>> The number to call: 1300 304 064
> >>>> The email address:

> >>>>
> >>>>
> >>>> Xeno
> >>>
> >>> its harder to start when its cold. but it still dont start right when its hot.
> >>>
> >>
> >> You mentioned 'rebuilt carb'.
> >>
> >> I don't know and I don't know your vehicle but rebuilt
> >> carburetors nowadays can have the wrong aperture(s) in the
> >> venturi cluster. Rebuilders seem not so diligent about
> >> matching these for each application (many port sizes in the
> >> same part blank get mixed after cleaning and before
> >> assembly). Tracking down the actual spec and wire-gauge
> >> measurement are tedious but if you've eliminated all else,
> >> compare that to your original. Drove me nuts until I checked
> >> it and swapped in the original.
> >>
> >> --
> >> Andrew Muzi
> >> <www.yellowjersey.org/>
> >> Open every day since 1 April, 1971

> >
> > I dont understand aperture(s) in the
> > venturi cluster.
> >

>
> The little holes have to be just the right size
>
>
http://www.carburetor-parts.com/thum...axx=700&maxy=0
>
> --
> Andrew Muzi
> <www.yellowjersey.org/>
> Open every day since 1 April, 1971


I dont have that piece in my carb. My car is a rochester varijet 10785350
  #24  
Old October 14th 17, 03:58 PM posted to rec.autos.tech
RalphD66
external usenet poster
 
Posts: 11
Default Why is my 1985 s 10 2.8 engine so hard to start ?

On Saturday, October 14, 2017 at 4:22:18 AM UTC-5, dsi1 wrote:
> On Friday, October 13, 2017 at 7:47:52 PM UTC-10, 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.

>
> It's your electric choke on the carburetor. Look for the thermostat housing on the side of the carb and adjust it.


I converted the choke to manual.
  #25  
Old October 14th 17, 07:27 PM posted to rec.autos.tech
Bill Vanek[_2_]
external usenet poster
 
Posts: 82
Default Why is my 1985 s 10 2.8 engine so hard to start ?

On Sat, 14 Oct 2017 07:51:42 -0700 (PDT), RalphD66
> wrote:

>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.


Well then, did you check to see if there is any fuel in the float bowl
in the morning? That's really about all it can be. Or that combined
with a fuel line that is also empty, and possibly a fuel pump issue.
Did you at least look to see if the accelerator pump is squirting in
the morning?
  #26  
Old October 14th 17, 08:59 PM posted to rec.autos.tech
dsi1[_11_]
external usenet poster
 
Posts: 331
Default Why is my 1985 s 10 2.8 engine so hard to start ?

On Saturday, October 14, 2017 at 4:58:08 AM UTC-10, RalphD66 wrote:
>
> I converted the choke to manual.


Visually check to make sure your choke is working correctly.
  #27  
Old October 15th 17, 01:18 AM posted to rec.autos.tech
RalphD66
external usenet poster
 
Posts: 11
Default Why is my 1985 s 10 2.8 engine so hard to start ?

On Saturday, October 14, 2017 at 1:27:30 PM UTC-5, Bill Vanek wrote:
> On Sat, 14 Oct 2017 07:51:42 -0700 (PDT), RalphD66
> > wrote:
>
> >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.

>
> Well then, did you check to see if there is any fuel in the float bowl
> in the morning? That's really about all it can be. Or that combined
> with a fuel line that is also empty, and possibly a fuel pump issue.
> Did you at least look to see if the accelerator pump is squirting in
> the morning?


Not yet but im going to soon. Ill let you know.
  #28  
Old October 15th 17, 08:08 AM posted to rec.autos.tech
Xeno
external usenet poster
 
Posts: 363
Default Why is my 1985 s 10 2.8 engine so hard to start ?

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?
>



--

Noddy! Have you made that call, sent that email?
The number to call: 1300 304 064
The email address:


Xeno
  #29  
Old October 15th 17, 08:18 AM posted to rec.autos.tech
Xeno
external usenet poster
 
Posts: 363
Default Why is my 1985 s 10 2.8 engine so hard to start ?

On 15/10/2017 12:58 AM, Scott Dorsey wrote:
> Bill Vanek > wrote:
>> 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.

>
> Is coking really an issue with modern engines and fuels?


Yes but it has a lot to do with how the fuel enters the engine. In a
diesel, the fuel is injected directly into the combustion chamber. Same
as with Gasoline Direct Injection. That means that any fuel, or oil,
that gets into the intake system on these engines can *burn* onto the
*back of the inlet valve* and turn into a hard carbon build up - coking.
If you're wondering how fuel gets into the manifold if it's injected
directly into the combustion chamber, think of PCV and EGR systems.
Also, some GDI systems use valve timing as a pseudo EGR system.

This should explain it;

http://www.aa1car.com/library/intake...di_engines.htm

and this;

http://www.aa1car.com/library/what_i..._injection.htm

>
> I remember my father talked about taking the car to the mechanic every
> spring to pull the heads and scrape everything down with a chisel,
> back when HE was a kid.


Different kind of coking. That's combustion chamber coking.
>
> Shouldn't be TOO hard to clean the intake.... but the original poster
> has had the carb off and should have seen if it was gunked up in there.
> --scott
>



--

Noddy! Have you made that call, sent that email?
The number to call: 1300 304 064
The email address:


Xeno
  #30  
Old October 15th 17, 08:23 AM posted to rec.autos.tech
Xeno
external usenet poster
 
Posts: 363
Default Why is my 1985 s 10 2.8 engine so hard to start ?

On 15/10/2017 1:56 AM, RalphD66 wrote:
> rochester varijet 10785350


I am surprised you bought a *rebuilt carb*. Those are not generally
considered worth rebuilding nor were they designed to be rebuilt. What
is generally done is a brand new replacement and, from what I recall
from that era, they were not expensive as a new part. Certainly the
parts and labour cost would exceed the cost of a new car, if my memory
serves me correctly.

This may be where your issue lies. The Varajet was supposed to be a lean
burn unit for pollution control. It may be set a tad too lean. That will
definitely give you hot start issues at the very least.

--

Noddy! Have you made that call, sent that email?
The number to call: 1300 304 064
The email address:


Xeno
 




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