[Vwdiesel] Rebuilt IP / Engine Won't Start

Sun Sep 21 14:46:14 PDT 2008

Only when things are well adjusted and you need a little more power or a
little less smoke should one mess with the fuel screw. an eighth of a turn
on it is miles. A half turn to a turn from correct and the engine probably
either wouldn't have enough fuel to run or the other way it would be
producing clouds of black smoke. Is your idle adjustment screw set so ten
threads show in front of the boss? the idle adjustment screw messes with the
fuel delivery a whole lot. If you have the old pump or can get to someone's
1.6 N/A that is running good then you could set  your pump like that. 1.15
is way beyond turbo specs and might be a problem. something in the high
.80's would be more appropriate.
----- Original Message ----- 
From: "William Longyard" <longyard at ix.netcom.com>
To: <decker at toledotel.com>; <vwdiesel at vwfans.com>
Sent: Sunday, September 21, 2008 2:07 PM
Subject: Re: [Vwdiesel] Rebuilt IP / Engine Won't Start


> Brian,
> I timed the pump at 1.15 initially, though I've tried back and forth a
bit,
> with no results.
>
> The issue is definitely IP:
>
> I just went down and tried adjusting the fuel screw, again, in and out.
If
> I back it out, the engine won't run at all.  I completely removed the
screw,
> took out the washer in front of it, and then screwed it all the way in,
> about 1/8" beyond original setting.  The engine reved much higher, and for
> the first time I could move the throttle without killing the engine.
> HOWEVER, when I moved the throttle the engine slowed down.
>
> What could be wrong inside so that moving the throttle CUTS off fuel
supply?
> This seems to be the issue?
>
> Bill L.
>
> I DO APPRECIATE EVERYONE'S HELP ON THIS!!
>
>
>
>
> ----- Original Message ----- 
> From: <decker at toledotel.com>
> To: <vwdiesel at vwfans.com>
> Sent: Sunday, September 21, 2008 4:40 PM
> Subject: Re: [Vwdiesel] Rebuilt IP / Engine Won't Start
>
>
> > Question number one about your new injection pump. What did you time it
> > at?
> > I haven't read about your pump timing setting which should be somewhere
> > between .82 and the high.90's for an N/A. If your pump timing is on then
> > there are only three adjustments on the pump. on the top nearest to the
> > engine is the idle adjustment screw which should be set to give you an
> > idle
> > of 850 to 950 rpm, With the engine not running I guess that would be
hard
> > but on my Dasher which runs great I show 10 threads in front of the
> > aluminum
> > boss across the top of the pump and  the max throttle screw shows 5
> > threads.
> > The only other adjustment screw on the pump is the fuel screw by the
> > solenoid. This is usualy best left alone but if you turn it a little one
> > way
> > you have no power and if you turn it a little the other way you get lots
> > of
> > power(fuel) and lots of black smoke. If one fools with that adjustment
go
> > easy and remember where you came from. An eighth of a turn makes a big
> > difference usualy. One wouldn't think so but I found when trying to get
a
> > turbo setup going that the idle adjustment screw messes big time with
fuel
> > delivery and I belive if it is very far off the engine might not run.
> > Brian Decker
> > Western Washington
> > ----- Original Message ----- 
> > From: "William Longyard" <longyard at ix.netcom.com>
> > To: "Shawn Wright" <vwdiesels at gmail.com>; <vwdiesel at vwfans.com>
> > Sent: Sunday, September 21, 2008 11:09 AM
> > Subject: Re: [Vwdiesel] Rebuilt IP / Engine Won't Start
> >
> >
> >> Thanks Shawn,
> >> The timing is spot on.  After a couple of hundred revolutions the pump,
> >> crank, and cam still are perfectly aligned.
> >>
> >> I actually had the engine running well after I installed new pistons,
but
> >> then the pump leaked.  The hard start/rough idle, NO acceleration issue
> > only
> >> happened after the new IP pump.
> >>
> >> Again: I can get it to idle with the idle screw all the way out, but
ANY
> >> throttle kills the engine.
> >>
> >> Bill L.
> >>
> >>
> >> ----- Original Message ----- 
> >> From: "Shawn Wright" <vwdiesels at gmail.com>
> >> To: <vwdiesel at vwfans.com>
> >> Sent: Sunday, September 21, 2008 1:44 PM
> >> Subject: Re: [Vwdiesel] Rebuilt IP / Engine Won't Start
> >>
> >>
> >> > On 20 Sep 2008 at 23:09, William  Longyard <longyard at ix.netcom.com>
> > wrote:
> >> >
> >> >> I've got a rebuilt IP pump that I just put on my rebuilt engine.
I'm
> >> >> having
> >> >> trouble starting it.
> >> >>
> >> >> I used new turbo piston in my 1600NA engine, and I ridge-reamed and
> > honed
> >> >> before installing them.  Ring gaps are to specs.
> >> >>
> >> >> My compression from 1-4 is: 380, 385, 380, 375psi.
> >> >
> >> > Those numbers sound ok for a cold engine with new rings.
> >> >
> >> >> I believe this compression is low, but know that the rings haven't
> > seated
> >> >> yet, and those are figures for a stone cold engine.
> >> >>
> >> >> When I crank over the engine for a long time it ALMOST wants to run,
> > and
> >> >> a
> >> >> couple of times I have been able to get it to run for a few seconds.
> >> >> I
> >> >> found
> >> >> that by backing the idle screw all the way OUT, it seems to want to
> >> >> run
> > a
> >> >> little
> >> >> bit more.
> >> >>
> >> >> However, if I step on the throttle it dies immediately.  Is the
> > governor
> >> >> set
> >> >> wrong?  How do I set the governor?
> >> >
> >> > When it runs, does it sound like the timing is off? Could be you've
> >> > skipped a tooth, or the cam
> >> > sprocket has slipped. I'd double check timing, and watch for air in
the
> >> > fuel line. I've only done
> >> > one full rebuild with new rings, and it fired up right away... but
the
> > IP
> >> > wasn't rebuilt, and I
> >> > primed the fuel system first.
> >> > Shawn Wright
> >> > http://members.shaw.ca/vwdiesels
> >> > '88 Westy 1.6TD 5 speed
> >> > '85 Jetta Diesel 1.6NA
> >> >
> >> > _______________________________________________
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> >> > Vwdiesel at vwfans.com
> >> > http://www.audifans.com/mailman/listinfo/vwdiesel
> >>
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> >
> >
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