[Vwdiesel] Rebuilt IP / Engine Won't Start

[decker at toledotel.com]

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
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>
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