[urq] Injector cooling fan...or something else

[Thatcher Hubbard]

Well, I replaced all of the hoses between the IM and the warm-up
regulator.  Initially I thought it had taken care of the problem
completely, but the car still hesitates when accelerating sometimes. 
The hesitations aren't nearly as sharp as they were before.

So maybe my fuel pressure is low?  Where on the car do you adjust
that, or is it adjustable at all?  Forgive the dumb questions, I have
a basic understanding of how CIS works, but how to tune it and how the
ancillary stuff works is still new to me.


On Tue, 16 Nov 2004 13:35:31 -0700, Brandon Rogers <brogers at terrix.com> wrote:
> well I guess it can come on when the car is running - I know I never noticed
> that - although with the car running it would be awfully hard to hear- and
> if you're driving the airflow would likely keep that sensor on the WG shield
> from getting hot enough.  Regrdless- it should in no way cause a stumble at
> low rpm....
> 
> keep us posted...
> 
> 
> 
> Brandon
> 
> ----- Original Message -----
> From: "Thatcher Hubbard" <thatcher.hubbard at gmail.com>
> To: <urq at audifans.com>
> Sent: Tuesday, November 16, 2004 11:34 AM
> Subject: Re: [urq] Injector cooling fan...or something else
> 
> > Interesting, I thought it came on whenever that temp sensor on the
> >
> >
> > On Tue, 16 Nov 2004 09:54:59 -0700, Brandon Rogers <brogers at terrix.com>
> wrote:
> > > That probelm has nothing to do with your injector cooling fan - which
> only
> > > comes on after shut down.  Are you driving the car without the little
> > > odd-shaped hose?  If so bingo (maybe) - I think the WUR uses manifold
> > > pressure to control fuel pressure, too, not just warm up. If you still
> have
> > > it all connected - I would first check for vacuum leaks and check the
> duty
> > > cycle.  Also check fuel pressure.
> > >
> > > hth
> > >
> > > Brandon
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Thatcher Hubbard" <thatcher.hubbard at gmail.com>
> > > To: <urq at audifans.com>
> > > Sent: Tuesday, November 16, 2004 8:34 AM
> > > Subject: [urq] Injector cooling fan...or something else
> > >
> > > > After a four-month head reconditioning project, my car has been back
> > > > on the road for a couple of weeks (thanks to suggestions from a number
> > > > of people here).
> > > >
> > > > I haven't been driving it a lot because there is a fair amount of
> > > > front suspension work I'm going to do on it, I also have all new motor
> > > > and tranny mounts to install.  Oh, and one of my outside CV boots
> > > > cracked while the car was sitting so I have to replace that too.
> > > >
> > > > I have not taken the car over 3500rpm yet, I've been trying to ease it
> > > > into things.
> > > >
> > > > Because I'm waiting for an odd shaped hose that goes on the warm-up
> > > > regulator, and I've not been driving the car hard, and it's quite cold
> > > > outside here in Montana, I have not re-installed the injector cooling
> > > > fan.
> > > >
> > > > A couple of days ago, after driving it to the grocery store, and
> > > > idling it in the parking lot for awhile waiting for my girlfriend, it
> > > > would buck and hesitate when I started from a light or a stop sign.
> > > > After the engine got over 2800rpm, or after I got it into third, it
> > > > would stop doing it.
> > > >
> > > > I always thought that the injector cooling fan was one of those things
> > > > that rarely comes on, I had never heard it, and didn't even know if it
> > > > worked.  But whenever it gets warm, my car seems to do this.
> > > >
> > > > The easy test, is, of course, to re-install the fan, which I'll do
> > > > this afternoon.  I guess my question for the list is this:  Could this
> > > > be the beginning of fuel pump failure?  It only seems to be a problem
> > > > when the car is "hot' and I'm in stop-and-go situations, it does fine
> > > > cruising.
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> 
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