Re: [ihc] Holley projection help

[John Hofstetter <hofs@xxxxxxxxxxxx>]

On Oct 27, 2004, at 9:56 AM, Steven Stegmann wrote:

> Matt,
>
> Good work on the grounds.  90% of the problems
> according to Holley.
>
> Hmmmmmm  most of these injection systems are actually
> too large for the 345.  You may have several things
> slightly out of adjustment.  If unhooking the O2
> sensor causes flooding enough to kill it, then your
> fuel pressure is probably too high.  Seems to me the
> O2 sensor can command a 30% change in fuel flow,
> enough to mess up the engine if it's the wrong way.
>
> Note what pressure you have now and then I'd get the
> fuel pressure down to say 11-12 psi and disconnect the
> O2 sensor, not sure if there's a jumper to replace if
> the O2 is out of the circut or not.

Grounding the white wire from the O2 control box takes the unit out of 
the system.


>  I belive you can
> set this with the pump running but the engine off.
> You have to work quickly, the pump will run for a few
> seconds when you turn the key on.
In my opinion, Matt should install the gauge into the fuel line. Then 
he can set the pressure with the engine running.


> Once the fuel pressure is right, I'd start *without*
> the O2 sensor and set it back to whatever Holley says
> to get it sort of running out of the box.  I'm sure
> they have some settings to get it running as a
> starting point.
>
> Do they give you any guidance on cold enrichment,
> maybe a "choke" setting of some sort.  Once the
> baseline setup is working, that would be how I would
> compensate for the O2 sensor on a cold engine.
>
> Once you get a baseline setup that runs, when you hook
> in the O2 sensor, you'll probably have to richen up on
> all the controls.
>
> My Projection is a 4Di and I do all this with a
> computer.  So the manner of setup is going to be
> different.
>
> John Hoffstetter has had a 2di for years with good
> results, I'm sure he can offer some advice.
>
> Steve