Date: Mon, 29 Oct 2007 21:21:05 -0700
Reply-To: Michael Elliott <camping.elliott@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Michael Elliott <camping.elliott@GMAIL.COM>
Subject: Re: Definitive test for Hall > ECU?
In-Reply-To: <BAY125-DAV3477CCAE4C12865FB8D3AA0920@phx.gbl>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Thanks, Dennis. I've checked timing, and did the basic throttle bypass
idle adjustment with the stabilizer bypassed, and found that the screw
needed to be turned out (counter-clockwise) about 10 half-turns in order
to get the idle up to the specified speed. However, a fellow Vanagon owner
suggested that this was too far, based on his experience with these engines.
Is this an issue? Anyone know if 10 half turns is significantly far off
the mark?
--
Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
KG6RCR
On 10/29/2007 9:13 PM Dennis Haynes wrote:
> If the ECU didn't see the engine RPM via the distributor hall sensor, the
> engine wouldn?t run. Basics. How does the fuel injection work? The
> injectors, all of them are fired once each engine revolution. This is
> accomplished by the ECU seeing the coil pulses and firing every other one.
>
>
> Now, if the engine is not maintaining idle with the stabilizer bypassed,
> then your basic settings are way off. This may be why you are not seeing
> expected speed changes with the auxiliary air regulator. You are relying
> on the stabilizer way too much. The idle should be set to 850-950 rpm
> without the stabilizer. The stabilizer should only come into play from
> excessive O2 sensor swings or excessive idle loads such as heavy
> alternator demands. The power steering and AC should have boost solenoids
> to increase the idle for their needs.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Michael Elliott
> Sent: Monday, October 29, 2007 6:09 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Definitive test for Hall > ECU?
>
> My Hall sensor seems to be working because when I bypass the idle
> stabilization unit the engine speed changes (it drops, I need to set up
> the bypass screw to keep the engine running). I think this means that
> the ISU "sees" the Hall sensor.
>
> How can I confirm that the ECU is also seeing engine rpm?
>
> --
> Mike "Rocket J Squirrel" Elliott
> 71 Type 2: the Wonderbus
> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
> 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
> KG6RCR
>
| 
