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Date:         Thu, 12 Aug 2010 10:02:40 -0700
Reply-To:     Karl Wolz <wolzphoto@Q.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Karl Wolz <wolzphoto@Q.COM>
Subject:      Re: AFM intermittancy result?
Comments: To: "Mike \"Rocket J Squirrel\"" <camping.elliott@GMAIL.COM>
In-Reply-To:  <4C640021.7050803@gmail.com>
Content-Type: text/plain; charset="US-ASCII"

That would be near instantaneous. You would just feel a bit of a hiccup.

Dave just posted a procedure that involved grounding the AFM itself, which I don't believe was done on my van; might be worth a try.

Have you had any issues since putting in the new ECU?

Karl

|-----Original Message----- |From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of |Mike "Rocket J Squirrel" |Sent: Thursday, August 12, 2010 7:07 AM |To: vanagon@GERRY.VANAGON.COM |Subject: Re: AFM intermittancy result? | |So a small bad spot on the AFM track would cause the ECU to shut off the |injectors, resulting in a full lean condition and immediate loss of |power. When that happens, the AFM's wiper will swing to another part of |the track, causing the ECU to start firing the injectors again, causing |the engine to pick back up. | |I wonder how many seconds that process would take -- from "Hey, the |wiper has lost contact with the track so I'm shutting off the |injectors!" to "Oops, I see contact again and will start firing the |injectors!" | |-- |Rocky J Squirrel | | |Scott Daniel - Turbovans wrote: |> I think that will cause the injectors to not be fired by the ecu. |> |> it won't affect fuel pump .... |> since it will start and idle with no air flow meter at all, |> or AFM unplugged. |> |> I'm guessing that if it's not at WOT or Idle .. |> it depends on AFM contact to keep the injectors firing. |> |> ( ecu keeps fuel pump relay energized because it sees the engine turning |> from the ignition system. ) |> |> Scott |> turbovans.com |> |> |> ----- Original Message ----- From: "Mike "Rocket J Squirrel"" |> <camping.elliott@GMAIL.COM> |> To: <vanagon@GERRY.VANAGON.COM> |> Sent: Wednesday, August 11, 2010 6:05 PM |> Subject: AFM intermittancy result? |> |> |>> What will the ECU tell the engine to do if the AFM's wiper loses contact |>> with the track with the engine under high load condition, throttle |>> depressed but not WOT (i.e., neither microswitch on the throttle |>> assembly activated)? |>> |>> -- |>> Rocky J Squirrel |>> 84 Westfalia: Mellow Yellow ("The Electrical Banana") |>> 74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.) |>> Bend, OR |>> KG6RCR |>


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