

| Subject: | Re: AFM intermittancy result? |
| From: | Mike \"Rocket J Squirrel\" |
| Date: | Thu, 12 Aug 2010 07:07:29 -0700 |
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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