Wow if that isn’t vanagon syndrome then what is?  Seriously - it is a legitimate condition or just a catch-all to explain a number of different scenarios?

I am assuming then they are almost identical symptoms with different causes then?

Thanks
Jeff

> On Mar 20, 2016, at 9:04 PM, Dennis Haynes <d23haynes57@HOTMAIL.COM> wrote:
> 
> Your symptoms are typical of an O2 sensor or system failure. The slight
> improvement in running is also part of that indication. As the sensor goes
> off line the mixture will go rich as the ECU is looking for that sensor
> input. Without the sensor feedback the ECU continues to richen the mixture
> until you get the choke and puke effect.
> 
> Go check the archives for lots of O2 sensor information. You need to test
> both the circuit and the operation of the sensor itself. The sensor is also
> heated so you need to make sure that the heater is good and that the power
> supply to it is also good. When the sensors are weak or the catalyst is shot
> the sensors can get to cold due to highway wind and stop working. From the
> factory there was a deflector clipped on to help with this.
> 
> Dennis
> 
> 
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Jason Ellis
> Sent: Sunday, March 20, 2016 9:59 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Vanagon syndrome...it sucks!
> 
> Ok all, I've searched The Samba and tons of other websites for my issue.
> Maybe one of the gurus here can help.
> 
> I have typical vanagon syndrome symptoms. Driving on highway for a while,
> then suddenly loss of power and bucking.  Turn off engine, restart and all
> is good for an indeterminate amount of time. I did notice that just before
> (10 sec or so) the power loss starts, I seem to have a smoother running
> engine with a hair more power. I also had the syndrome start and I exited
> the freeway with very little power. I shifted into 3rd and it chugged a
> couple of times and the BAM, like a switch was turned on, the van power came
> back. Drove home another 30 min on highway with no problem.
> 
> I have done the following:
> 35v 22uF capacitor between 2(+) & 4(-) on harness to AFM New fuel line,
> pump, filter, tank, and pressure regulator Refurbished, cleaned and flow
> tested injectors New alternator harness
> 
> I have not cracked open AFM. I started to, but I didn't want to screw up
> anything.
> 
> Any thoughts?  Anyone have a spare good AFM I could test out?  I hate to
> spend money on a AFM when I could be sourcing parts for either an engine
> swap or a Megasquirt setup. I'm at my wits end. I drove about 70 miles on
> Friday and during a 30mile stretch I had the syndrome pop up every 1/2 mile.
> 
> Thanks for the help!
> 
> Cheers,
> Jason Ellis