Hi 

        Start with Dennis recommendations. 

So many different causes for something like this.  You will need to follow a list of checks. 

And if fuel filters and such were not changed in your memory then only good can come from changing them.

For me the ultimate cause of a similar issue was a bad brand new AFM from GW.  Many attempts to fix did not improve things until I used a AFM that a list member sent me through Dennis Haynes.  That gift saved the day! 

Van is running great for the last two years. 
Before that we tried ,

Wiring harness, New Temp 2 sensor, new O2 sensor and wire check. 
New throttle body. 
And bunches of grounds. 

It could be any of those things.  But for us, a new bad AFM was the sneaky culprit.

Keep us posted.

> On Apr 12, 2025, at 10:01 AM, Dennis Haynes <d23haynes57@HOTMAIL.COM> wrote:
> 
> Temp 2 sensor and O2 sensors first place to look. Wiring and grounds common problems. Many of the engine wiring harnesses are now becoming compromised as the insulation is failing and the wires are corroding within.
> 
> Dennis
> 
> 
> -----Original Message-----
> From: Vanagon Mailing List <vanagon@gerry.vanagon.com> On Behalf Of Markus Benne
> Sent: Saturday, April 12, 2025 9:56 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Vanagon Stalling Out While Driving
> 
> My bus has developed an escalating issue where it it will bog while driving for a second, then keep going.
> This has been going on for about a year, but it is suddenly much worse, to the point of the car actually stopping.    Usually it will eventually restart and run fine for a little while before recurring.  Frequency is increasing.
> I needed a tow the other day for the first time, and I'm about to trouble shoot, but it was placed badly (couldn't open rear hatch), and although it started badly, it did start, and is now running fine.   Grrr.
> 
> 
> Exhaust isn't blocked as far as I can tell ie exhaust is coming out.Air filter seems ok.Fuel supply next I guess.
> Any input appreciated.