Date: Mon, 15 Jul 2013 20:49:50 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: engine bucking and bogging - simple answer
Content-Type: text/plain; charset="utf-8"
Check the wiring/connections to the temp 2 sensor next.
Dennis,
From my phone.
________________________________
From: Alistair Bell<mailto:albell@SHAW.CA>
Sent: 7/15/2013 7:47 PM
To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
Subject: Re: engine bucking and bogging - simple answer
Nope, no change with O2 sensor disconnected.
No change when O2 sensor connected and ign switch cycled.
Only change with the first 2 occurrences was when I refuelled.
Last time, there was improvement when isopropanol added to tank and TPS switch adjusted. No problems since filling up tank.
I'm thinking I'm getting bad gas, or making bad gas (water condensation). But it has never happened in winter, only in summer.
alistair
On 2013-07-15, at 2:00 PM, Dennis Haynes wrote:
> O2 sensor. Test! When it does that cycle the ignition switch. If it goes away for a short period O2 sensor or wiring it is. Also, when floored the O2 sensor is ignored.
>
> Dennis,
> From my phone.
> From: Alistair Bell
> Sent: 7/15/2013 3:59 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: engine bucking and bogging - simple answer
>
> Another minor story.
>
> August 2010, 6 day trip into fairly remote logging roads on west coast of Vancouver Island. Van running fine until one day, mid day, it starts bogging and missing and stalling. I spent a couple of hours looking at the engine (wasn't a heck of a lot I could do out there). We could still drive, the problem would come and go with no rhyme or reason. We made it to Nitinat village and filled up with gas. Problem didn't come back. Oh BTW, I had replaced the fuel filter the month prior to trip.
>
> A year later, 2011, in the interior of BC (Cariboo area, travelling east down to Little Fort to then go down to Kamloops) the same thing happened. Exactly the same symptoms. Problem disappeared after next gas fill up.
>
> No problems in 2012.
>
> And now, weekend before last, same thing happened. Logging road travel, warm day, about 1/2 tank gas. I fiddled with engine again, nothing obviously wrong. We could make it back home, the problem was on and off. When it did buck and bog, I found that flooring it would make engine run normally. Next day the problem was still there. I took off TB and adjusted throttle switch. I added 250 ml of isopropanol to gas tank. Problem went away, mostly. Just the occasional hiccup. Filled up with gas, no problems since.
>
> I'm really suspecting bad gas, ie water in gas tank. I can't think of any other reasons.
>
> alistair
| 
