Date: Sat, 16 Apr 2016 15:32:27 -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 stalling at high speed
In-Reply-To: <020001d19814$2590a7a0$70b1f6e0$@gmail.com>
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The 2 separate throttle switches was replaced with the single cam switch somewhere mid 84. All 85's have the later set up. 86 with the 2.1 also go a larger throttle plate.
However speaking of blockages a catalyst that is broken down into ta golf ball size chunk can also block the exhaust causing engine shut down. If exhaust can’t get out air can’t get in.
Dennis
-----Original Message-----
From: Stuart MacMillan [mailto:stuartmacm@gmail.com]
Sent: Saturday, April 16, 2016 3:14 PM
To: 'Dennis Haynes' <d23haynes57@HOTMAIL.COM>; vanagon@GERRY.VANAGON.COM; Tyler Hardison <tyler@SERAPH-NET.NET>
Subject: RE: Engine stalling at high speed
Tyler has the single wire '85 1.9 O2 sensor according to his first post. Any short would be directly to that wire, easy to check at the harness connection with an ohm meter. That also means he has two throttle position switches, one closed throttle and one full throttle. Misadjusted closed switch will give bucking when crusing around 35 mph but it will clear beyond that.
My money is on a clogged fuel pick up in the tank. I've heard of cardboard getting into improperly packaged tanks and causing this. :-(
Stuart
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Dennis Haynes
Sent: Saturday, April 16, 2016 11:18 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Engine stalling at high speed
When opening the throttle makes things worse it is usually a fuel delivery problem, too lean or too rich can have a similar feel. Try resetting the ignition switch while still rolling. The steering should not lock until the key is turned all the way off and then lifted as when being removed so there should not be a fear of that. If it clears and goes for a while than most likely you have an O2 sensor circuit problem. Could be bad sensor or a wiring problem. A simple wiring test if you have ammeter handy is as follows. Disconnect the sensor and strip back the outer jacket on that green wire to get to the outer braid. With the ignition on (engine not running) check the voltage from the O2 sensor connection to the chassis. Should be ~.5 to .6 volt. Now check the outer braid to chassis. Must be real close to "0". Start engine and check again. Should be the same. If the outer braid is getting stray voltages you have a grounding problem. Anything near or .2 or above can put the ECU into a runaway rich condition.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Tyler Hardison
Sent: Saturday, April 16, 2016 1:12 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Engine stalling at high speed
The engine behaves like it has a very extreme rev limiter in place. If I press in the clutch it dies. From there I can restart the engine like nothing happened.
The AFM was replaced June of last year.
O2 sensor around the same time.
Coolant temp sensor in July of last year.
Cleaned and tested the auxiliary air valve last month.
New throttle body gasket last month.
New fuel filters last month.
New fuel tank two weeks ago.
This problem feels electrical to me. Fuel starvation should cause poor running like a lean condition. Right?