I am new to posting a new thread. How do I go about it. Thanks in advance~ 
Lin

Sent from my iPhone

> On Oct 1, 2017, at 6:06 PM, Neil N <musomuso@GMAIL.COM> wrote:
> 
> What colour were the plugs? Were they all about the same colour? Sure
> sounds like a rich run situation.
> 
> My guess is that the green O2 coax is shorting out. Remove the
> connector to the green coax, engine off, use voltmeter to check if
> theres any continuity between the centre lead and outer coax. There
> should be none. If you see continuity, slowly bend the coax. See if
> continuity cuts in/out. The other possible cause is a bad hose between
> fuel pressure regulator and intake plenum. (hose has a vacuum leak)
> 
> If you're seeing a coolant leak at thick rubber gasket between head
> and coolant jacket, the leak *may* be at that thick gasket. However.
> This not the head gasket per se. The actual head gasket is between
> cylinder and head. Clean the areas involved, do a pressure test, watch
> for leak(s).
> 
> Neil.
> 
>> On 10/1/17, Bruno Walser <bruno.walser@comcast.net> wrote:
>> 
>> ...... On our way up, in Maine
>> intermittently the car would start to jerk/hesitate. This happened not only
>> at high speeds. It was not the "Vanagon syndrome". I disconnected the
>> oxygen sensor and things got better. So I got a new oxygen sensor installed
>> in Nova Scotia. Car seems to be running ok again, although it felt just a
>> it off.
> 
>> Yesterday I tried to figure out the problem. Now the engine wouldn't even
>> start. I took the spark plugs out. They were completely fouled. I installed
>> new ones. The engine starts up and idles normally, but again it seems to
>> hesitate and jerk and lower RPM's and low load. I disconnected the oxygen
>> sensor again and things seem to be a bit better. I checked timing,
>> temperature sensor, throttle switch, compression, all seems to be ok.
> 
>> BTW, I failed to mention that the engine developed a head gasket leak, but
>> it seem still small (barley lost any coolant on our trip). I was told that
>> the leak should not cause any running issues, at least as long as it
>> doesn't become a more serious leak.
> 
>> Bruno
>> 86 Vanagon Westy, 2.1 WBXwith Digifant
>> 
> 
> 
> --
> Neil n
> 
> Blog: Vanagons, Westfalia, general <http://tubaneil.blogspot.ca>
> 
> 1988 Westy Images <https://picasaweb.google.com/musomuso/New1988Westy>
> 
> 1981 Westfalia "Jaco" Images, technical <http://tubaneil.googlepages.com/>
> 
> Vanagon-Bus VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>