Skip to main content
Gerry | Vanagon
Checking account...
← vanagon.com home · Continue the discussion in the forum
Subject:Re: o2 sensor didn't solve it
From:John Rodgers
Date:Mon, 30 Jan 2006 09:11:32 -0600

Rob, I haven't been tracking this thread, and I don't know about
Syncro's, but here is something to try.

Disconnect the O2 sensor
Disconnect the idle stabilizer valve.
Start the engine, and allow to warm up thoroughly at idle
Now try to drive it.

If that doesn't do it, check all grounds, and look closely for vacuum
leaks. That hose from the crankcase vent to the AFM is always suspect.
It will rot on the underside and you cannot see it.

I have been through this problem three times, and for each time there
was a different cause.First time it was the Idle Stabilizer circuit. I
disconnected the valve and it ran fine. Second, it was the hose from the
crankase vent to the AFM. Rotted completely through on the underside.
Third, and the most recent - it was the O2 sensor - actually a bad
connection where the O2 sensor was spliced in - but the effect was the
same..

Good luck,

John Rodgers
88 GL Driver

Rob Infante wrote:

>Hmm, put in the new O2 sensor, still doesn't work.  It has all the old
>symptoms of power loss, plus now flipping the ignition on and off doesn't help,  I
>need to crank it quite a bit just to get it to start.  It will then idle  ok,
>but when I try and drive it stalls.  It can go in low low gear and  reverse,
>but first has no power, as do the rest of the gears.  I tried  unplugging the
>O2 sensor again, but it didn't change anything this time.
>
>Any ideas?
>
>rob infante
>87 syncro westy
>boonton nj
>
>
>
>