donor 2.1 fitted

Hi group.

This has been a pretty big weekend.  I took on the challenge of the 2.1 donor motor swap.  I found a 2.1 for $800 in reasonable condition with 180kms.  (bargain?).  Pulled out the old motor (head problems) and fitted the donor one within 2 long nights.  Found out a few problems the hard way, one being that a 2wd engine frame is smaller than the syncro frame. (though the engine looked strange sitting 10cm higher than before). 

Anyway everything went to plan, it cranks over well, drives fine with plenty of power however as soon as you slow down for a u turn or the stop lights it will chug like a choke is on and then stall (if you let it).  Crank it back over and its fine again.  Is this an air flow sensor issue?  I swapped the little unit on top of the manifold which I assume is the air flow sensor off the donor engine with the old original engine to see if it made a difference but it was still the same.  If anyone has any clues or advice I thank you.  Also when I first cranked it over it ran pretty rough with some blackish smoke so I dissconnected the lead out of the air flow sensor* and plugged it back in.  It ran fine after that.  . . . . . .    

I uploaded a few photos there as well 


Bartley Olsen



Sorry about some photos there,  attempting this task alone made me a little insane at times.


Stay connected to the people that matter most with a smarter inbox. Take a look.
Gday Bartley,

Last Saturday, I experienced for the first time a loss of power while
driving locally and in traffic some 18klms from home, my symptoms were a
variation compared to yours (lost power but mine still idled variably
between smooth and rough but not stalling nor smoking).

Switching off the ignition key (motor stops) and then restarting, engine
power was restored, albeit a short while. I drove the 18klms home by
turning Off/On the ignition each time the motor lost power .... made it
home ok.

At home, I disconnected the heavy green O2 sensor wire (which I
understand enables ECU default settings), the engine then operated ok
again, perhaps with a faster idle. You did much the same.

I'm tending to think these sort of symptoms are not "official" vanagon
syndrome, more the case of a component/connection malfunctioning
somewhere in the system, the trouble is tracking down the culprit.

In my case, my O2 sensor is only 18 months and less than 10K klms old
and I checked it today at the disconnected green thick sensor wire at
operating temperature and the multimeter read 0.95 volts, which I think
is ok, someone may have an opinion on that.

If the O2 sensor is ok, I'm wondering then if my original 19 year old
Catalytic Converter is no longer functional, meaning the O2 sensor
cannot deliver the sensing correctly to the ECU, hence the erratic
running when connected. I've also recently done the maintenance
procedure on the AFM as per Peter Kestels instructions and pics in the
files section of this forum. I can say the accelerator is quite
responsive now, which is how it should be if the AFM is functioning
properly, so my AFM seems to be ok and eliminated from the culprit list.

So Bartley, seems to me and based on so many other syncro owners input,
it's a case of elimination of the myriad of components/connections that
sooner or later can and do fail ... just ask Peter Kestel, read his
doccos for a few clues. Meanwhile we are both left with head scratching
eh.

Any thoughts from others would be appreciated.

Cheers and good luck Bartley.

Ken

- In Syncro_T3_Australia@yahoogroups.com, Bartley Olsen
<bartleyolsen@...> wrote:
>
> Hi group.
>
> This has been a pretty big weekend. I took on the challenge of the 2.1
donor motor swap. I found a 2.1 for $800 in reasonable condition with
180kms. (bargain?). Pulled out the old motor (head problems) and fitted
the donor one within 2 long nights. Found out a few problems the hard
way, one being that a 2wd engine frame is smaller than the syncro frame.
(though the engine looked strange sitting 10cm higher than before).
>
> Anyway everything went to plan, it cranks over well, drives fine with
plenty of power however as soon as you slow down for a u turn or the
stop lights it will chug like a choke is on and then stall (if you let
it). Crank it back over and its fine again. Is this an air flow sensor
issue? I swapped the little unit on top of the manifold which I assume
is the air flow sensor off the donor engine with the old original engine
to see if it made a difference but it was still the same. If anyone has
any clues or advice I thank you. Also when I first cranked it over it
ran pretty rough with some blackish smoke so I dissconnected the lead
out of the air flow sensor* and plugged it back in. It ran fine after
that. . . . . . .
>
> I uploaded a few photos there as well
>
>
> Bartley Olsen
>
>
>
> Sorry about some photos there, attempting this task alone made me a
little insane at times.
>
>
>
> Stay connected to the people that matter most with a smarter inbox.
Take a look http://au.docs.yahoo.com/mail/smarterinbox
>