2.1 dj ..idle stabilization unit.

im wondering if anybody has had any issues ,resulting from malfunctions of this little bugger...



the reason i ask is ,
i had  recurring breakdowns at the end of last year with my 2.1 dj velle .
the van would drive for about ten minutes before completely losing power and dying to a rough idle of 300rpm , pressing the throttle would do nothing ,although the van would start first turn of the key back to the low idle.
after about an hour the van would restart as normal and be fine for another ten minutes or so.
anyway ,last time it left me stranded i called a mate, who suggested plugging the two wires from this idle control unit together .the van fired up as good as gold and got me home without a problem ,i took it off the road for the winter after that .until yesterday.
ive done about 100 miles in the last two days and its been fine ,although the idle is a little erratic and it seems a little sluggish (i might be imagining this).

so could this unit be the cause of my mystery breakdowns and will i do the engine any harm by leaving it bypassed .
cheers
dazz

When I bought my van, (with a 2.1wbx) the two plugs were connected bypassing the device and idle was a bit lumpy.  I plugged it in correctly and it ran fine for a while but would not re-start. Bypassed again and started ok. Bought a new one (at great expense) from JK and it has been fine ever since.

So based on my experience it sounds like the idle stabilization device but before coughing up (£75?) you could borrow one from someone to check...

Good luck

itchyfeet wrote: I think it is common, try a search on stabilisation instead

bloody americanyified spell checker lol.

been using it again today and all is well,i was just a little concerned that it may be doing harm by leaving it bypassed like that,i didnt know if it affected mixture or ignition timing when off the idle circuit,the last thing i want is it running lean and killing the engine.

That unit shown is not the idle stab unit. That is the HALL sender for the distributor. This will fail and give the syptons you descride. Fine when cold then once wran will run but only about 400 rpm and will not rev or do anything. That will be because the hall sender has failed and once cool will run faultlessly. Idl;e stab unit is behind the o/s/r lamp. Not really cmmon for playing up in my experience. HAve you tried cleaning the idle control valve out. LArge cylinder shape on the top of the inlet manifold with a couple of pipes to it and a multi plug. These are common for playing up on mk2 golfs and alike and use the same unit.

That unit shown is not the idle stab unit.

Yes it is

That is the HALL sender for the distributor.

No it isn't!

Hall generator is shown here: http://www.justkampers.com/shop/type_25/type-25-original-vehicle-parts/ignition-system/electronic-ignition/ignition-switch-unit-relay-t-c-i.html

Both Idle Stab unit and Hall generator are located on the bodywork near to the coil, and should be joned to the coil with a y shaped set of cables.

Both go wrong, but the Idle Stab unit goes wrong more often.

Idle Stab Valve and it's control relay (Usually located behind the OS rear light) also go wrong.
As do coils.

My van stalled this morning and I had to wait quite a while to get it to start again, (it was turning over but not firing) then almost at work it started stuttering and the revs dropping, I just managed to keep it going to work.

I'll have a look when I go out at lunch time!

Cheers

Naomi

Edited by Bluestar Bird - 07 May 09 at 11:26