Vincent

        Have You posted this to the SubaruVanagon Gruop ~

On 3 Dec , 2016, at 11:15 AM, Vincent Dow wrote:

> Hello,
>
> I've written a couple of posts about my van's deteriorating idle.
>
> (1994 *or 95* ej22 in 1982 A.C. vanagon)
>
> It's always had a sticky idle, but now it's gotten unbearable. Lately it's
> been starting at 3500 rpm and sometimes staying there. It's rarely below
> 2000 rpm anymore. it will occasionally settle down to 900 and act normal.
>
> after 15 minutes driving in town, the CEL comes on and the idle drops way
> down, big loss of power. I'm convinced it's a vacuum leak - just feels like
> it. Exactly the same conditions as when brake booster hose came off - minus
> the hard-braking.
>
> Today i finally ordered a replacement gasket for the IAC.
>
> On Monday, i'm taking it into my mechanic's shop where he will be restoring
> the spare -tire tray, which was displaced at time of conversion.
>
> I'm going to pull the IACV before the van goes up on the lift... clean it,
> inspect the rubber boot etc.
>
> BUT, before I work on the IACV, I want to check out the TRANSMISSION ID
> wire.
> (I suspect that there are multiple problems with my van's idle)
>
> On the printed OBD1 pin-out chart, terminal B48.20 is listed as the
> Transmission ID.
>
> Do I understand correctly that this identifies if its MT or AT, and it
> would affect the vehicles idle. If my engine and ECU came out of an AT
> Legacy, I would want to reassign it as an MT.
>
> Is this a matter of grounding or ungrounding B48.20?
>
> I really want to see what this does, before beginning on the IACV.