Re: re Re: 94 90S stalling

[Phil and Judy Rose <pjrose@servtech.com>]

>In message <v03130301b2491b03ac8b@[206.106.147.12]> Phil Rose writes:
>
>> >The ISV on the 1988 90qs goes past closed when unpowered, presumably to
>> >provide a limp home mode if unpowered.  It will pass air easily unpowered.
>>
>> The ISV functions that way (open when unpowered) in the '91 200q, also.
>
>Who makes this part?  Any part number?
>
>--
> Phil Payne
> Phone: 0385 302803   Fax: 01536 723021
> (The contents of this post will _NOT_ appear in the UK Newsletter.)

I _knew_ you'd be asking sooner or later, so I jotted down the pn when I
had the ISV off for fettling last month.

034-133-455B

I wouldn't swear to it, but I believe it's made by Hieronymous, er, I mean
_Robert_ Bosch. :)

BTW, with this ISV--if it's unplugged while engine idling--the idle rises
to just under 1000 rpm. When it's reconnected, the idle immediately returns
to a hair over 800 (withpout needing to restart). I suppose this behavior
says more about Motronic ECU than ISV design.

Phil R.

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