Idle problem

[cwass99@rogers.com (cwass99@rogers.com)]

    The mystery box is a large (about 4 inches on each side, 1" or so deep)
black thing, lives in the rain tray.

CW

On 03-Jun-2002 T Berk wrote:
> cwass99@rogers.com wrote:
>> 
>> Hi,
>>      I was running through the Bentley tests as part of the ongoing effort
>>      to
>> deal with the Little Beastie's rather erratic idle, and I made a discovery
>> that
>> I don't understand.  I disconnected and plugged things, as per Bentley to
>> set
>> the idle, and it idled really nice.  Best it's been in a long time.  I
>> noticed
>> when I hooked everything back up, the idle went to shit again.
>>      Further tests revealed that if I pinch off the hose going from the
>>      intake
>> manifold to the valve cover, the idle smoothes out.  When I set the idle, I
>> put
>> a block in the end, so I doubt that length of hose is leaking.  I even added
>> clamps where there were none before to make sure the joints weren't leaking.
>> No good, still idles badly.
>>      I guess I should mention it's an 87 8v.  Also, found a part Bentley
>> doesn't mention existing on my car.  It's a big black Jetronic part, 321 906
>> 263 B (for those who have Etka), looks a lot like a knock box.  Except, I
>> don't
>> have a knock sensor and there's no vacuum line into the box that I expected.
>> Any idea what this is?  I hate having things in there I can't identify ;)
>> 
>> --
>> Cheers,
>> Colin
> 
> 
> 
> Without checking the part outside on the car it sounds like you may have
> a Digital Idle Stabilizer. Is it inline with the electronic ignition
> module? Bentley says to remove it (just bypass really) from the circuit
> by hooking the male and female connectors together during idle
> adjustments.
> 
> This box is small, about two inches on two sides and perhaps an inch
> deep.  Sounds like that's not what you describe but check to be sure
> it's not conflicting.
> 
> Is the Jetronic box in the engine bay, the rain tray or inside the cabin
> under the dash?
> 
> TBerk
> 
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-- 
Cheers,
Colin

If you can read this line, you're probably not illiterate.