Don't forget to check the throttle valve switch.

Todd
'88 Westy

John Rodgers wrote:

> If you change out the ISV or the ISCU, be sure you set the idle speed
> before hooking it all back up. Just warm the engine, disconnect the idle
> stabilizer valve (ISV) and adjust the big slotted screw near the contol
> on the air intake system until the rpm reads 850-900 rpm. Then shut it
> off, and reconnect the ISV. Let the engine get cold, then restart. The
> ISV should hum(vibrate) and the rpm should read just slightly above 1000
> rpm until the eninge warms up. At that point the ISV is cut out of the
> circuit.  Once the engine is warm, turn on the AC. The engine rpm should
> increase when the ISV kicks in to keep the engine from stalling under
> the AC load. Turn off the AC, and then turn the steering to the stops
> each way. The power steering switch should kick the Idle Satbilizer
> system on and boost the RPM to prevent the PS pump from overloading the
> engine and stalling it out.
>
> Good Luck.
>
> John Rodgers
> 88 GL driver
>
> Richard Golen wrote:
>
>> Hi,
>>
>> Just when I think I've solved the bad idle problem in my 87, it
>> developed a
>> new behavior. I swapped out the idle stabilizer with my wife's 90
>> cabriolet. The rough idle/rich mixture problem at start up seemed to go
>> away. But then after a day or so, it would idle at 2000 and stay
>> there. I
>> shut off the key and quickly turn it back on and the idle would drop to
>> normal, but eventually get back to 2000.
>>
>> So I out the original idle stabilizer back in the 87...but before doing
>> that I cleaned it with carb cleaner as suggested by someone on the list.
>> The 87 ran ok for a few minutes then after I drove it around the block a
>> couple of times, the idle went back to 2000.
>>
>> I've noticed that the stabilizer constantly "hums". Is it supposed to
>> shut
>> off after a while?? I disconnected the stabilizer and opened up the air
>> bleed screw on the throttle body, and it seems to idle ok now.
>>
>> This is getting frustrating!!
>>
>> I also cleaned the ground connections for the oxy sensor in hopes that
>> would help....
>>
>>
>> TIA
>>
>>
>> Ric
>>
>