'87 5KCSTQ Hot Start and high idle problem apparently solved !

["Kurt Wesseling" <kwessel@enm.maine.edu>]

I don't quite understand why this is, but my hot start problem and
high intermittant idle (2000-3000rpm) seem to have both disappeared
with the installation of a new ISV relay temp sensor.  (Part #
below) I removed the sensor and checked it with an ohm meter.  Hot
or cold, the resistance was around 1.9Meg ohms.  Way too high
acccording to Scott Mo's webpage info.

http://www.teleport.com/~scottmo/ecusys.html#coolt

On my car, '87 5KCSTQ, the idle was running all the way to 2900 rpm 
at times.  I discovered that when I disconnected the wire to the ISV 
relay temp sensor the idle would settle down to around 1K.  I also 
had been having a hot start problem after the car sat for about 20 
minutes.  I earlier had replaced the plugs, plug wires, dist cap and 
rotor, but the high idle and hot start problem continued (but she 
sure ran better after that !)  Since I replaced the temp sensor, 
neither of those problems have re-occurred.

Picked up the sensor at my local dealer for $16.90.  
Part # 049 919 501

HTH,

--Kurt

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Kurt Wesseling
Technical Support Center
UNET (formerly ENM)
800-696-4357
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