RE: [DML] Testing Lambda thermal switch
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RE: [DML] Testing Lambda thermal switch



Paul, I laid 3 lambda sensor on my bench and used a multimeter with a buzzer
continuity tester and the show open on all 3 and on resistance nothing
either. I haven't had time to put them in hot water.
John Hervey
www.specialtauto.com


-----Original Message-----
From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of
sweetp01569
Sent: Thursday, May 15, 2008 2:50 PM
To: dmcnews@xxxxxxxxxxxxxxx
Subject: [DML] Testing Lambda thermal switch

Using the MYDELOREAN.NET How-to guide #19, I get an open circuit 
between pin 7 and chassis ground for the test in step 3 with the 
engine cold, which indicates a failed switch or wiring. I get open 
circuit when the engine is warmed up, which is supposedly correct. How 
else can I test the thermal switch without removing the intake 
manifold and entering "the valley". I don't believe I have any weird 
idling symptoms, except for a little hesitation (like it wants to skip 
cylinders) when I press the gas when the engine is cold. Is this a 
possible symtom of a bad thermal switch?

Thanks,

Paul


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