[Es2] still looking for unstable idle problem

Steve Eiche seiche at shadetreesoftware.com
Sat Sep 17 13:40:23 EDT 2005

Yes, another good place to look.  If you have a multi-meter, the voltage 
on the O2 sensor should vary from 0 to 1V pretty rapidly, like twice per 
second.  If it is stuck at 0V or moves slowly, like 1 or 2 seconds to go 
from 0 to 1v and back, the O2 is worn out.  If it is stuck at 1V, look 
for intake leaks first.


Ben Klumper wrote:

>This sounds very much like your O2 sensor is shot. Like Steve said, I would 
>start by checking the fault codes.
>----- Original Message ----- 
>Elijah wrote
>>When I start the car it runs fine until it gets warm then the idle starts 
>>to go up and down, the warmer it gets the more drastic this becomes and it 
>>acts like it will stall. I have change the MAFand ISV and cannot figure 
>>out what could be causing this? Anyone have any idea's? I thought maybe a 
>>vacuum leak but it seems like I would see that on my boost gauge and it 
>>would do it cold as well. Any help greatly appreciated as always.

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