[s-cars] possible ignition problem

[Kent McLean]

Adam Cramer wrote:
> I have the exact same problem. Occasionaly (33% of the time) the car seems 
> to hunt for the proper idle RPM. It won't do this when it's cold; only after 
> it's been driven for a while. I also have a hesitation under hard boost. 
>  I've checked/cleaned/replaced the ISV, IAT, plugs, air filter and POS. I've 
> also checked for air leaks and found nothing. My next test will be the 
> coils. 

O2 sensor(s)?  My guess is that when cold, the car is getting
a rich mixture. As it warms up, the O2 sensor starts misleading
the ECU to cause it to hunt at idle.

Have you pulled the diagnostic troubleshooting codes (DTC)?

--
Kent McLean
'94 100 S Avant, "Moody"
'89 200 TQ, "Bad Puppy" up in smoke