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Discussion Starter · #1 ·
:confused:93 Sedan Deville 4.9L stalling at lights, racing idle.
Pulled the codes as the service engine soon light came on.
They are: E27,E98,EE F48,F70,F85
Can someone help me decipher this? Thanks in advance for your help.

Mark
 

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Discussion Starter · #4 ·
Sounds stupid but what is the ISC How much and how hard to replce. I am mechanically inclined.
 

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2010 DTS
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88,474 Posts
ISC = Idle Speed Control motor. Located on the side of the TB. Simple R & R. Do a search for the adjustment procedure after installation.
 

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yea mine just raced and i would be driving at 45 mph and it would still go faster, talk about scary.... turned out to be the ISC. I would have to tap on the top of it for it to go back down. $125 and 30 minutes later (easily replaced) it was fixed
 
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