Code 564 Fan Control (FC) CKT Fault

94-95 models are as bad as 97's for bad eec's. Does it high idle if you unplug the iac?
 
I don't think the 3.8 PCMs get the injector hanging issue the 4.6 PCMs are known for. Is there something else they get a bad rap for doing? 🤔
 
I do agree about this car should not go into such a high idle. The Town Car does not and it has a 95 4.6 in it. It has done this ever since I can recall and over the last few years I have replaced the IAC, TPS and MAF to no avail (for other reasons than high idle). The idle was worse a year ago before I switched out my TPS
Grog6 said:
94-95 models are as bad as 97's for bad eec's. Does it high idle if you unplug the iac?
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I can give it a try!
 
I went out just now while the engine was cold and pulled the IAC. The car would not start. I plugged it back in and it started at about 1600 rpm and in less than a minute worked its way down to around 600 rpm.

"it's fine...."
 
You might try cleaning the throttle butterfly; the back side gets dirty from egr. Throttle body cleaner, like you use to clean the maf. It'll be black, and wipe where it seats.
 
Zep5.0 said:
I'm just down away by the damage in there. I can't wrap my head around it. Something must have worked the "rotor" loose and when it went, shit happened. 🤷🏼‍♂️
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I had the hard plastic piece on a set of points break once while at cruise speed and coasted to a stop wondering wth? Took a while to figure it out.
 
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