Quote:
Originally Posted by rhandwor
...The control on the right has a lot of vacuum tubes make sure you have vacuum and it switches.
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I would have thought that by 2000 they would have at least changed the control to transistors, if not monolithic or thick film devices. I thought only the Russians and Hungarians were still using vacuum tubes.
As for the hunting idle RPM, surging and stalling, it could be time to clean the throttle body, idle air control passages, and remove the idle air control to disassemble, clean, and lubricate it. I JUST went through this on an '05 with the same kind of symptoms, and that's all I did to rectify it. It hasn't been quite as cool here as in Eau Claire, but as soon as it hit about -10°F the symptoms began. There was just enough varnish buildup on the IAC stem to make it sluggish to the point where the PCM was trying to "chase" the idle RPM with air adjustment but the IAC couldn't react quickly enough. It would hunt from OVER 2,000 RPM to stalling, even in neutral. Once the IAC was cleaned/lubed/reinstalled it immediately went back to normal (No, not Normal, Illinois, only Rockford).
This may be of some help:
http://www.automotiveforums.com/vbul...67&postcount=7