Throttle plate isn't closing all the way, idle speed control valve is wide open, or you've got a vacuum leak somewhere...
1: Listen for hissing of a vacuum leak.
2: Listen for actuation of the ISCV after shut-down (click-click-click-click)
3: Look for any indication that the throttle plate isn't closing against the screw-stop.
If the PCM offers no hints, the best place to begin looking for problems is with the Idle Air Control Valve/Bypass Air Control. You can try cleaning it and see if that improves your idle speed. A throttle body cleaning is likely to cure the high idle speed as well
Multiple places to look.
Old mechanics looked for vacuum leaks with a propane torch. Attach hose to the end(NO NOZZLE) and tape a LONG screwdriver to most of that hose and go fishing.
When you hear the engine speed up, you found a vacuum leak.
The cooling fan may cause trouble with the wind it causes.
I figure some of you guys are really into computer and network tech and maybe some of you have done this before What should I do to get my home Wi-Fi signal to reach into my metal shop building in the back yard? I have AT&T U-verse wi-fi router in a closet in the center of the house. I can...
The wire wheel is good at removing rust and aggressively removing weld splatter. I have wire wheels for my drill motors. For a more gentile surface finish, bolt on a 3M Scotch-Brite wheel. It's REALLY good and cleaning and polishing metal of all types. My bench grinder has 1/2 " shaft.
Our super old Millermatic we keep in the shed (not enclosed or climate controlled) bit it today, most likely a control board issue, so we're looking to replace the welder.
I've actually heard decent things about Everlast, which is surpising to me, so we're looking at a Millermatic 211 or an...
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