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High idle after oil breather box replacement 200

posted by  someone claiming to be Texmark on  Sat May 12 16:01 CST 2007 [RELATED]

Before replacing the oil breather box, my idle was a good steady 900-1000 rpm. After replacement it idles at 1300 rpm. If I’m in Drive with my foot on the brake it comes down to 1000. During the replacement I cleaned the throttle body and idle air controller with carb cleaner. Other than that I did nothing that would have any effect on the idle (that I know of).

I replaced the breather box because of oil leaking out the filler cap and probably other places too. Now I don’t have the oil leaks, so I’m wondering if since the system is breathing so much better now that it has caused the idle to rise. I know there is a screw on the front of the throttle body that I can adjust the idle with, and I would then need to adjust the electrical switch on the back of the throttle body. Do I need to adjust this? It doesn’t seem right to me.

Any thoughts would be appreciated. Thanks
Mark
’89 240, 175K





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