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Changed Intake Manifold Gasket - Fast Idle Now 200 1985

posted by  stxavier2003 on  Sun Jun 26 11:09 CST 2005
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last visit: Sun Jun 17 14:01 CST 2007
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First of all, the car has a NA B230f with the original wiring harness. At least some of the rotten wires have been repaired, but ones inside the harness I do not know the condition of.

Today I changed the intake manifold gasket and the throttle body gasket trying to get rid of a rough idle caused by what I think is a vacuum leak somewhere.

Now that I have this finished, the car idles fast. The adjustment screw on the underside of the throttle body used to, when screwed all the way in, almost kill the car. Now, with the adjustment screw bottomed out, it wants to hover at about 900 rpm. Sometimes while driving I will stop (neutral or clutch in) and its sitting at about 750 rpm but usually its at 900. The A/C switch is turning off, that isn't causing it.

I cleaned the idle motor about 4 months ago (didn't disassemble, but cleaned the valve part).

I fear something inside the harness has shorted together causing. Anyone have any other things I should look at or a similar problem before? thanks much.





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