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Possible causes are...
Posted by Street (more from Street) on Wed, 29 Jun 2005 13:29:31
In Reply to: Rough idle and T/B stop adj., Tom, Wed, 29 Jun 2005 11:37:13
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First, check the condition of the plugs. Sounds like they may be fouling at low RPM. As far as your TB adjustment goes, that depends on which FI system you have and I believe '93 has a few variants. Depending on which Throttle Position Sensor (TPS) or TP Switch your car has determines what steps to take. Normally, the TB is usually practically closed (I forget which size feeler gauge is used to adjust the earlier types) and if your car has an AIC, then it's safe to assume it's "closed" in the idle position. Anyway, need more info about your car but you can try some things like scouring the TB with a toothbrush and some carb cleaner. I wouldn't recommend adjusting the stop just yet.
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