Idle Bad After Power Steering Rig Job

93 Grand Am, 6 cyl. 3.3
Power steering was poor at low RPM. Modified pump by enlarging hole in pressure fitting (50%). Now steering is GREAT but idle is effected. Idle
goes high then low, high then low. I want to keep the rig! Can I over ride idle problem?? Is it drag on the motor or some sensor?
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I think there is a sensor on the rack above it I think.. like the old days ...when you crank the wheel max it keeps idle up.. My corsica had it and it was located near the firewall above the rack.. I unplugged it.

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I meant while sitting still and not turning the wheel. It started immediately after I rigged it. That's why I'm confident it's the rig. According to the Hayes book, I have no sensor. I believe the rig is creating extra drag on the motor (as William said). The system senses it and compensates by increasing the RPM's. Almost immediately the drag decreases at the pump pressure goes high and the systems reduces RPM's. After 2 seconds it happens all over again. Can I adjust the sensitivity of the system or the Idle so it won't do this?? DB
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I used to do similar on models a couple of years older when they had "hard spots" during turning--drilling the opening would eliminate having to replace rack-and-pinion, which was quite expensive. BUT: I'm afraid you may have drilled too big. IIRC, I increased the opening like the next drill size on a coarsely-stepped set of bits. Also, I recall the pressure fitting was removeable, meaning you should be able to get one from either a core (store that sold a new/rebuilt pump) or from a salvage yard. Might be a good idea to plan on drilling it in "steps" so as to find the sweet spot. HTH, s
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I think you're right. I went bigger so as not to have to take it all apart again. Pretty sensitive stuff. Oh well. Thanks! DB
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