"« Paul »" <zxcv@[EMAIL PROTECTED]
> wrote in message
news:472D6514.E43954B3@[EMAIL PROTECTED]
> William H. Bowen wrote:
>>
>> "« Paul »" <zxcv@[EMAIL PROTECTED]
> wrote:
>>
>> >DB wrote:
>> >>
>> >> 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?
>> >
>> >The pwr steering won't affect idle.
>> >Do the usual: clean the maf, iac, throttle body, look for vac leaks,
>> >check the tps and O2 voltages.
>> >If that don't fix it, then remove the ****ft indicator and
>> >re-solder each solder connection on it.
>>
>> Paul,
>>
>> I STRONGLY disagree with your first statement - a changing load on
>> the engine will affect idle. By enlarging the pressure inlet DB has
>> increased the load of the PS pump on the engine.
>>
>> I will agree that he needs to verify all the regular stuff like
>> vacuum hoses etc. (did something get disconnected or damaged during
>> the work on the PS rack?) - the "up and down" idle sounds like a air
>> leak (IAC motor is fighting to control air flow and the higher the
>> engine load at idle the harder it is for the IAC to do that if you
>> have an air bypass around the IAC).
>>
>> It is also im****tant that the PS pressure switch be connected.
>> That switch senses PS pressure demand and triggers the ECM to increase
>> the idle power and cut off the A/C compressor. The switch is either
>> mounted into the PS rack valve body, mounted to a "T" in high
>> pressure line or mounted in the PS pump (been awhile since I've worked
>> on an "N" body with a 3.3 so I'm not sure where it is mounted in that
>> car).
>>
>> Regards,
>> Bill Bowen
>> Sacramento, CA
>
> I completely agree.
> However, I was assuming that he meant while sitting still and not
> moving the steering wheel.
> BTW, that car does not have a power steering pressure switch.
I did mean 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. Is
there a rack sensor??
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