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.
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