DB wrote:
>
> "« Paul »" <zxcv@[EMAIL PROTECTED]
> wrote in message
> news:472E0254.1AAF4A90@[EMAIL PROTECTED]
> > DB wrote:
> >>
> >> "« 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??
> >
> > See above.
> > I don't see why the pressure would change enough to affect
> > the idle without turning the wheel. It is just sitting there.
> > About the only way to make sure is to undo the belt.
>
> 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
My same car does not have a pressure sensor.
Let us know if you find one. You will have to do more
diagnosis.
I can't help any further. Sorry.
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