"« 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
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