Georgia Fiero Club Forum

All Things Fiero => General Fiero Discussion => Topic started by: GTRS Fiero on November 26, 2019, 09:06:17 pm

Title: Power Steering cut-off switch
Post by: GTRS Fiero on November 26, 2019, 09:06:17 pm

Does your Fiero have the switch to turn off your AC compressor during moments of high power steering load?  This is probably only an '88 Fiero thing.

Title: Re: Power Steering cut-off switch
Post by: Fierofool on November 26, 2019, 09:35:40 pm

I've never heard of such a switch.  Give us some information and where you heard about it. 

Title: Re: Power Steering cut-off switch
Post by: GTRS Fiero on November 26, 2019, 09:40:33 pm

Well, I was reading the FSM...and there it was.  It went on to state that this functionality was built into the ECM, on some vehicles.

Title: Re: Power Steering cut-off switch
Post by: Fierofool on November 26, 2019, 09:43:07 pm

It would probably be the 88 only since that was the year EPS was to be introduced. 

Title: Re: Power Steering cut-off switch
Post by: GTRS Fiero on November 28, 2019, 04:35:58 pm

Is the AC cutoff in the ECU?

Title: Re: Power Steering cut-off switch
Post by: Fierofool on November 28, 2019, 04:55:26 pm

I don't know.  I'm guessing the ECU has knowledge in some way as to the AC because I've frequently seen ECU's listed as being for a car with AC or Cruise.  I don't know how the ECU would get its information, though. 

Title: Re: Power Steering cut-off switch
Post by: GTRS Fiero on November 28, 2019, 04:57:04 pm

I think the info only flows from the ECU.

Title: Re: Power Steering cut-off switch
Post by: Raydar on November 28, 2019, 06:48:37 pm

In other cars, the power steering provides an input to the ECM when the wheel is turned off center. It's to maintain engine speed when the load (in this case, the PS pump) is increased. Never noticed that in my FSM, but it doesn't surprise me.

Title: Re: Power Steering cut-off switch
Post by: GTRS Fiero on November 28, 2019, 07:16:16 pm

So, not in the Fiero?

I wonder if the '88 Duke has a bunch of options the '88 V6 does not have.