Who Knows what this is?

[Eastcoast SHO]

Does anyone what this is? i found it unplugged and not sure what its for,its sitting behind the engine near the firewall, its kind of orange,
( sorry for the crappy pictures, cellphone)

:thankyou:

 

[93rev2sev]

Edit...if this was a V6, I'd say "Heater lock out switch". Now that I see it's a v8, I'm probably wrong but don't want to delete my post...maybe the A/C pressure switch...

Heater lockout...
When your eatc is on auto, and it cold outside, you expect heat from the vents...but when the engine is cold, nothing but cold air would come out. This little switch makes sure the water in the heater core is hot before kicking the blower motor on.

This can be observed by driving the car and turning up the temp on the eatc...the blower motor does not start right away. It comes on as soon as the engine warms up (more accurately...as soon as the coolant in that pipe is hot).

 

[SHOZ123]

Looks like the PS pressure switch.

 

[DaSho97]

Looks like the PS pressure switch.

Thats what I was thinking as well.

 

[Izzmo]

Hmm, sounds like that is probably what is causing all of your PROBLEMS!

 

[Eastcoast SHO]

what is a PS pressure switch? sorry im new to this v8 stuff if it was the v6 i would be ok dont know much about this engine

 

[93rev2sev]

I think the v8 has it's own version of VAPS. This might be the plug that translates to the V6 as the VAPS connector. We (us V6 guys) cannot see this plug very easily from the top.

 

[SHOZ123]

The pressure switch is a switch that senses pressure and that info is processed by the SARC module which then adjust the duty cycle of the ZF PS solenoid. Which would able another 2 wire plug on the rack too. But it is connected to the actuator and not easily seen.

 

[Eastcoast SHO]

the sarc are the stock shocks correct? i dont have stock on them when i bought the car it had kyb's in the front and tokicos in the rear

 

[Izzmo]

SARC (Semi-active ride control) struts are OEM.

 

[Eastcoast SHO]

SARC (Semi-active ride control) struts are OEM.

ok so its probably no big deal that its not plugged in since i do not have OEM struts in the car anymore

 

[Izzmo]

That could possibly be why it is unplugged. I'm not sure if that plug controls anything else though.

 

[NebraskaSHO]

Don't you want that plugged in even if you don't have the factory struts? Seems like it would be hard to turn at slow speeds.

 

[ruWelded]

SARC Controller

It looks like the power steering pressure switch. (on the high pressure line)

I think the SARC controller is involved with the power steering somehow. I would look for the wire and plug it in.

The 99's have a SARC controller, even with out SARC struts.

 

[venom]

It looks like the power steering pressure switch. (on the high pressure line)

I think the SARC controller is involved with the power steering somehow. I would look for the wire and plug it in.

The 99's have a SARC controller, even with out SARC struts.

There are two power steering connectors. One senses pressure in the rack and allows the PCM to trim in extra idle to keep the car from stalling. Quickly snap the wheel against the lock while idling. If the engine stalls then you likely have that switch unplugged. The other is to allow the Variable assist to do it's magic, and as I understand it is not a switch but a solenoid to allow higher or lower steering effort.

Both connectors are similar in shape and style (2 pin rectangular), I don't know which is which without looking at the wire colors and the elec prints however....

 

[Eastcoast SHO]

well i guess i will leave it plugged in, i guess it cant hurt anything if it is not doing anything right?

 

[SHOZ123]

But it is doing something. The SARC controller also controls the VAPS. The PS pressure switch provides feedback to the controller and then it adjust the voltage to the ZF solenoid.

 

[Stan Phillips]

Sorry for replying to an old post, but the only one I could find on the power steering pressure switch.
I have been leaking power steering fluid for a couple weeks now, finally had time to diagnose what the issue is.
Been filling it with ATF...which calms everything down....but still leaking.
It seems to be leaking out of the top of the PSP valve. When I unplug the sensor & wipe everything clean, & start the car....it "weeps" out of the top off the sensor. It looks like this sensor is available to purchase...anyone else have this issue ??
I would rather replace just the sensor than the entire rack.....any thoughts would be appreciated.