I have a sullair 375 compressor and it will not idle. it goes right to operating speed upon starting. I've changed the speed control pressure switch ,didn't help. any clues?

Hi,

Please attempt to disengage the clutch of the compressor while simultaneously lowering the engine speed.

If this doesn't work, please call Suilar at 1-219-879-5451.

Thank you.

The Shop tech have a option for a high pressure package. (It is just a pulley and thermal valve change) But when you raise the psi you lose some cfm. Contact your sullair dealer.

would say dust has done something to do with it
before you had time to move it

will need the compressor serviced

first ..in simple words
to replace the compressor pressure shut off /turn on valve
that should fix the pressure trip build up limit problem

and maybe a partial strip down to clean out the casing
if dust build up is noted

if your saying it wont recover from idle down mode back to full speed , this might be the IR fuel pump/regulator problem (a pressure gauge will need to be added to verify this ) , if so save your money go with an aftermarket pump it'll last longer

On a 375 h s#201202020049 change the element in the compressor crank and run for 10 minutes good are and then shuts off and it won't crank back turns over but won't start

Your A/C is low on freon when you are A/C mode the compressor goes on and off with the low pressure switch. Auto parts stores carry recharge kits for most all cars/trucks. follow instructions on can for charging

I would check the IAC motor or idle air control motor, heres a little info.about the part.Stratus Sedan, 1999-2005 Idle Air Control Motor

• DESCRIPTION & OPERATION
• REMOVAL & INSTALLATION

Print

Description & Operation

Not for Dodge Stratus Sedan
The idle air control motor (IAC) attaches to the throttle body. It is an electric stepper motor. The PCM adjusts engine idle speed through the idle air control motor to compensate for engine load, coolant temperature or barometric pressure changes. The throttle body has an air bypass passage that provides air for the engine during closed throttle idle. The idle air control motor pintle protrudes into the air bypass passage and regulates airflow through it.
The PCM adjusts engine idle speed by moving the IAC motor pintle in and out of the bypass passage. The adjustments are based on inputs the PCM receives. The inputs are from the throttle position sensor, crankshaft position sensor, coolant temperature sensor, MAP sensor, vehicle speed sensor and various switch operations (brake, park/neutral, air conditioning).

Fig.

Not for Dodge Stratus Sedan
When engine rpm is above idle speed, the IAC is used for the following functions:


Off-idle dashpot Deceleration air flow control A/C compressor load control (also opens the passage slightly before the compressor is engaged so that the engine rpm does not dip down when the compressor engages)
The idle air control motor (IAC) attaches to the throttle body. It is an electric stepper motor. The PCM adjusts engine idle speed through the idle air control motor to compensate for engine load, coolant temperature or barometric pressure changes. The throttle body has an air bypass passage that provides air for the engine during closed throttle idle. The idle air control motor pintle protrudes into the air bypass passage and regulates airflow through it.
The PCM adjusts engine idle speed by moving the IAC motor pintle in and out of the bypass passage. The adjustments are based on inputs the PCM receives. The inputs are from the throttle position sensor, crankshaft position sensor, coolant temperature sensor, MAP sensor, vehicle speed sensor and various switch operations (brake, park/neutral, air conditioning).

Fig.

When engine rpm is above idle speed, the IAC is used for the following functions:


Off-idle dashpot Deceleration air flow control A/C compressor load control (also opens the passage slightly before the compressor is engaged so that the engine rpm does not dip down when the compressor engages)
Target Idle
Target idle is determined by the following inputs:


Gear position ECT Sensor Battery voltage Ambient/Battery Temperature Sensor VSS TPS MAP Sensor
Target idle is determined by the following inputs:


Gear position ECT Sensor Battery voltage Ambient/Battery Temperature Sensor VSS TPS MAP Sensor

Removal & Installation

1. Disconnect the negative battery cable.
2. Disconnect the IAC electrical connector.
3. Remove the IAC mounting screws.
4. Remove the IAC.

To Install:

1. Install the IAC to the throttle body.
2. Tighten mounting screws to 5.1 Nm (45 inch lbs.) torque.
3. Attach electrical connector to the IAC.
4. Connect the negative battery cable.
   
   

   Fig.
   

1. Disconnect the negative battery cable.
2. Disconnect the IAC electrical connector.
3. Remove the IAC mounting screws.
4. Remove the IAC.

To Install:

1. Install the IAC to the throttle body.
2. Tighten mounting screws to 5.1 Nm (45 inch lbs.) torque.
3. Attach electrical connector to the IAC.
4. Connect the negative battery cable.

The sullair 185 has a low oil pressure override button that you have to hold in while starting. after the oil pressure builds up(takes about ten seconds) you can release the button and the machine should continue to run.

I have a sullair 375 and i keep getting two fault codes that keep popping up one is a 611 which says it has something to do with the injector ground and the other says that my emergency switch is on and it is not. iv'e looked over it multiple times and i can find anything wrong with it any help would be greatly appreciated.

I think your cooling fan (elecric) isn't working when the a/c is on. If so, The a/c pressure climbs very high and pops open the emergency pressure release to save the system from damage.

Check your cooling fan and relays, or ect, engine collant temp sensor.

You may have to add freon too.

-----------
A/C Pressure Cutoff Switch

The A/C pressure cutoff switch is used to interrupt A/C compressor operation in the event of high system discharge pressures.

• The A/C pressure cutoff switch is mounted on a Schrader valve-type fitting on the A/C compressor to condenser discharge line.
• It is not necessary to discharge the refrigerant system to remove the A/C pressure cutoff switch.
• A valve depressor, located inside the threaded end of the A/C pressure cutoff switch, presses on the Schrader valve stem.
• This allows the A/C pressure cutoff switch to monitor the compressor discharge pressure.
• When the compressor discharge pressure rises, the switch contacts open, disengaging the A/C compressor. When the pressure drops, the contacts close to allow operation of the A/C compressor. For specifications regarding operating pressure(s), refer to Section 412-00 .

The switch contains a second set of electrical contacts used for high-speed cooling fan control.

• When the compressor discharge pressure rises, the contacts close and engage the high-speed fan control. When the pressure drops, the contacts open and the high speed fan control is disengaged. For additional information, refer to Section 303-03 .