>>Does it have an idle solenoid and is it working?
Yes it has one and is moving so I think it's working.
Reading different things I'm finding that if the powersteering/hydroboost isn't bled correctly it can cause this issue. Looks like it's a long process to bleed it correctly.
How to Bleed - Hydro Boost Systems Only
1 Do not start the engine until the system is fully bled.
2 Raise the front wheels off the ground.
3 Turn steering wheel fully to the left.
4 Fill fluid reservoir to “full cold” level. Leave cap off.
5 With an assistant checking the fluid level and condition, turn the steering wheel slowly and smoothly lock to lock until fluid level drops in pump reservoir. If fluid level has not dropped, no fluid has moved through the system. This normally indicates a large bubble in the reservoir or pump. Until this bubble passes, no fluid will circulate through the system.
— Do not turn the steering wheel fast as this will cause the fluid to overflow the reservoir. Trapped air may cause fluid to overflow. Thoroughly clean any spilled fluid to allow for leak check.
Check fluid constantly to ensure proper level and that no bubbles exist.
— If you see any signs of bubbles, recheck all connections then repeat the steps above.
— Fluid level should be steady (Rock Ram’s level will vary slightly).
6 Discharge the Hydro Boost brake unit by performing three full presses on the brake pedal.
— Watch power steering reservoir for any bubbling, foaming or burping.
7 Once foam clears, crank engine until it just catches and shut off.
8 Discharge Hydro Boost unit with three full presses of the brake pedal.
9 Repeat these steps until no air or foam is seen in the reservoir.
— If brake pedal feels soft, spongy or funny, system is not fully bled.