Comfort Systems USA, Inc., a Delaware corporation, was established in 1997. We provide comprehensive mechanical contracting services, which principally includes heating, ventilation and air conditioning ("HVAC"), plumbing, piping and controls, as well as offsite construction, electrical, monitoring and fire protection. We install, maintain, repair and replace products and systems throughout our 36 operating units with 115 locations in 102 cities throughout the United States. We operate primarily in the commercial, industrial and institutional HVAC markets and perform most of our services in industrial, healthcare, education, office, technology, retail and government facilities. Approximately 99% of our consolidated 2017 revenue was derived from commercial, industrial and institutional customers and multifamily residential projects. ... More ...
You may want to pick up a cheap vacuum test kit to see if there is sufficient vacuum at the turbo. Check all pipes for leaks.
The solenoids will only get voltage when the ECU wants a vacuum (or not, don’t know which way it goes).
On startup, my EGR vacuum was “sucked” then eased off after a few seconds (10-20)
On startup/idle, my turbo vacuum was sucked and stayed sucking till the van wanted to change its position.
So, on my van, after say 20 seconds, as EGR vacuum request is “off” and Turbo vacuum request was “on”, I’d expect different voltages at the solenoid as they are doing opposite things. Its all from the ECU. Easier to test with vacuum kit.