Stop in for a cup of coffee

The ones with no schrader valve have pressure transducers. Need a scantool to read pressure.
Many times the dpfe/egr feedback sensor goes bad, and kills the 5 volt reference signal. Unplug it and see iffn it runs.
Its got 2 rubber hoses that connect to steel lines off the exhaust on driver’s side.
Another is maf sensor, screws with fuel mixture.