2008 MD90B not starting

[GregMD90B]

First try from winter storage, in Texas so not terribly cold but been 6months. I replaced Spark Plugs, getting fire. Rebuilt Rail, high pressure fuel pump 3-years ago. I’m suspecting fuel pump again? How can I test to see if it is working? After trying for a while, gas started coming out of bottom of air compressor filter hose connection, looks like a hose should be on the bottom of it, but none is there. Any help appreciated.

 

[pvanv]

Likely pressure regulator. If the fuel gets to the air pump, it will be expensive. Air and fuel rails have schrader valves to check pressures. The Tohatsu gauge set is pricey, but you can get static readings with a tire gauge.

 

[GregMD90B]

Thanks, I’ll check that later today. Will I need to be cranking the engine to get static pressure readings? Or just with key in on position?

 

[pvanv]

Seriously? Cranking is best.

 

[GregMD90B]

Sorry, I'm not a Technician, just an avid DIY'er, and electrician by trade. I appreciate any help, but will take it to qualified person if it appears to be over my head. lol

 

[GregMD90B]

I pulled the regulators, fuel regulator had a tear in one screen, air regulator had fuel in it, is this normal? I am going to take off the rail and go through the whole thing again. Thanks for your input.

 

[pvanv]

Replace the fuel regulator. no fuel should get into the air. ever.