Have boost gauge, stopped boosting suddenly a few monthes ago. Friend told me he was going to give me the solenoid I needed off his parts truck but after 2 monthes I just bought a new one swapped it in and still no boost. Intermittent CEL 195k miles 1995 with EGR K&N filter, lots of black smoke when I put my foot down.

 

Have you checked cross over pipe these tend to colapse on the inside if a golf ball will not pass thru it replace it

 

Hook up a vac gauge and test for vacuum from the vac pump,wastegate solenoid and wastegate actuator.
Sometimes a shot of WD40 in the wastegate solenoid vac ports will lube the internal ball and revive a bad solenoid.

Minimum readings would be 24"+ from the pump and 18"+ at the wastegate actuator.

Also remove the vac line from the actuator with the engine off,pull the wastegate rod in and cover the vac port with a finger and release the rod-if the lever stays put the actuator is good-if it moves while your finger covers the port the actuator is toast.

 

mine did the same thing the other day, its was the vac pump that crapped out.

 

I may be wrong but a diy turbo master should correct that, and it'd be more adjustable if your interested in squeezing a bit more power out of your rig. Just watch exhaust gas temps.

 

Most folks who do the diy turbomaster complain of higher fuel consumption since the ECM no longer has the ability to control boost it must step up feul delivery to match boost.

The vac system is actually a real good system if maintained and more versatile than the turbomaster DIY or bought from Heath Diesel.

If a turbo master is used keep the vac solenoid plugged in and do not allow more than 10psi of boost to avoid coding/limp mode.
Or get an aftermarket tune that allows more boost and does not require the solenoid to stay connected.

 

Turned out to be a broken vacuum line and the boost solenoid thanks!

 

Good work getting to the bottom of it.

 

Thanks to you ^

 

Hey guys,so ive read all the posts and im having the same problems as Levis95 but i have not ideal where the boost solenoid is and ive checked the vacuum lines. It builds 1-3 pounds of boost but not the 9-12 i was getting.. Please help!