Thread: Low boost issue not related to BBv help please

Is it possible that your boost gauge is broken? That seems like a very odd reading.

Does it feel like its lacking? When I went on first drive with mine the solenoid was limiting me to 3 lbs, and I could definitely tell. Does the bbv move when you throttle it by hand?

Originally Posted by Smikey

It doesn't feel at all how it felt before but that's on the butt dunno. And yes the actuator moves when the car is reved. the plunger rests on th intake manifold while the car is off. The plunger is fully inserted at idle and when I rev it drops instantly about half of its full travel distance but comes right back up.

"The plunger is fully inserted"... My mind=gutter.

But yeah, dunno man. Maybe belt is slipping? Just bypass it closed so you are in boost all the time and test it? Never tried but it should work. Least you'll eliminate the BBV.

Are you scanning? Running a 2 bar map? Do you have a manual boost guage you could use to test?

This is what it has

Yeah that's a 1 bar map. I could be mistaken here, but the aeroforce reads off the PCM, and the PCM uses the MAP sensor to read boost, if you hook a mechanical boost guage up I bet you'll see a lot more.

EDIT: Or, get a 2 bar map, and make the necessary pcm changes, and it'll show on the AF.

I do have one of these



i will install later today, but the car does have a custom dyno tune, could it be a running issue or computer issue?

Also purchasing a mechanical boost gauge today

Thank you again for everybody that's helping me this far

You can't just install the 2 bar, you have to go into your map folder and change the max kpa so the pcm will read the higher values.

Edit: stick it on and see what happens actually, the pcm might be set up for the 2 bar, you'll know if it is or not when you compare the mechanical guage readings to what the AF says.