Thread: Low gear boost issue.

So I'm having a problem with my de+t g20. In first and second gear my boost seems to fall from 9-10psi to about 6-7psi, and I can't figure out why. In third and up it holds about 10psi all the way. I've checked all my piping and double clamped all my couplers I thought may have any issues and found and fixed a small vacuum leak and still did not change. I am at a loss now I've tried looking all over the net and a lot of people say its normal, but I had a Sr 240 before and it held boost in all gears.
Thanks in advance for any help.

Bump. My main question is if this is common with these cars.

Where are you getting your wg source?

Right now its from the bigger nipple on the manifold where the canister used to hook up. It was on a tb port and there was no difference.

Here's a video if it helps at all.

My car does the same. I believe it has to do with engine load. There isn't much load on the engine in 1st or 2nd, but a bigger load in 3rd-5th which helps the turbo build boost.

That's what I've read but my other turbo car didn't do it and they were both t25 Sr just one was rwd

You tested bov? Might be leaking.any broken hose clamps? How much boost are you running?I've had a similar problem and it was leaks.whar is your vacuum on idle?

Can you post a pic of the engine bay? Pressure test the system to check for leaks.

No bov right now, I haven't tested it cause I don't have a compressor. All couplers are good too. I figured if it was leaks it would do it in all gears, and I am trying to run 10 psi. Vacuum at idle is where it should be as well.