0 boost until 2000 rpm

nlewman · Apr 3, 2018

Did some googling, can find some threads that relate but none exactly. My truck won't build any boost at all until after 2000 rpm. I know it's not a fueling problem because with my ts6 on anything but stock, it hazes pretty bad until 2000 rpm. Cant get past about 14 psi on any tune, and I just can't get out of my own way. Any idea? Don't see any soot on the fire wall behind the up pipes. Has a very slight lope at idle sometimes, so slight I can't get it on video.

97 f350 cclbd
4.56 rear end
6637 Intake
3 inch downpipe 4 inch straight
Ts6 with canned tunes
Torque pro reader
Boost and egt gauges.

Sent from my SM-G955U using Tapatalk

Magnum PD · Apr 3, 2018

You checked for boost leaks?

nlewman · Apr 3, 2018

I have checked for boost leaks, but when I did it a while ago I neglected to block off the ccv, and I got a pretty huge leak out from under my valve cover.

I did have some leaks around the plenum boots, which I have remedied with some new boots from riff raff, put on with some hairspray.

Sent from my SM-G955U using Tapatalk

gnxtc2 · Apr 6, 2018

I would plumb a mechanical boost gauge in before I go any further.

Billy T.
[email protected]

nlewman · Apr 6, 2018

gnxtc2 said:
I would plumb a mechanical boost gauge in before I go any further.

Billy T.
[email protected]

I have a mechanical boost gauge and a dedicated egt, those are in addition to torque pro.

Sent from my SM-G955U using Tapatalk

gnxtc2 · Apr 6, 2018

Check the turbo wheel? How are the EGTs down low? Hear a "woosh" sound? Maybe EBPV is frozen closed. Remove air filter and see if you get boost.

Billy T.
[email protected]

nlewman · Apr 6, 2018

I know what the ebpv sounds like, it's not that. At least it doesn't sound like it. My egts are always pretty low. I've never had a problem with them, don't think I've ever seen my gauge go over 1100. I attribute that to my 4.56s.ill try the air filter.

Sent from my SM-G955U using Tapatalk

nlewman · Apr 6, 2018

Here's my wheel

Sent from my SM-G955U using Tapatalk

rrchlin · Apr 14, 2018

I was reading about CPS sensors earlier and the timing. Apparently not all CPS will just shut ur truck down. Maybe your CPS is wayyy retarding your timing.

Anybody know if that's possible?
My trucks only hitting about 20PSI but takes til like 70 to do that. Hoping new injectors fix that. I did do new manifolds and uppipes and got it from 9-10 psi to 20psi. Not sure if I'm still leaking or not. Checking for soot is kind of hard.