Hey Guys, new to the forum thanks in advance for your help. I’ve got an 01 F350 7.3. I’ve been doing some modifications on for about a year. S&B intake, 5” MBRP exhaust, TS Chip, TS informant Riff Raff intercooler boots. I did not buy this truck to race just pull a heavy boat and wanted max mpg and performance. I’m seeing a hesitation in throttle response from a stop and boost on the INFORMANT 6 will max around 13psi. Truck runs and cranks ok but when starting from a stop seems to be a delay in acceleration. I’ve also got a little bit of turbo fart just before going into overdrive in certain conditions. Ever since installing S&B I’ve been hearing whooshing whenever truck shifts, I figured it was normal and I was hearing the turbo spooling down. But I hear the fart or intermittent sound when accelerating under load sometimes.
I’ve checked for leaks and replaced intercooler boots 6000miles ago, they are still clean.

Cleaned EPB tube and sensor, unplugged sensor and ran No difference.

Checked hoses red green and Map Sensor hose.

Checked voltage at Map Sensor with switch on. Read 1.5 volts.

Codes I’ve seen are P0238, P1248, and P1211.

Questions

Do I need a Map Sensor Block with the TS chip Informant, is that why I’m only seeing 13psi through the OBDI port?

Is it possible the wastegate could be a problem?

Could the map sensor be bad even though it’s reading 1.5 volts with switch on engine off?

How concerned should I be with the turbo fart happening every now and then?

What could be the cause of the delayed throttle response?

Thanks in advance for all your Help.

Can anybody see the above post? I’m new to the site didn’t know if I was missing something. Thanks

I will recheck for leaks again. I’m pretty sure I’m starting to hear more hissing when accelerating than before. But it sounds like it’s coming from the back of the turbo. What I’m calling a turbo fart is when it sounds sorta like sharp quick bursts of air escaping when accelerating. It’s gradually getting more frequent. I pulled boat today with good hills, Boost stopped every time at 13 psi. Thanks for advice

i have a boost detector, and checked everything again tonight, boots, up pipes hose from MAP to turbo etc. No leaks everything still clean after replacing boots 6500 miles ago. Turbo wheellooks and feels perfect on intake side. I previously cleaned EBP tube and sensor. On cold mornings it seems to work as it should by sound until engine is warm then jet sound goes away.
I’m starting to consider the MAP sensor, even though the voltage was correct at 1.5v with switch on engine off.
I’m running an TS chip with an Informant 6, Boost dead heads at 13psi from 50 horse tune to 140hp tune.
On stock truck feels really weak pulling boat, makes very little boost Maybe 8 psi. Throttle response from stop is slow regardless of stock or hot tune.
i really think the EBP is functioning as it should but is there a way to check and make sure? What will unplugging it do?
Any help appreciated This thing is whooping me!!

Codes are coming from 50 and 75hp tunes. I know this because I only used 100 and 140hp tunes for testing problem then cleared the codes after. I don’t race but I can definitely say the 140hp tune was a lot faster than any other.
There is definitely a problem regardless of tune. I’ve driven two other trucks with exact same setup down to same guage and exhaust. Both of them feel a lot better with throttle response and building close to 20lbs of boost stock on Informant 6.

Whats the best way to check for leaks there? And on the up pipes?
Maybe I’m missing them.
Im going to disconnect waste gate and try to wire shut and see if it makes a difference.
Also is there a way to check EBP sensor without buying a new one? Seems to work when cold then back to normal but I want to be sure?
My Dad is an old school diesel mechanic that doesn’t know a lot about modern setups, but he keeps saying since it works some as rpms go up it could have something to do with VGT in the turbo or wastegate stuck open. Truck did sit four about 4 months before I bought Completely out of fuel.
Thanks everyone for your help.

I went over up pipes and manifolds No soot whatsoever Looks perfect. I took actuator off wastegate, it was

I went over up pipes and manifolds No soot whatsoever Looks perfect. I took actuator off wastegate, it was closed but swings freely. I removed red hose from the actuator for the wastegate put the arm back on the wastegate.
I took the truck for a test drive.
Same results as before on the 75hp tune Max Boost was 14psi Got some turbo bark when in throttle during acceleration. Boost readings are from the TC Informant 6 which reads through the OBDI

Kicker is I put the truck on stock and the Informant 6 read 21psi of Boost but truck still felt weak.

Why would I get more boost from stock? Truck has a lot more power with 75hp tune but only builds 13 or 14psi.

Also I noticed a lot of grease or or oil on the EBP rod under the exhaust side of the turbo. Pedestal leak? Is that normal?
Thanks again for any help.