1ofakind79
New member
This started this fall and I've been trouble shooting and testing parts for months with no progress. Truck is a 2000 F350 7.3 6spd dually.
Current mods are:
250/200
studs
push rods
valve springs
stealth hpop
php tunes
swamps idm
airdog 150
regulated return
south bend dd
intake
5" straight exhaust
As you drive down the road it starts to build boost once it gets to 23lbs if driving gently it will drop off to nothing almost instantly. If you drive and shift hard it will only build around 15lbs before nothing. When I say nothing there is a loud woosh and the gauge drops to 0 and it starts smoking like a chimney. Then I shift and its all back to normal until I get to the same boost range. Over the time this has been going on I've installed new IH bellowed up pipes, push rods, and valve springs, a new 38r, new riffraff boots, ICP sensors. I've also swapped intercoolers, map sensors, computers, tuners,injectors, hpop, tried eliminating my boost fouler. This was going on with both stock injectors and my large 250/200s. my old 38r had many miles, I tried bolting the waste gate shut and got no change, tried a stock turbo and it seemed good for a couple days then back to loosing boost as if a waste gate opened or boot came off. Now I have a brand new 38r and no change. Are there any sensors I should test To see what is going on? I have an AE but I'm totally out of ideas and places to look at this point. Its definitely not defueling, no check engine lights.
Current mods are:
250/200
studs
push rods
valve springs
stealth hpop
php tunes
swamps idm
airdog 150
regulated return
south bend dd
intake
5" straight exhaust
As you drive down the road it starts to build boost once it gets to 23lbs if driving gently it will drop off to nothing almost instantly. If you drive and shift hard it will only build around 15lbs before nothing. When I say nothing there is a loud woosh and the gauge drops to 0 and it starts smoking like a chimney. Then I shift and its all back to normal until I get to the same boost range. Over the time this has been going on I've installed new IH bellowed up pipes, push rods, and valve springs, a new 38r, new riffraff boots, ICP sensors. I've also swapped intercoolers, map sensors, computers, tuners,injectors, hpop, tried eliminating my boost fouler. This was going on with both stock injectors and my large 250/200s. my old 38r had many miles, I tried bolting the waste gate shut and got no change, tried a stock turbo and it seemed good for a couple days then back to loosing boost as if a waste gate opened or boot came off. Now I have a brand new 38r and no change. Are there any sensors I should test To see what is going on? I have an AE but I'm totally out of ideas and places to look at this point. Its definitely not defueling, no check engine lights.