95 low boost issues
Thread Starter
|
5th Wheeling
Joined: Aug 2014
Posts: 40
Likes: 0
95 low boost issues
I have a 95 regular cab dually, 5-speed, 4.10 gear, 207k miles...have had the truck about 15 years or so...ran/pulled great the first 5 years we had it, developed a oil leak atad theaybe turbo pedestal, which my dad replaced...been weak every since...always thought it was low/no boost...just installed a boost gauge and verified my assumption...will push about 8 pds in 3rd-4th gear if you run it up to 3-3.2k before shifting...normal driving 5th gear 55-60 it shows 1-2 pds of boost, maybe 3 if you hit a hill and try to maintain...my dad rechecked the spring tension on the pedestal/turbo? several times and it was on what the service manual recommended. Any ideas as to the issue?
Thanks,
Brian
Thanks,
Brian
Laughing Gas
Joined: Oct 2019
Posts: 949
Likes: 109
From: Fowler Colorado
sounds like this. Check the 2 boots coming off the Y pipe too. If they’re the original orange ones replace them with Riffraffs. Probably have leaking up pipes too. Most do
Thread Starter
|
5th Wheeling
Joined: Aug 2014
Posts: 40
Likes: 0
O-ring on the spider? That the turbo pedestal? Sorry, I'm a gas engine guy by trade...yes, the boots are the original orange ones...it also sounds to have a small exhaust leak somewhere. I'm wanting to do some mods to it, but have to get the liw boost issue resolved first.
Laughing Gas
Joined: Oct 2019
Posts: 949
Likes: 109
From: Fowler Colorado
O-ring on the spider? That the turbo pedestal? Sorry, I'm a gas engine guy by trade...yes, the boots are the original orange ones...it also sounds to have a small exhaust leak somewhere. I'm wanting to do some mods to it, but have to get the liw boost issue resolved first.
Right there where the turbo meets that black pipe that goes into the intake on both sides there’s an o ring between the turbo and the “ Y pipe”
Thread Starter
|
5th Wheeling
Joined: Aug 2014
Posts: 40
Likes: 0
Thanks....under/behind the engine cover.
Lead Driver
Joined: Sep 2002
Posts: 9,498
Likes: 2,020
From: North Texas
Probably have leaking uppipes too with that mileage. Plenum sealant can fail. Turbocharger compressor wheel can also be damaged.
Next time you start it cold, do it with the hood open. Light it off and put your hands around the turbocharger collector by the uppipes. You will feel the exhaust loss easily and may see it too if engine is cold enough.
FWIW, I can hit 15psi unloaded at 3500rpm in the dually with stock injectors on a stock tune. All sealed up. Stock TP38 turbine wheel, billet comp wheel, 1.0 turbine housing.
Definitely start with that plenum oring as mentioned and I recommend the intake boot with plenum boots Riffraff sells as a kit.
Next time you start it cold, do it with the hood open. Light it off and put your hands around the turbocharger collector by the uppipes. You will feel the exhaust loss easily and may see it too if engine is cold enough.
FWIW, I can hit 15psi unloaded at 3500rpm in the dually with stock injectors on a stock tune. All sealed up. Stock TP38 turbine wheel, billet comp wheel, 1.0 turbine housing.
Definitely start with that plenum oring as mentioned and I recommend the intake boot with plenum boots Riffraff sells as a kit.
Thread
Thread Starter
Forum
Replies
Last Post
blue66tang95f150
1994.5 - 1997 7.3L Power Stroke Diesel
10
Jul 6, 2009 09:28 AM
