Philip

What journal bearing is installed in it??????

The non 360 degree bearings had problems with loading from high boost. If you do a search on that turbo you can find all sorts of info and problems with the journal bearings. All problems were from high boost app's.

Gizmo52

I'm not sure what bearing is in it but I will be checking the wastegate and air filter tonight as well as changing my fuel filter. I'm in central jersery if anyone would like to come take a look maybe a second pair of eyes would help

oliver foster

If the truck is getting higher that normal EGTs but lower PSI readings, and making lots of smoke to black out the highway as you say.
I doubt changing the fuel filter is going to make the turbo make more PSI.

mknittle

Turbo.

Gizmo52

I find it hard to believe that the turbo went bad this soon. I mean it is possible. But if get on it the turbo will Still hit about 50 psi but egts hit 1600 and there's a decent amount of smoke to me it seems like its getting fuel but suffocating. Which makes me thing my wastegate isn't closing all the way making me lose some are and slowing spool and losing some psi. At 80 in fifth I used to be at about 9 psi and quarter throttle accel would get me 18 psi easy. Now at 80 in fifth I'm at like 4-5 and doing the same pull I'm at like 10

j_martin

Lower pressure at high delivery........Air filter.

Just because you got away with over-running your turbo once doesn't mean you're entitled to doing that without trouble.

If you get normal (for you) boost at low rpms, and it falls off at higher rpm's then there's some restriction in air supply or possibly exhaust relief.

Gizmo52

That's more of what I'm thinking. The turbo should be ok but I won't know until after work. But it seems to me like the air filter. Its about a year old so its highly likely and I've always had trouble tuning my wastegate and the adjustment to delay when it opens hasn't changed anything when I adjusted it after this all started so I'm thinking maybe its hung up alittle

Gizmo52

Ok so fuel filter and taking the air filter off didn't change anything. Found an exhaust leak at the downpipe and where the manifold bolts to the head so that's fixed. And I checked my turbo that's good too. I think my wastegate was getting stuck so I adjusts that So I have to test drive and see what happens

Gizmo52

Ok so now I have a new symptom... Struggles to make boost at low rpm pretty much falls on its face. But once the rpms pick up the turbo lights and the truck takes off like a rocket! Full boost and power normal smoke once it lights off but it will only light at a higher rpm. This things driving me nuts! It explains why I have so much smoke and egts get high fast. But when the turbo lights I get my power my boost and my smoke goes away. Egts are too high by that time to be near the normal range

Nughuffer

Since the problem changed after fiddling with the waste gate I would continue in that direction. Do you have it plumbed correctly?

Gizmo52

I believe so. Its the ran the same way that it was when I got the turbo. Just had to get a longer hose. But it doesn't make sense that its lost low end power but at higher rpm it lights right up as if nothings wrong. I have to make one of those boost leak testers but is I'm still making the same amount of boost up high as before it tells me I shouldn't have a leak. Cruising at 80 in 5th I used to be around 8-10 psi. Now I'm half that.

Nughuffer

Try a different waste gate actuator

Gizmo52

So everyone was right I do have a boost leak and the turbo is bad. Its leaking where the compressor housing bolts to the center section. I spoke to a new guy at diesel auto power this time and he confirmed that the first guy was wrong when I ordered the turbo. This turbo is undersized its a 63/68/12. Now I gotta find out what big single will work and spool fast. I do not tow and its a dd/ race truck. I was thinking like a 68/71/12 but Idk if that's good for a single or quick spool. Anyone have any thoughts other than twins or compounds? trying to stay single turbo.

Philip

Sorry to hear it was the turbo.

Now the problem you have is your wanting fast spool up and high boost level. Most turbo's small enough to spool fast are not made for the boost level your wanting. The larger turbo's might handle the boost as a single. The trade off is the spool up time.

I know your not wanting twins. In this case it might be a better option.

oliver foster

To me fast spool up time on a stick shift rig is more important than 50+PSI.
A laggy turbo at every shift and tons of smoke before it spools is lame in my book for a street truck.