BJ70 Turbo help

[Captain Sanuk]

Hey guys. I have an 87 BJ70 with a Garrett turbo kit. Recently after returning from a trip my cruiser started to act up. Here are some of the symptoms
- Boost level jumped from 12psi to around 15~20psi upon acceleration.
- Boost isn't really a steady build up..more of an off and on if that makes sense.
- Blows a lot more black smoke than before
- pyrometer shows that the egt temp is getting hot really quickly. never got above 12 in 5th gear but now climbs to 12 fairly quickly.
- noticeable noise that wasn't there before. not really a whistle but a swooshing noise.

Just finished removing the turbo for inspection. I can't see anything noticeably wrong. I was going to clean it up and throw it back in there. what should I clean it with?

What else do I need to look at? I can't find any cracks or anything...

 

[Captain Sanuk]

Ill go over it again and check

 

[Captain Sanuk]

what should i use to clean the turbo? carb cleaner and remove the o rings?

 

[Captain Sanuk]

I think I figured it out. just reassembling everything now. one question though..I'm assuming the waste gate is supposed to be closed when off? is that right? @chaosrob

 

[Captain Sanuk]

thats what i thought. Thanks for your help!

 

[Captain Sanuk]

ok fixed the problem but after reinstalling the turbo there is a slight lack of power and boost only goes to like 5~8 psi. what did I mess up?

 

[Captain Sanuk]

@chaosrob

 

[Captain Sanuk]

yes I have the adjustable with threads. Can I adjust it with someone in the car on the throttle or what is the best way? @chaosrob

 

[Captain Sanuk]

Got it. thanks man! running the proper 12 pounds that it was before. you have been a ton of help!