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Turbo maxing out at 16psi

1K views 5 replies 5 participants last post by  ykdave 
#1 ·
I have a 1998 12v 2wd auto. truck is stock. It is a CA truck so it does have an EGR on it. I put a boost gauge on and realized i only got 16 psi MAX. I have searched for average psi and found that they are between 21-23psi. I am only asking because i would like to know if maybe the CA trucks have a lower psi rating? if not, what could i be looking for. Thanks.
 
#2 ·
You have a leak. I have an EGR motor and get 35psi pretty easy with a forward fuel plate and boost elbow.
Do a search on boost air leaks.....has been a bunch of stuff on that, even very recently.
 
#3 ·
Check your Intercooler boots, especially on the lower left and right sides.

Check around your Intercooler for any visible damage.

You can pressurize the the entire system and see where the air is coming from.

You've done the simple stuff, checked the turbo for shaft play and such?
 
#4 ·
The turbo waste gate could be stuck also. Yet, that will be covered in the same articles in searching for a non working boost condition....;)
 
#5 ·
You might not have any problem all. Could be you haven't haven't loaded the engine down enough where it needs more boost.
Especially true with a stock truck with choked down fueling.
Try flooring it on a good hill and see what the psi is.
 
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