i bought a sy yesterday it has a few mods. the cat has been removed, under full acc. its showing 18-19 lbs. it has a chip,kenny bell air intake,egr delete,msd coil,adjustable fuel pressure reg,255 pump,bigger water cooler. the truck just dont seem to have the power it should. any suggestions?
to much boost?
- Thread starter jstnperce
- Start date
Chest Rockwell
Active member
Re: to much boost?
Check engine light come on at all? Does it come on when you first turn the key on (to make sure it even works?).
Check engine light come on at all? Does it come on when you first turn the key on (to make sure it even works?).
jeepruby04
New member
Re: to much boost?
if it has the stock turbo on it without the cat the wastegate can't controll the boost, put the cat back on:2cents:
if it has the stock turbo on it without the cat the wastegate can't controll the boost, put the cat back on:2cents:
SyTyAddict
Member
Re: to much boost?
The stock wastegate doesn't flow well enough to control boost without some exhaust restriction (the cat). An aftermarket boost controller is not sufficient. Either get a cat or a jsm style downpipe.
The stock wastegate doesn't flow well enough to control boost without some exhaust restriction (the cat). An aftermarket boost controller is not sufficient. Either get a cat or a jsm style downpipe.
It's just a six
Super Member
Re: to much boost?
I would suggest installling one of these right away! http://www.alkycontrol.com/
Plus use a scan tool, Wide band O2 reader & other data logging device.
http://mysite.verizon.net/res11pgkr/vehicles/tysyclone.html
I ran with no cat,it would hold boost Ok, but would boost spike to 20 -21 psi on the shifts.
I had the wastegate adjusted to run 18-19 psi w/stock turbo.
You can loosen the tension on the wastegate actuator, ( make wastegate actuator arm longer to reduce boost)
Wastegate flapper might be binding,need to check & see it is moving nicely. If not ,use mouse milk.
I would suggest installling one of these right away! http://www.alkycontrol.com/
Plus use a scan tool, Wide band O2 reader & other data logging device.
http://mysite.verizon.net/res11pgkr/vehicles/tysyclone.html
I ran with no cat,it would hold boost Ok, but would boost spike to 20 -21 psi on the shifts.
I had the wastegate adjusted to run 18-19 psi w/stock turbo.
You can loosen the tension on the wastegate actuator, ( make wastegate actuator arm longer to reduce boost)
Wastegate flapper might be binding,need to check & see it is moving nicely. If not ,use mouse milk.
dgoodhue
BuSTeD 4.3
Re: to much boost?
I would probably turn it lower than that, maybe 11-12psi . Once you have a scan tool and you see the truck running properly with no spark retard you can slowly increase the boost from that point. If its running right, it will easily run 14-15psi.
I would probably turn it lower than that, maybe 11-12psi . Once you have a scan tool and you see the truck running properly with no spark retard you can slowly increase the boost from that point. If its running right, it will easily run 14-15psi.
Beavis
Still plays with trucks
Re: to much boost?
Thats fine for now. What chip was in it? What did it say on it? Who did you buy it from? Where are you located? You might want to try and make some local syty friends to help you get started on the right path.
Thats fine for now. What chip was in it? What did it say on it? Who did you buy it from? Where are you located? You might want to try and make some local syty friends to help you get started on the right path.