todd5854
03-05-2013, 06:34 AM
Sorry for general title, I want anyone searching for this to easily find it. I've been doing a lot of looking around before I removed my vacuum/emissions, and from what I've read, and how she's running after deleting those lines, I made the right choice!
1994 240sx s13 with stock KA24DE
NOT throwing codes, NO check engine light
Deleted and welded shut:
EGR valve and pump, both tubes welded shut
PCV valves on the bottom of the intake runners
EGR block-off plate was installed
Carbon canister removed
Idle is perfectly smooth. My car still has stock exhaust, when I'm sitting at a red light you can't hear or feel anything at all. Throttle response is amazing, and I feel like I gained some low-end power. Nothing super awesome, but definitely noticeable. Maybe I just had a vacuum leak, who knows.
Haha I can now change my knock sensor without removing the intake manifold!
IMPORTANT
Make sure you leave your gas tank vent line open (comes off the carbon canister) so the gas tank can vent. Without that you have a serious problem on your hands.
Diagnosing vacuum problems is now super-easy. The hard line from near the IACV (back of manifold near brake vacuum) goes straight to fuel pressure regulator, I only have the large vacuum line on the intake pipe hooked up, because the IACV requires it. The small one next to it has been sealed shut. The only other vacuum I have left is for the throttle body.
PCV now vents to atmosphere, instead of recirculating through the intake.
I modified the KA24DE FSM vacuum diagram as per my setup, if anyone is interested in seeing that.
Fuel economy? Couldn't tell you, my head gasket blew the next day so she's sitting :naw:
I've always seen people ask questions about what it does, what happens when you remove it, etc..
1994 240sx s13 with stock KA24DE
NOT throwing codes, NO check engine light
Deleted and welded shut:
EGR valve and pump, both tubes welded shut
PCV valves on the bottom of the intake runners
EGR block-off plate was installed
Carbon canister removed
Idle is perfectly smooth. My car still has stock exhaust, when I'm sitting at a red light you can't hear or feel anything at all. Throttle response is amazing, and I feel like I gained some low-end power. Nothing super awesome, but definitely noticeable. Maybe I just had a vacuum leak, who knows.
Haha I can now change my knock sensor without removing the intake manifold!
IMPORTANT
Make sure you leave your gas tank vent line open (comes off the carbon canister) so the gas tank can vent. Without that you have a serious problem on your hands.
Diagnosing vacuum problems is now super-easy. The hard line from near the IACV (back of manifold near brake vacuum) goes straight to fuel pressure regulator, I only have the large vacuum line on the intake pipe hooked up, because the IACV requires it. The small one next to it has been sealed shut. The only other vacuum I have left is for the throttle body.
PCV now vents to atmosphere, instead of recirculating through the intake.
I modified the KA24DE FSM vacuum diagram as per my setup, if anyone is interested in seeing that.
Fuel economy? Couldn't tell you, my head gasket blew the next day so she's sitting :naw:
I've always seen people ask questions about what it does, what happens when you remove it, etc..