vacuum hose simplification,any diagrams?
10-07-02, 08:27 PM
#2
5yr member, joined 2001
Just remember, when you do the simplification you will be elimating your ACV, DT, EGR, and AWS. You will need block-off plates. If you still have your main cat, then you will need to find some way to connect your airpump and a one-way air valve to your main cat.
Here is the link to THE turbo simplification.
http://www.rx7turboturbo.com/robrobi...lification.htm
As always, you will also need the colored vacuum hose diagram of the original setup, although it's just for reference. I have the GOOD version hosted here:
http://www.rpi.edu/~skrzyj/rx7/93vachosescolor.jpg
DON'T FORGET TO LEAVE THE FUEL PRESSURE REGULATOR SOLENOID IN-TACT IF YOU DON'T HAVE AN AFTERMARKET FUEL SYSTEM. It's solenoid (A) in the complete diagram. Under the hood, it's the one with the orange electrical connector, closest to the firewall on the solenoid rack.
Here is the link to THE turbo simplification.
http://www.rx7turboturbo.com/robrobi...lification.htm
As always, you will also need the colored vacuum hose diagram of the original setup, although it's just for reference. I have the GOOD version hosted here:
http://www.rpi.edu/~skrzyj/rx7/93vachosescolor.jpg
DON'T FORGET TO LEAVE THE FUEL PRESSURE REGULATOR SOLENOID IN-TACT IF YOU DON'T HAVE AN AFTERMARKET FUEL SYSTEM. It's solenoid (A) in the complete diagram. Under the hood, it's the one with the orange electrical connector, closest to the firewall on the solenoid rack.
10-07-02, 09:07 PM
#3
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Why does the fuel pressure solenoid need to be there? I thought it only worked on startup to stop vacuum from reaching the regulator. Any problems if it is removed?
10-07-02, 09:32 PM
#4
5yr member, joined 2001
Originally posted by crazyz007
Why does the fuel pressure solenoid need to be there? I thought it only worked on startup to stop vacuum from reaching the regulator. Any problems if it is removed?
Why does the fuel pressure solenoid need to be there? I thought it only worked on startup to stop vacuum from reaching the regulator. Any problems if it is removed?
08-09-03, 06:34 PM
#5
I'm in process of doing the simplification.. I have all the block off plates.. i think??
I have a question for you "JONSKI", what is "DT"??
I can't think of what that is.. if you could let me know I would greatly appreciated.. i need to finish my simplification by tomorrow night.. I have all the rats nest and EGR, ACV, and air pump line blocked off..
Thanks!
PHIL
I have a question for you "JONSKI", what is "DT"??
I can't think of what that is.. if you could let me know I would greatly appreciated.. i need to finish my simplification by tomorrow night.. I have all the rats nest and EGR, ACV, and air pump line blocked off..
Thanks!
PHIL
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08-10-03, 12:18 AM
#8
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JONSKI, you may have a point about running rich, can you elaborate as to the reasons.
I just did the simplification and eliminated that solenoid. I think I have an over-rich problem at idle.
I just did the simplification and eliminated that solenoid. I think I have an over-rich problem at idle.
08-10-03, 12:28 AM
#9
5yr member, joined 2001
When you eliminated the solenoid, did you connect the FPR (Fuel Pressure Regulator) to the angled nipple on the LIM (Lower Intake Manifold)? This is the correct way to eliminate the FPR solenoid.
The FPR uses the air vacuum and pressure in the LIM to decrease or increase fuel pressure. If your FPR has no vacuum tubing (vented to the atmosphere) then you will be running rich, because your ECU expects the FPR to decrease fuel pressure and therefore the ECU increases the injector duty. Under boost, you will run leaner than normal and risk detonation, because your ECU expects the FPR to increase fuel pressure and your ECU again adjusts the injector duty to compensate for this.
The FPR uses the air vacuum and pressure in the LIM to decrease or increase fuel pressure. If your FPR has no vacuum tubing (vented to the atmosphere) then you will be running rich, because your ECU expects the FPR to decrease fuel pressure and therefore the ECU increases the injector duty. Under boost, you will run leaner than normal and risk detonation, because your ECU expects the FPR to increase fuel pressure and your ECU again adjusts the injector duty to compensate for this.
08-10-03, 11:26 AM
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Originally posted by JONSKI
When you eliminated the solenoid, did you connect the FPR (Fuel Pressure Regulator) to the angled nipple on the LIM (Lower Intake Manifold)? This is the correct way to eliminate the FPR solenoid.
The FPR uses the air vacuum and pressure in the LIM to decrease or increase fuel pressure. If your FPR has no vacuum tubing (vented to the atmosphere) then you will be running rich, because your ECU expects the FPR to decrease fuel pressure and therefore the ECU increases the injector duty. Under boost, you will run leaner than normal and risk detonation, because your ECU expects the FPR to increase fuel pressure and your ECU again adjusts the injector duty to compensate for this.
When you eliminated the solenoid, did you connect the FPR (Fuel Pressure Regulator) to the angled nipple on the LIM (Lower Intake Manifold)? This is the correct way to eliminate the FPR solenoid.
The FPR uses the air vacuum and pressure in the LIM to decrease or increase fuel pressure. If your FPR has no vacuum tubing (vented to the atmosphere) then you will be running rich, because your ECU expects the FPR to decrease fuel pressure and therefore the ECU increases the injector duty. Under boost, you will run leaner than normal and risk detonation, because your ECU expects the FPR to increase fuel pressure and your ECU again adjusts the injector duty to compensate for this.
I just believe I am way too rich at idle now. Was curious what additional insight you had.
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