 Fuel Pressure Regulator, What is the reason for dynamic control of Fuel Pressure |
 Nov 23, 2009 - 1:15 PM
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Enthusiast  Joined Aug 29, '02 From Lake Orion, MI Currently Offline Reputation: 6 (100%)  |
Why does Toyota try to keep the fuel pressure XX Kpa above intake pressure.... I am curious as we are considering replacing the Fuel Pressure Regulator but the OEM FPR has a vacuum line going to the intake... Anyone have any insight?
thanks. -------------------- -Mike
mjcoury@gmail.com Team Reynolds Style Celica Blog Celica Wiki It will take him a moment to realize that he's about to make a 180 degree turn at speed, but you will be ready for it. Brace for the g's, and fast heel-toe work. |
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Nov 23, 2009 - 6:01 PM
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Enthusiast Joined Aug 16, '03 From Bay area Currently Offline Reputation: 0 (0%) |
When you have maximum vacuum, your throttle is closed and your at idle. So your fuel pressure should be low. As you increase your throttle opening, the vacuum drops therefore you need to increase fuel pressure for your injectors. It gets to the point where you only have 15 kpa of vacuum your throttle should be wide open and your fuel pressure regulator should be fully off and your at maxium fuel pressure allowed by your fuel pump.
This post has been edited by Hanyo: Nov 23, 2009 - 6:02 PM |
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Nov 24, 2009 - 7:58 AM
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Enthusiast Joined Aug 29, '02 From Lake Orion, MI Currently Offline Reputation: 6 (100%) |
QUOTE (Hanyo @ Nov 23, 2009 - 6:01 PM)  When you have maximum vacuum, your throttle is closed and your at idle. So your fuel pressure should be low. As you increase your throttle opening, the vacuum drops therefore you need to increase fuel pressure for your injectors. It gets to the point where you only have 15 kpa of vacuum your throttle should be wide open and your fuel pressure regulator should be fully off and your at maxium fuel pressure allowed by your fuel pump. That makes sense functionally... but what is the benefit? what is the motivation for changing the fuel pressure? -------------------- -Mike
mjcoury@gmail.com Team Reynolds Style Celica Blog Celica Wiki It will take him a moment to realize that he's about to make a 180 degree turn at speed, but you will be ready for it. Brace for the g's, and fast heel-toe work. |
Posts in this topic
qatar11 Fuel Pressure Regulator Nov 23, 2009 - 1:15 PM
azian_advanced the fuel pressure being pumped through the fuel li... Nov 23, 2009 - 6:49 PM |
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