fuel pump
Senior Member
Joined: Feb 2002
Posts: 204
Likes: 0
From: MADISON, WI
I am no expert, but this is what little I have learned. If you have an older f-150, say a 98 like mine, then your stock fuel pump has a capacity of about 90 liters / hour. While this is adequate for stock operation, with some added mods your demand for fuel will be greater than your available supply at higher speeds - say the higher end of third gear.
One solution would be to install the a pump such as the stock pump in the Lightnings. This one has capacity of about 180 liters / hour. However, I have no idea if the fuel pressure is different between the two.
As far as installing a fuel pressure regualtor that is higher than stock -- my understanding is that this is the "band aid" approach. The problem with increasing fuel pressure on these engines is that when the motor runs in closed loop operation, it begins to sense that the fuel mixture is richer. To compensate for this the computer signals the infectors to 'pulse' for a shorter length of time to lean out the air/fuel mixture. So, you could disconnect the battery say every week to erase the computer programming. Then when you hooked the battery back up, the computer would reload fresh instructions (meaning that the computer didn't yet know that the fuel pressure was higher than stock. But this would have to be continually done as the engine computer kept trying to correct for the increased fuel pressure.
I believe that the only sure way to solve that fuel delivery problem would be by installing a higher capacity fuel pump, then installing larger fuel injectors, and last but not least would be to get custom tuning done to take full advantage of the increased fuel delivery now available.
Hopefully that is of some help. I also hope that someone else will step in and correct me if I am in error in some way. I believe general idea is correct.
One solution would be to install the a pump such as the stock pump in the Lightnings. This one has capacity of about 180 liters / hour. However, I have no idea if the fuel pressure is different between the two.
As far as installing a fuel pressure regualtor that is higher than stock -- my understanding is that this is the "band aid" approach. The problem with increasing fuel pressure on these engines is that when the motor runs in closed loop operation, it begins to sense that the fuel mixture is richer. To compensate for this the computer signals the infectors to 'pulse' for a shorter length of time to lean out the air/fuel mixture. So, you could disconnect the battery say every week to erase the computer programming. Then when you hooked the battery back up, the computer would reload fresh instructions (meaning that the computer didn't yet know that the fuel pressure was higher than stock. But this would have to be continually done as the engine computer kept trying to correct for the increased fuel pressure.
I believe that the only sure way to solve that fuel delivery problem would be by installing a higher capacity fuel pump, then installing larger fuel injectors, and last but not least would be to get custom tuning done to take full advantage of the increased fuel delivery now available.
Hopefully that is of some help. I also hope that someone else will step in and correct me if I am in error in some way. I believe general idea is correct.
