? about resistor
Senior Member
Joined: Feb 2002
Posts: 1,002
Likes: 1
From: Newark,CA
The resistor is mounted to the bracket that holds the intercooler water circulation pump.
The Lightning has a two stage fuel pump system that works as follows:
Up to about 1/3 throttle. the fuel pumps are supplied reduced voltage by their being grounded through the resistor. Above 1/3 throttle (actually it is above a certain TPS voltage) a relay actuates and full voltage is supplied.
The purpose of this is to slow the fuel pumps down with a corresponding drop in fuel pressure when it is not needed. This, plus the boost sensitive pressure regulator yields 38-40 psi at idle with a linear increase to 52-54 at WOT.
The Lightning has a two stage fuel pump system that works as follows:
Up to about 1/3 throttle. the fuel pumps are supplied reduced voltage by their being grounded through the resistor. Above 1/3 throttle (actually it is above a certain TPS voltage) a relay actuates and full voltage is supplied.
The purpose of this is to slow the fuel pumps down with a corresponding drop in fuel pressure when it is not needed. This, plus the boost sensitive pressure regulator yields 38-40 psi at idle with a linear increase to 52-54 at WOT.