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Cobra Forums
The Terminator
Engine/Tuning
Need help with fuel problem.
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<blockquote data-quote="cj428mach" data-source="post: 15277791" data-attributes="member: 142081"><p>Most recommend maxing out the BAP setting. The dial is deceiving as it really has no effect on how rich or lean the car is....well unless you're actually running out of fuel. The way the returnless system works is the ecm monitors the FRPS and fuel pump voltage to get the proper output to maintain the necessary pressure. </p><p></p><p>With the BAP there is more voltage going to the pumps so the output is higher but the ecm can still modulate the pump output by controlling the pressure. So if the BAP is maxed out the PCM just lowers voltage until it maintains the same pressure. The BAP helps when you need more fuel the PCM can tell the pumps to flow more fuel and because the voltage is higher the pumps flow more and you get more flow to maintain the pressure. </p><p></p><p>I would log your MAF, and FRPS and FPDC and see whats going on.</p></blockquote><p></p>
[QUOTE="cj428mach, post: 15277791, member: 142081"] Most recommend maxing out the BAP setting. The dial is deceiving as it really has no effect on how rich or lean the car is....well unless you're actually running out of fuel. The way the returnless system works is the ecm monitors the FRPS and fuel pump voltage to get the proper output to maintain the necessary pressure. With the BAP there is more voltage going to the pumps so the output is higher but the ecm can still modulate the pump output by controlling the pressure. So if the BAP is maxed out the PCM just lowers voltage until it maintains the same pressure. The BAP helps when you need more fuel the PCM can tell the pumps to flow more fuel and because the voltage is higher the pumps flow more and you get more flow to maintain the pressure. I would log your MAF, and FRPS and FPDC and see whats going on. [/QUOTE]
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The Terminator
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Need help with fuel problem.
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