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The Terminator
Engine/Tuning
Need Help! Losing Fuel Pressure!
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<blockquote data-quote="LTZ MACH" data-source="post: 6164228" data-attributes="member: 26984"><p>Ok, a little background on the car</p><p></p><ul> <li data-xf-list-type="ul">KB 2.4 making 17 psi (and 24 psi on high boost) </li> <li data-xf-list-type="ul">60 lbs injectors </li> <li data-xf-list-type="ul">KB BAP </li> <li data-xf-list-type="ul">Fore Precision Hat </li> <li data-xf-list-type="ul">One cobra pump and one focus pump </li> <li data-xf-list-type="ul">Modified to return-style </li> <li data-xf-list-type="ul">Fuel Pressure Regulator</li> </ul><p></p><p>Well, I had the car out this weekend noticed the fuel pressure dropping off. I do not have a wideband yet, so I got a little worried. At idle, the fuel pressure is reading almost 70 psi. Rolling about 60 mph in 3rd gear, I noticed the fuel pressure is around 58 - 62 psi. I then hit it and as fast as boost came on the fuel pressure dropped. At max boost (17 psi) I noticed the fuel pressure was 38 psi. I immediately got out of it. This does not seem right to me at all. I thought the fuel pressure should be 45-50 at idle and increase with boost 1-to-1. Could someone please give me a little insight on this and hopefully give me a few things that I should check??? Some of you tuners or fuel guys should have some idea, I hope! Please let me know what you think.</p><p></p><p>LT</p></blockquote><p></p>
[QUOTE="LTZ MACH, post: 6164228, member: 26984"] Ok, a little background on the car [LIST] [*]KB 2.4 making 17 psi (and 24 psi on high boost) [*]60 lbs injectors [*]KB BAP [*]Fore Precision Hat [*]One cobra pump and one focus pump [*]Modified to return-style [*]Fuel Pressure Regulator [/LIST] Well, I had the car out this weekend noticed the fuel pressure dropping off. I do not have a wideband yet, so I got a little worried. At idle, the fuel pressure is reading almost 70 psi. Rolling about 60 mph in 3rd gear, I noticed the fuel pressure is around 58 - 62 psi. I then hit it and as fast as boost came on the fuel pressure dropped. At max boost (17 psi) I noticed the fuel pressure was 38 psi. I immediately got out of it. This does not seem right to me at all. I thought the fuel pressure should be 45-50 at idle and increase with boost 1-to-1. Could someone please give me a little insight on this and hopefully give me a few things that I should check??? Some of you tuners or fuel guys should have some idea, I hope! Please let me know what you think. LT [/QUOTE]
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Need Help! Losing Fuel Pressure!
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