http://conceptzperformance.com/wiki/index.php?action=history&feed=atom&title=FPCU_Bypass_%282x2%29FPCU Bypass (2x2) - Revision history2026-10-12T11:10:41ZRevision history for this page on the wikiMediaWiki 1.30.0http://conceptzperformance.com/wiki/index.php?title=FPCU_Bypass_(2x2)&diff=678&oldid=prevMaintenance script: Imported from text file2018-04-05T21:57:13Z<p>Imported from text file</p>
<p><b>New page</b></p><div>If your [[Fuel Pump Control Unit]] is giving you trouble or you suspect it is, you can bypass the it as a temporary solution to get you home if it fails while you're out and about (as it usually does), or to diagnose the FPCU as the root of a non-starting/poor-running condition. The FPCU changes voltage by limiting the ground-side of the signal, so bypassing the FPCU simply requires a direct ground connection to the line which would otherwise be limited, supplying battery voltage to the FPCU under all conditions.<br /> <br /> Please note that while many owners have driven on their cars for as long as a year with the FPCU bypassed, it should be done as a temporary solution, as this can put excess strain on the fuel pump and fuel pressure regulator.<br /> <br /> ''Original writeup from <span style="background-color: initial">[http://www.pexcom.com.au/z32cms/e107_plugins/content/content.php?content.369 Aus300ZX.com]</span>.''<br /> <br /> This article is for the 2+2 (four seater) Z32. For the 2-seater, see [[FPCU Bypass (2-Seater)]].<br /> <br />
==Bypassing==<br />
===Parts Needed===<br />
<br />
* 1 eyelet connector.<br />
* A few inches (maybe a foot) of wire.<br />
<br />
===Tools Needed===<br />
<br />
* Philips screwdriver.<br />
* 10mm socket/ratchet.<br />
* General electrical tools (scissors, crimper, soldering iron, etc).<br />
<br />
===Procedure===<br />
First, you need to gain access to the FPCU.<br /> <br />
[[File:fpcu_location.jpg|alt=fpcu_location.jpg|thumb|Nevermind that this picture shows a 2-seater >_>]]<br />
<br />
<br />
# Remove the rear seat.<br />
# Remove interior panel behind the rear passenger seat on the driver's side.<br />
# Disconnect the connector for the FPCU.<br />
# Locate the white wire.<br />
#* There are actually two white wires. One of them is naked, and the other is covered by a black sheath. We are concerned with the naked one--ignore the one with a black sheath.<br />
# Cut away some of the insulation on this white wire, and splice into the wire with your new wire. Use solder or a vampire clip.<br />
# Wrap the new splice with electrical tape or something similar.<br />
# Connect the eyelet to the other end of your new wire.<br />
# Connect the eyelet+wire to a ground. One of the nearby mounting points for the FPCU work great.<br /> [[File:fpcu_with_wire.jpg|alt=fpcu_with_wire.jpg|thumb|Click for full-size.]]<br />
# Reconnect the FPCU connector to the FPCU.<br />
# Enjoy~!<br />
<br />
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[[Category:Electronic Fuel Injection]][[Category:Fuel System]][[Category:How-To Guides]]</div>Maintenance script