Sr20det running lean and odd speedo problems with car running; I have searched

[pauliedrft]

Ok i just got my s14 a sr20det Zenki to the exhaust shop and , got to really fire it up for the first time, well my wide band (aem) jumps around from rich to lean then heads toward above 18.9 to 1 if i give it some throttle it riches up to around 13 to 1 AR'S, Wiring Specialties did my harness.(Yuri recommends a ecu ) Now my battery has been kinda low and i have heard that the Walbro don't like low voltage .Thus we are going to do the relay up grade this next week . My fuel pressure has been around 40 psi at idle, and with the stock fpr unplugged (and blocking the vacumm off ) we got it to 45 psi .My speedo would jump around with the tach signal but stopped when I unplugged it .(using the usdm speed sensor ).Could this be a ecu problem ? ( Just in case i ordered another ecu tonight ) Mods peak boost mani . garrett t3t4 .60 ar cold side .63 exhaust 50 trim Stock fpr God speed waste gate (not leaking done checked ) bk7re spark plugs. stock maf z32 ff fmic walbro 255lpf thermal intake gasket ( torque to correct tightness ) Aem wide band
Modified by pauliedrft at 12:38 AM 7/5/2009