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Walbro 255 fp install/ wideband install..lean idle afr!

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Old Sep 29, 2008, 06:22 PM
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Walbro 255 fp install/ wideband install..lean idle afr!

Ok, so lets see,...install went smooth, wideband and fuel pump...

ran car, checked underneath for exhaust leaks..seen none......wb is installed in tp...bout 1 oclock position.

fuel pump install went well, except when i pulled out old pump with too much force and cables came out every which way ...but got that sorted out..

ok so heres my tuning questions...background(hks 272/272) (+1/-1)

my idle afr's are goin from 14.7 - hella lean(18.4) which is waht the laptop is showing...on the aem it just shows dashes when it gets to lean.

once it gets to its lean state idle is very rough like car wants to stall....

I did do a test pull watchin the wb, and oddly enough afr's seem good, 11.2 at WOT.

ok so question 1, I did read in another thread that for idling, i should change my timing to 8 - 10 degrees...has anyone done this?...and also should i up the fuel in idle cells to richen up my idle.
Old Sep 29, 2008, 06:27 PM
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also, in one of my logs, idc still hits 90+..was thinking the fp would lower that a tad
Old Sep 29, 2008, 07:44 PM
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ttt
Old Sep 29, 2008, 08:04 PM
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Check for exhaust leaks, check base fuel pressure, & what size injectors are you running that are 90% IDC? What boost?
Old Sep 29, 2008, 08:17 PM
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stock injectors..boost about 22psi...will check for leaks
Old Sep 30, 2008, 08:31 AM
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no leaks, i did try idle timing to 10* and adding a little fuel to idle cells...seems to idle 14.7 - 15.2, occasionally will lean to - - - ..18.4 on laptop.
Old Nov 15, 2008, 03:59 AM
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sorry to bring the thread back from the dead, but were you able to fix the problem???

cuz I have the same problem, and can't seem to find anything
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