crf538

iTrader: (3)

heres the problem,

i took these three logs yesterday and got three way diffrent results

yellow line is command afr and its 11.2:1
from left to right,
normal, except for the weird lean spike to 14:1 that lasts for like 3 ms

middle. this is where it got crazy, i wasnt looking at the wideband cause i was watching other things and the tune had been a little fat, so i thought i was fine. The leanest it reads is 15.7:1 under boost..but the car was clear and pulling just like normal

right. this was the last one i took, it seems to lean out in the upper rpm range for both gears.

i figure you can get the picture from the jpg, let me know if it will help and ill post the log files



the motor never skipped a beat and the tune was never changed at all, i tested my fuel pump for and hour and it was fine, regulator seems to be working fine

any ideas? bad sensor, fuel pump going, regulator hanging up?

its a bosch 420 in the tank with a magnafuel regulator, 76mm turbo and bone stock longblock, boost is only at 5 psi, 60 lb injectors 45 psi base pressure

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Route your wideband wiring as far away from the coils and ignition wires as possible.

I have seen non-resistor plugs interfere with the BS3 wideband as well making it show randomly maxed out lean.

crf538

iTrader: (3)

ive got ngl tr6's, they are resistor type right?

ill check about that wire, thanks for the tip

crf538

iTrader: (3)

so the sensor wire was pulled right over the #8 coil, hopefully that helps. im gonna sort out a few other things before i try it

crf538

iTrader: (3)

i just stumbled across this post, i had forgotten about it. turns out the fuel pump wasnt big enough so it was leaning out very quickly