RUZN Posted May 3, 2009 Share Posted May 3, 2009 OK did 300zxt Swap Added O2 sensor Added FPR Added MAF For a couple weeks everything ran perfect. I added FPR (adjustable) because I wanted a newer unit. Adjusted to 36psi and drove fine. After a couple days it would stumble a bit but if you WOT it it would clean up and run fine again. Now weeks later I turn it on again go driving and its puffin black smoke and bogging down unless you WOT and it hits about 4000rpm then you get huge power and everythings good till you 50% throttle it and it starts to bog. So replaced plugs on side of road. Old plugs completely black foueld with soot. Drove another 100km(distance) all highway to friends.. next day started car and it was puffin the black again. So I tried adjusting fuel down to about 35psi. Soon as turbo kicked in it would sputter and unless you WOT it it would puff black smoke. So I messed with ignition timing and it ran better but still after a bit it would sputter. SO I thought it was the New FPR not reading right. I then reinstalled the Stock fpr and its even worse!! barely driveable. I have diconnected the 2 other wires from the O2 sensor and just ran the black one got home with that but whats up? TPS? MAF? it has to be to much fuel but why? ok as I siad retired with stock FPR still the same... is it the maf? with engine running just the Green light on ECU is on so Im guessing thats normal should I run it in test mode and try to count code lights? im stumped.. not sure why it would be perfect tons of power for weeks then all of a sudden be running super super rich enough to completely foul plugs in a couple minutes Quote Link to comment Share on other sites More sharing options...
RUZN Posted May 5, 2009 Author Share Posted May 5, 2009 ok so I plugged in my air regulator and adjusting ignition timing got her running but havent test drove gonna see what happens Quote Link to comment Share on other sites More sharing options...
RUZN Posted May 5, 2009 Author Share Posted May 5, 2009 Been messing around all night.. LOL got her to rev in nuetral good now. Seem to be running a tad rich but not neearrly as bad as before... Messed with ignition timing again.. got the ECU to just flash green when at 2000rpm which is what ALLDATA says is normal. Seem to get source voltage 14.35v from Heater element (which is spec when running) and the black middle wire reads .52v when ideling and goes up to about .87 when throtteling so that checks out. the Other heater element Wire from O2 seems to read .9v so from what I can find reading that is normal to but if you WOT it just around... As I have asked if anyone could lend a Note or two that would be awesome.. Just need to know exactly what pins the 3 wires from the O2 sensor go to thnx again all who have helped with my Swap.... Quote Link to comment Share on other sites More sharing options...
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