1228746 to 1227747, can it be done and how

[rytari]

now we hae driven some test rns with this.. idles fine strats fine but poor performance in cruise speeds.

i dont know what bin could be good to start with this 3057200r4 combo but i used amtu.

when accelerating, it sounds always like timing is too much retarted, engine is "running heavy" and you can hear from the exhaust note its retard, we turned dist 10 deg. and its way better but not good. tunerpro shows mostly from 7 to 15 deg. spark advance on hwy...

blms alter constanty, first it seemed those are mostly 120 to 128 but then all goes over 130 and then 118 and so on... first i assumed something in fuel system but then i found that in closed loop 02 sensor voltage crosscounts and goes between 120 to 900 constantly but goes lower than 0.1v sometimes..

when speed goes over 50mph 02 voltage goes only between 56 to 65 and ecm is in open loop. then again when coming to lower speeds we get 02 voltage and closed loop, still not so much power there either.

no fault codes, no knocks, over 14v voltage, wondering if something done wrong in my wiring that i cannot see myself

[ony]

you might load your bin and data log an some one on here might see a problem in the bin file.

[rytari]

i found the problem today, our brand new denso o2 sensor from rockauto was somehow bad, it kept showing maximum 235mv and somehow messing things even in open loop, we took and changed old sensor back and everything works like new :)

[EagleMark]

Keep an eye on everything for awhile! It sounds more like a contaminated O2 sensor then a bad one. There's silicone sealers etc... that are not O2 sensor safe and even if used on say a valve cover can get enough of the fumes to ruin a O2 sensor! Or things like a head gasket leaking a little anti freeze etc...

Hope it was just a bad O2 sensor though...

[rytari]

a bit strage that we didnt get any fault code from it, just too low voltage

not so much of a coolant, we still have plain water in cooling system because if something leaks and for flushing the system and changeing water daily.

no silicone sealer in this engine, just felpro gaskets, owner is going with the car to world biggest meeting, power meet in sweden next week so its better to work.

[EagleMark]

Then it probably was just a faulty O2 sensor. Not very common when you buy good parts!

I was just commenting that your symptoms are very much like a fouled O2 sensor from certain chemicals.