UEGO nightmare
#1
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UEGO nightmare
It has been 2 weeks and I still cannot get my WB working correctly. 1.6, MSpnp2, AEM UEGO. I have ran power from the fusebox, and the battery. I have read numerous accounts of people with conflicting stories on grounds, so I'm asking you all.. I have ran grounds from the radio area, the trunk battery ground, the battery it's self, and to the engine and engine bay, I have NOT ran it to the ECU sensor ground, yet.. Wanting experienced opinions, I keep getting erratic readings and full lean readings, it isn't the tune, The sensor tested good (gas/rag) test.. Any help appreciated, this is becoming a mini-hell.
#5
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Sounds like you just have a bad gauge. Good grounds, bad gorunds... there is always an offset you'll have to account for, but it will be consistent, not erratic as you describe.
#6
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The plot thickens. I had the gauge working correctly, after fighting with it just as I'm doing now.. The alternator went bad, so I replaced it and the battery (it was needed too) and wired the ground to the battery just as it was before replacing, and I'm back to square one with it, erratic readings.
#7
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Now grounded to ECU sensor ground, power from fusebox.
At idle: will idle at 12-13 afr for an unpredictable amount of time; and them go to 18.3 and stay
Under load: unpredictable, sometimes gets dead on readings, others it's just full lean.
At idle: will idle at 12-13 afr for an unpredictable amount of time; and them go to 18.3 and stay
Under load: unpredictable, sometimes gets dead on readings, others it's just full lean.
#9
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Yessir, I've been there too, I did find a leak about 4 inches after the o2 bung, and thought "woohoo", fixed it, caught the happies thinking it was finished, it was 12:40am, and 37° outside.. Started the car, and it read correctly (14.1-14.7) for about 90 seconds and then BAM, afr's bouncing from the 12's to full leans at idle.
#13
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Here's a question for others using megasquirt.. In fuel settings, I think it's under "injection type" or something of that nature, it is set to "4g63".. Anyone else running MS on a 1.6 NA, and have a different setting on this?
#15
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Well, I think I've figured out my problem.. I tested the sensor AGAIN.. This time it tested bad, in the towel it stayed and full rich for about 8 seconds and then shot to lean.. Tested 4 times with the same result. 4100 gauge with 4.2 sensor, and I can't seem to find one that is an exact match, I've found some that you have to cut the connector off and splice the old one on to.. Nah, so I ordered a whole new UEGO a few minutes ago, I bought the one I have now secondhand, I will let everyone know the results when it comes in. I appreciate all for the help, I'm just unsure why it tested fine the first time. Oh well.
#17
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Intermittent working part. Constant problem.. Oh well.. New WB is supposed to arrive at my shop at some point today, hopefully I'll be able to install tonight, if I can get outta here at a decent hour, sucks though because, no room in the garage, old TR6 in the way, POS.. All dependent on weather because in cold weather, I am nothing more than a little old man. 😂
#18
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New wideband went in last night, works exactly how it should, but with me tuning on the bad sensor, my tune is garbage, but the WB is actually telling me that now, I appreciate all of the input and opinions on this, very helpful. Thanks guys!