Post by
SolowKaver »
https://forums.nicoclub.com/solowkaver-u295129.html
Mon Jul 06, 2020 4:27 pm
After a cylinder head warp repair, new timing chain, new clutch, and some minor repairs I got my hardbody engine etc. all back together, installed, connected and finally started it up. It ran rough and had a very low idle at first with check engine light on. Mt scanner reported a crank position sensor code and an oxygen sensor code. I cleared them and started it back up and it ran better but not great with no check engine light. I shut it down and did the oxygen sensor test on my scan tool and it came out good on all banks etc. When I started it up after that is ran perfectly. I went on a short cruise and it ran as good as it ever did with good power and smoothness. At least I confirmed the engine appears healthy. I shut it down for the evening and next day started it up again but this time it wouldn't idle at all and ran awful. Check engine light was on again and the same codes reappeared. This time it refuses to clear the oxygen sensor code (bank 1) even after multiple attempts. I grabbed a Bosch "direct fit" replacement sensor from local parts store but it only has a single wire compared to the three wires on the original oxygen sensor. Since the sensor is nearly impossible to get out without some special socket I don't know what to do next. For now I unhooked the battery overnight to see if that might clear the code.
It has 220K miles and was running fine when the plastic radiator hose connection failed that overheated it and warped the head in February.
Is the single wire replacement oxygen sensor usable and if so which wire do you attach it to on the harness?
Could it be corrosion on the computer contacts making it act strange (it's been 4-5 months since I drove it last)?