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4 x Bosch O2 sensors fitted, the post cat on bank 2 wouldn’t thread in, so I had to take the cat out and fit it on the bench, still done now.
ECU reset and then started, ran okay, but not really much different to before, a slight uneven exhaust note. The short term fuel trims went straight down to -8% and I noticed the MAF read 6.5% at 800 rpm when warm. I suspect my MAF is over reading, as the engine was running rich.
The bolts holding the MAF in place won’t come out, my security Torx bit won’t go in correctly, I am not sure if it because the bolts are rusty or the Torx is the wrong size. I was using a security T20 with six stars. I think it might be a 5 stars?
I didn’t manage to get it out, so fitted the new air filter and disconnected the MAF, the fuel trim was much closer to 0% and the engine ran much better. A short journey proved it, running much better and fuel trims close to 0%.
I will try to get the MAF out tomorrow, then try a clean, but probably need a new MAF.
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