Help me AEU86, you're my only hope

[Nakilad]

(03-14-2021 02:53 PM)The Doctor Wrote:  Maybe another stupid idea, you don't have a partially blocked exhaust? If the engine can't get rid of the exhaust gasses quick enough it also might underperform and do weird things.

Like you say, bottom end shouldn't be the cause of the problem.
And i don't really know about the O2 sensor thing, what is the value you should see normally?

After 18 months or so of trying to sort this thing out, there is no such thing as a stupid idea anymore!

I put an HKS Legal Catback on it back in 2019, and the manifold has been on and off a few times recently so I don't think there is any problems there. The center muffler however, has not been replaced, so there might be an issue there. Its worth having a look at!

The narrow band O2 sensor should output around 0.5 volts, for a 14 to 1 ratio. Anything under that is lean and anything above is rich. Its not as accurate as a wide band of course, but its enough to at least get an idea of whats going on.