i was worried a bit after chris plugged in his code thingy and it said too rich on bank 1....but maybe that was because i was flooring it on the a14 cause i was late to spacychicks..
still gotta sort out that backfire whenever i change gear though![]()
That backfire is - I think - detonation of fuel-rich air on the valve seats. If she's running rich, that will probably be the case, especially after you've been running her hard.
As we discussed, the lambda is the likely culprit since it's only happening on that bank. If it was a clogged air filter or dodgy MAF, you should see it on both. Since that's the easiest fix with your open headers, that's where I would start.
And you definitely need to sort it, because it'll be causing damage to itself.