[jcp123]

So, this is on my Echo. It's a 2000, auto trans 260k miles. A brief history, my in-laws bought the car new and put the first 200k on it in about 8 years. It became my wife's and then mine. Maintenance was horribly neglected, it ran very poorly. Among the things I did was to clean the MAF. It was dirty and popping a p0171, which that and a set of plugs cured. The car runs very, very well now, and were it not for my ultragauge, I wouldn't know anything was wrong at all.

I have noticed a problem with my fuel trims, which my UltraGauge supports on this vehicle. At idle I have good values, +3 or so on my long term. However, as the revs rise, so do my long term trims. At freeway speed, it's running anywhere from +13 to +17. I know just enough to be dangerous, and it looks like a classic MAF problem. There are no codes and as mentioned, the car runs very, very well. Should I attempt a more thorough MAF cleaning, or snag a new Denso MAF for $75? The car is all beat to hell so I'd like to avoid spending $75...