[barron64]

Update on the lame Tacoma. After trying the different MAF sensor with no success I got to thinking about what else controls the a/f mixture. The O2 sensor is the next piece in the puzzle. I spoke to a Toyota tech and he said the problem the see every so often was an O2 sensor that worked but the heater circuit would be bad. This does not trip the cel but the vehicle does not run correctly. The O2 was the original one with 215,000 miles so I figured what the heck...Only about $120! Anyway, big improvement in driveability. No more lean feeling/stumbling while cold. Still Lame though. Next, chasing the timing retard problem. Previous owner told me he fooled around with the throttle stop to get idle speed up. This told me the TPS is probably out of adj. I pulled the throttle body for cleaning and ease of adj. It was filthy and was definately out of adj. Set the TPS as per the factory manual and re-installed. Big improvement in torque and throttle response. Apparantly if the TPS is out of adj, it has a big influence on the timing curve the engine follows. Still not near as mid-range strong as my 22re in my 86 model but at least it is now acceptable. This engine may produce more hp and torque than a strong 22re... But a 22re will out perform it everywhere below 4000 rpms!