This is the fifth Taco I've owned over the years. I love these trucks. My last one was a '04 Prerunner V6, my first V6. I liked the truck and it really had some balls. But alas, i sold it to buy a 4x4.
I picked up a '99 V6 4x4 with under 95k, in great condition and was pleased as punch. But I just took it on a short trip up in the hills for the first time and have discovered that it is noticeably weaker than my '04 Prerunner, particularly on hills and passes. It maxes out at about 10 to 15 mph less.
Is that expected? Was there a significant change in engine build between the '99 and '04 V6?
is the weight difference between these two trucks really enough to account for a drastic difference in power?
Or should I be looking into something in the engine that would account for this loss of power?
I just got the service records from the delearship and they show that at the 60k service the prior owner reported sluggishness on hills and lean run condition. The MAF was changed and that improved it. But I'm not so sure it fixed it entirely.
I'm going to swap out the plugs and wires and see if that helps, but is there something else I should look into, or is it just a normal difference between the trucks? What part of the engine would breakdown and account for the disparity? The truck runs fine otherwise. It's fine on flat ground. I didn't notice all this when I test drove it because I live in a relatively flat area.
In my '04, if I wanted, I could cruise up hills at 80 mph no problem,. In this truck I have it almost floored at around 65mph, with chevy's, fords, and nissans passing me left and right. It feels more like a 4 banger to me or like I'm hauling rocks. And I can't pass people and look like the cool guy in the Toyota!!