i just got back from vacation after letting my 95 4runner sit for 2 weeks, my moms alternator went out so she had to use my rig once or twice, so after i got home i did my first ever tune up. cap, rotor, and wires as well as a new o2 sensor. the plugs still looked okay and fairly new so i didn’t worry about replacing them. my problem is, however, that i feel like maybe i did something wrong, because before i went on vacation it wouldn’t vibrate so badly rolling down the freeway. i do notice a slight lack in power as well, it doesn’t get up and go quite as well as it used to. i’ve heard about it possibly being the rear U-joint since it only vibrates when i’m on the gas and it doesn’t do anything when i’m idling and giving throttle. this would be my first U-joint replacement if it is indeed that and what tools would i need? or could i have done something wrong during the tune up? thanks.

 

Recheck you have the plug wire order correct and that they are all seated on the sparkplug and cap all the way

 

so i put my vehicle into reverse then drive a few times and it makes a clunk only when put in drive. i put it in neutral and wiggled my driveshaft, to no surprise it’s my rear u joint failing

 

If you replace the u-joints and it's still doing it - it's the slip link. I need greasing every 6 months. In mine it was the cause for the failing u-joint in the rear. Replaced it like three times before I figured it out.