Before I am condemed, please give me a chance, I have searched this site and found many fixes for many of my cruisers, however this question is a little different and many symptoms may or may not be related, trying to isolate as best I can but maybe these problems are related. Stock 95 cruiser, second owner, 170k miles, factory lockers however rear isn't working, this is the least of my problems. All started about 6 months ago with I hate to say it but the 401code. Came to this site and followed recommended advice which I had searched, I took off the throttle body, looking for carbon buildup, none there, used air to check vacuum lines, no obstructions replaced rubber lines anyways, took apart the egr vacuum modulator, its clean, even the filter media is white. Ok not much else outside the vsv or egr itself could be bad, im assuming at this point. These will be replaced with toyota parts as this thread dies out. Unless something else is to blame. Interesting enough yeah its got some miles on it but it suddenly starts pinging, sounds like a diesle under part throttle or under load, did find one vacuum leak between the air filter and throttle body, repaired with too much duct tape hidden by electrical tape, this did not fix the problem, please keep in mind I have had this truck for years never had this problem with regular gasoline, have used two tanks with seafoam and premium gasoline, didn't help, now the deadly overheating issue is here, I have pulled boats, trailers you name it with never a problem maybe Ive been lucky but I doubt it, the needle had never moved before other than from cold to warm as normal, now with moderate temperature, may or may not overheat, my temp needle is very active when it does rise just past below halfway. My truck doesn't have electric fans in front just the clutch fan. Upon checking the clutch, was shot, great reading about fixing this Ive found, but really wanted to take the boat out the next day so bought what I thought was a hayden unit but turns out its made by torqflo. A little smaller than original. Started it up and there was the sweet noise of moving air. Took for a test drive, overheated. Not to the point of boiling water out, A few 1/4 mile coasts and its back at normal readings. Sounds like a bad new clutch to me, but im giving it the benefit of doubt, I have installed new toyota/mitsubisi belts and they are tight, no slipping going on and installed a new factory thermostat. Still overheats until the air conditioner turns off, so we know its hot, but thats another story I suppose. Any response will be appreciated, sorry so long, but my wife is driving it daily now, and I cant be in the passenger seat all the time, she's just not a gauge watcher. thanks for any advice and help, cheers to all.