I am an 18 year old, who recently bought a 95' 3.0, 140,000 mile 4 wheel drive Toyota pickup. I was getting roughly 250 miles per tank, I decided to change out the plugs and install new wires. I had a problem with one of the plugs- it was frozen and very hard to remove. I didn't like the way the new plug felt going in so I used a thread chaser on it to clean up the threads. The plug went in fine after that. Once I had it all back together, my milage per tank dropped down to about 225 miles and I'm not sure why. The truck runs well. Any ideas what I might check? I have some of experience and my dad can help me out. Thanks

 

Welcome, were the plugs gapped correctly and are your wires all seated. Did you change your air filter? Try putting some injector cleaner in your tank. may help. By the way, 250 is about normal for the 3.0. How many tanks did you get the 225 with. If you got 225 after several tanks then somewhere there is a problem.

 

Tire air pressure has the biggest effect, and cold weather affects it pretty dramatically. I would check that first...

 

wow well i just recently bought a 91 pickup 3.slow and i get 225 miles per gallon....but last time i changed my spark plugs i found out one of the dumb asses at where ever the spark plugs were changed had cross-threaded it...so i had to try to manually re-bore the hole....

 

What brand of plugs and wires did you use. Toyota engines don't seem to like anything except NGK or Denso plugs, and OEM wires.

 

mine seems to love my ngk wires, and really loves my NGK Plat G power plugs, since i pulled autolites out of it, needless to say, i was pissed that someone used cheapos

 

I wish i could get 225 mile per gallon

 

x2 that would be great

 

haha im pretty sure he meant per tank...i know him personally...sometimes he gets a little confused lol.