I bought my 93 toyota 2wd pickup 3 yrs ago and have never had a problem with it, only replaced the radiator when it cracked. When I was driving home one day, a thunderstorm hit and I drove under an overpass and onto the curb to avoid the hail, going through about 2 foot of water to do so. Since then, my truck has been hesitating under load, like it peaks out a 3k rmp and then rockets off after about 5 seconds. After about 10 mins of driving it runs like a dream. Also when I start it up warm it will idle rough at about 500 rpm, acting like a miss, but will quit after a couple minutes and idle at a smooth 800. I originally thought the fuel filter so I changed it, but it still does this. I'm at wits end and dont know where to start to look. PLEASE HELP!!!

 

you prob got hydro lock

 

wouldnt hydrolock stop it dead in its tracks?

I pulled the plugs and didnt see any obvious signs of hydrolock, and ive been driving it for about 3 weeks like this. Im just getting sick of it hesitating and not having any power.

 

Check the cap and rotor for water. Its not hydro locked.

 

I agree with Teuf but would also check the plug wires and see if you have one with a crack or the coil wire(run it at night and look for blue spark flying from the wires) and it/they are letting spark escape plus a full tune up if you have not done anything in 3 years would be a good idea no matter what.

 

I pulled the cap and had a little moisture inside, also the o-ring was bad, sprayed it full of wd-40 and put cap back on, still hesitation at start of driving. will check wires for sparks tomorrow night.

 

I would check the o2 sensor and its plug you might be getting a false read from corosion or a bad o2.

 

This is probably your problem, view thread below and clean/fix your COR unit next to the glove compartment. YOU WILL BE AMAZED!

Thread by: mattaway https://www.yotatech.com/forums/f116...-fixed-179998/

 

i ran a quick diagnostic and got codes 24 and 31, both pointing at the VAF and the IAT. I guess thats the problem.

 

Last time, try the COR as I posted earlier.

 

And what does the CORE do. I have never heard it mentioned before regarding hesitation Etc.

 

Its an electrical relay for the fuel pump. They get corroded, then on a muggy or rainy day they short out; causing bucking and stalling. The symptoms mimic bad fuel pump or a clogged filter. If you have a 22re, Its worth checking out to prevent the problem.

 

And its under the glove box, beside the glove box, below the glove box? I'll look today.

 

I pulled it out and it looked brand new, both inside and out.

 

Check out mattaway post below,
Thread by: mattaway https://www.yotatech.com/forums/f116...-fixed-179998/

 

you pull the glovebox, and its on the right near the top, its pretty obvious. mine had 2 fuses with it too.

on another note, i pulled open the VAF meter and there were 2 contacts touching, i fixed those and reset the ecm and its not giving anymore codes, but still hesitates.

 

bump....I am out of ideas

 

mine does the exact same thing when i go through the car wash,drive it awhile,shut it off and start it again and its gone,WTH!!!.