Andyjr22

Hello everyone, my name is Andy and my Tacoma has little power and will not go any faster than 65. If I push the gas to accelerate it coughs and drops down at least 10mph and will not speed up again unless I let off the gas to about half way. I have changes plugs and wires air filter and fuel filter but I'm not very mechanically inclined. Any ideas and suggestions would be great Thanks a lot.

wyoming9

iTrader: (1)

Is your Clutch or Transmission slipping ??

Just how many miles??

Is your Mil on??

Are you in the habit of driving around with your gas gauge below 1/4 tank??

Andyjr22

No clutch or transmission slippage and no driving around on 1/4 tanks. 250,000 miles check engine light is on. Thanks

turkeykiller365

may not be getting enough fuel. when you plug the pedal down, you open the air intake, the computer senses that and adds go-juice. could be any number of bad sensors, throttle position, airflow, o2 etc.

Have you tried flooring it? At WOT I know the engine goes into "closed loop" mode and bypasses the o2 sensor and it would magically work again. if it were that.

Anyway, go to your local advance auto or other auto parts stores and ask to borrow a code reader. plug that sucker in your OBD2 port and it will likely tell you that one or more sensors are bad. It miiiight say that like all of your sensors are reading wrong, or that you have a misfire. In my experience, when one sensor is working wrong, a bunch will read wrong because the motor isn't running right.

IF THE CEL IS FLASHING don't drive it. That's a mechanical problem.

Read the codes, replace sensors, evaluate.

You said you replaced plugs. Were any of the plugs fouled with black soot? Especially like if one side was sooty and the other was clean that means o2 sensor.

rworegon

As said above, get the code(s) read and post them up here.
When was the timing belt last changed?

dntsdad

No offense but your truck is TELLING you the problem by triggering the MIL light and you join a forum to diagnose over the internet without even trying to pull the code and see what it's telling you?

C'mon man!

JasonYota

iTrader: (1)

Lol exactly! So many people have a problem and their check engine light is on but haven't checked why. Do people just not know what the light is for? Or think it's a trick or something?

wyoming9

iTrader: (1)

I thought when that light was on the engine was feeling neglected and needed some tender loving care .

Like a nice candle light dinner and nice warm bath seems to work in most cases .

In severe cases I have found Chocolate does wonders

MaK92-4RnR

my cousin had the same problem in her 96 4Runner and it ended up being 2 fuel injectors.

Easy to swap, takes about an hour, if you're handy.

wyoming9

iTrader: (1)

Well you came here to learn .

Just what has reading the codes revealed ??

You have a vehicle telling you where to start looking!!

cep89

Many auto parts stores have scan tools to read codes and they will do it for free.

Just_Me69

A flashing CEL does NOT mean mechanical damage. It means there is an unsafe condition for the catalytic converter. Usually too much fuel from a misfiring cylinder. Possibly too lean from low fuel pressure. Not a solution to your problem, but clearing up some information.