I have a 2000 Toyota Echo, Got in it today and when you press on the gas, it acts like it isn't get any fuel. It shakes and sputters. we thought it might be water in the gas so we bought HEET and injector cleaner and it didn't work.

Have you checked the injectors to see if any are leaking ?

I HAD THE SAME PROBLEM WITH MY 2000 WRANGLER. IT TURNS OUT THAT SNOW HAD BECOME PACKED AROUND THE TRANS MISSION AND THEN FROZE. I PARKED IT IN THE GARAGE WITHE A COUPLE OF HEATERS TO MELT THE ICE. I KNOW ITS MAY NOW BUT ARE YOU STILL HAVING THIS PROBLEM?

Low fuel pressure can cause this or a clogged filter, has the fuel pressure been checked? Has the fuel filter ever been changed?

try seafoam additive to your gas tank get your fuel lines and your pump checked it has a fuel filter but it is inside the tank on your pump

possibly camshaft position sensor in the distributor, or weak fuel fump starts acting up when warm, or throttle position sensor. heat has a effect on sensors and electrical components in some weird and hard to find ways.

jecters

It's in the gas tank. Found this on another site so all credit to the original poster. Anyways, here's the link that has very detailed instructions on how to replace it.
http://wiki.answers.com/Q/How_do_you_replace_the_fuel_filter_located_on_a_2000_Toyota_Echo

COLD WEATHER IF YOU HAVE WATER IN FUEL.ENGINE WILL SHAKE AND SPUTTER.TRANSMISSION WILL ACT UP IN COLD WEATHER.CHECK COOLANT LEVEL AND TRANSMISSION FLUID LEVEL WHEN YOU FIRST START VECHICLE.LET VECHICLE IDLE UNTIL IT GET WARMED UP.THAT SHOULD HELP.FILL UP FUEL TANK PUT A BOTTLE OF FUEL INJECTOR CLEANER AND GAS TREATMENT IN TANK SEE IF IT HELPS.

The first thing that needs to be done when experiencing shaking at certain speeds is have the wheels balanced.

This is a simple procedure that any repair shop should be able to do for a reasonable price.

Try that and check back if the problem continues.

Good luck.

The check engine light is telling you the computer is detecting a problem from one or several sensors. You will need to have someone use a scanner to pull the codes. Places like auto zone offer this service for free(they want to sell you parts). Once you find out the codes then you can try and determine what the problem is. Could be anything from a bad plug wire to a plugged fuel filter.