I have a 2006 lance 149cc engine that constantly wont start. I have replaced the carb, fuel filter and still takes for ever to get started. What is the problem so i can fix it ?

First, I'm not a Toyota representative.
* Take your car to the nearest Toyota dealer/shop.

*** Following is for information only.***
* Starting Fluid???? Did you pour this in the tank or carb? (make a difference)
* Did you read and follow the instructions for this "Starting Fluid"
* There are gas additives to improve performance, clean engine, increase octane, stabilize ethanol, etc.
* I've never heard of "starting fluid" that is poured into tank. (though I could be wrong. Maybe some "newfangled" thing from China? (hey, I'm Chinese so I can say that.)
* Most Engine Cold starts are in spray form usually called "Carb Cleaner", Cold Engine start spray, Or generic Acetone spray. Remove the air filter and couple of sprays in carb tunnel then start car. May need to do it several times in real cold weather.
* If this is not the same stuff you used then you will need to take care down to shop to drain tank, replace fuel filter, clean out carb.
* Be careful and read instructions or ask the counter guy for help.
Aloha, ukeboy57

Probably fuel pressure issue. Check for leaks, dirty filter, low fuel pressure could indicate bad fuel pump. Normally, a float would cause flooding, but a clogged jet could cause a lean / no start issue. Try some gumout fuel cleaner and a gumout spray clean of the carb and linkages before you get to far into a part issue.

It's always bad to let the fuel system dig into whatever lies at the bottom of the tank. You have fuel.. or something.. getting to the motor but I suspect that the carburation system has got some serious issues.
Not being inclined to mess with these, I would give call my favorite mechanic up and take it from there. If you are mechanically inclined, you might entertain getting a carb rebulid kit.
If this machine is fuel injected the injectors or some other part of the system may be clogged.
Good luck.

you have probably got a blockage in either the fuel filter or carb,so first check filter,if ok check carb.take fuel line of carb turn engine over see if fuel comes out if it does then filter ok if not change filter,

what year? if it a 350. take 12 volts directly to the distributor. if its cranking then dump some fuel down the carb. that should make it run for a little. if you are getting spark you are not getting fuel if it won't start

If your check engine light is on use DB2 monitor to check code, replace sensor indicated. Check fuel filter if more than 30,000 miles, Could be ignition problem or weak fuel pump

check the distribor cap and rotor buttom, sounds like a cracked cap, hope to help

From the info you provided, it seems like it is not getting constant supply of fuel. I think that don't have a carburator. It has a TBI(Throttle Body Injector. You should hear a faint humming noise at the back coming from within the fuel tank when you turn the key on. Thats the fuel pump. Your fuel pump may have gone out.

With a new plug and fresh gas it should start. Check to make sure there isn't a kill switch turned off or that the gas petcock from the tank to the carb is on.

How did you check the fuel filter? Disconnecting it from the fuel line that goes to the carb is the best way, making sure the gas is turned on under the tank. Bleed off a little gas into a can or something just to make sure the filter isn't plugged.

The last thing I'd do is take off the air filter and spray a little starting fluid in the carb. It may start and run several times if there is old gas in there somewhere. Remember the bowl on the carb is probably still full of old gas. After some fresh fuel reaches the plug it should start and continue to run.

(You might drain the bowl on the carb of ols gas before you go any further)

Good luck!

Sirwriter

If it sat for two years, you probably have varnish and gum buildup in the carb. You'll need to take the bowl off the carb and clean it with carb cleaner. You'll also need to spray the cleaner around the linkages and the jets inside. Be very careful taking apart the carb so you don't lose the float needle.