Could cloaged fuel injectors cause fuel to leak out of throttle body on a 97 buick lesabre ?

Should be under the thermostat housing where the radiator hose connects under the throttle body. This is on the driver's side of the engine near the exhaust cross-over pipe.

Is fuel odor under hood also/ test for fuel leaks or seeps in evap. and feed and return lines. Also injector can seep (wet or damp around injector body)

Have you checked the catalytic converter? After 20 years they do pug up causing some of the problems you describe

The first thing I would do is to check and see if the gasket between the throttle body and the intake air plenum isn't split. I've taken these apart before and found the gasket to be split in one or more places, causing a vacuum leak, thus causing un-metered air to enter the system (hence causing bad fuel economy) and also the IAC cannot compensate for it because even if the pintle is set all the way in to its seat, there is still an "artificial" air bleed there. You also may want to check your Throttle Position Sensor as well. At idle, you should read no more than about .5 Volts. (+-.1V) This would be easier to check if you have a scanner or if you go to say, Auto Zone or Advance Auto Parts or Napa, where they can plug one in, check the fault codes, and see if the TPS is the culpret. (Or anything else for that matter.) Also, check for any other vacuum leaks. Look for dry-rotted hoses, etc., around the intake plenum. To check for hard to find leaks, use a little propane torch (DO NOT light it) and turn it on until the gas just kind of trickles out. Next, run the end of the torch around the hard to find, suspected vacuum leaks. If one should show up, you'll suddenly hear the engine smooth out. There, you've found your problem.

I hope these tips help to get you going again in a car whose engine isn't idling erratically and much better fuel mileage! :)

-Jason

try replacing the idle control sensor,,located at the throttle body,,a round silver cylinder just before your intake,but have you had the codes read? if not,,this is a good guessatiment and thats all. hope this helps!!

Fuel injectors go bad on these engines, you can find re manned ones for 30 bucks. If you have an engine light on get that read. Change your coil/wires/plugs also. Is the lower intake manifold gasket leaking coolant yet? You may want to get that replaced also. Check the TPS too (throttle positioning sensor) those will also cause your engine to act up

sounds like the egr valve is sticking. remove and clean. or a vacuum hose is leaking

check your map sensor as well as the range on your tps/ throttle postion sensor and your throttle body gaskets sometimes that engine will get a air leak that corrupts the vacumn necessary to operate the fuel rail which in turn will shut the fuel off at a idle

if voltage is on both sides of the injector your computer is bad if only on one side try a crankshaft position sensor its very common with these cars.