My 1989 Acura engine light stay on all the time. Car is running pretty good except once in awhile it will stall when I am at a stop light. It then starts right up but it will happen again later.

No, not the oxygen sensor. A couple of things you need to make clear. What light flickers, then stays on? That can't be a sensor light, it would have to be the "check engine light" or an engine temperature light (for like when your cluster has no temperature gauge, but just the "red light").
At any rate, the sensor you changed is not the engine temp. sending unit for the instrument panel. I believe on your '89 there would be two sensors for temp. One is the CTS for the engine computer, and the other is a sending unit for the dash, probably a 1 wire connector. It could be at fault, but it wouldn't cause stalling, I do not think anyway.
If it stalls and won't restart until cooled, this is a symptom of loss of ignition (spark) caused by either a faulty coil, or faulty Ignition Control Module (the coil controller), or last a faulty Crank Position Sensor (this sensor used by computer to determine ignition spark timing). You could test if ignition is lost, by checking for spark right after the engine warms and then stalls. If you have no spark to a spark plug right after it stalls, this is the reason for stalling. Usually it is the crank sensor, rather than the ignition control module or an ignition coil. Your car has 3 coils anyway in a "coil pack", so if one coil went bad, you'd still have two good coils, but engine would only be firing on four of the six cylinders-could easily stall a car.
You should check for trouble codes whenever you have a problem. A code might have been set. Easy to check for codes on your car, just ask if you don't know how-only takes a jumper wire or even a paper clip works. good luck.

hi,

check the transmission fluid. if its not this then I would suggest taking it in to a parts store to have the codes pulled on it..jm

If it is a 3.8 engine change the crank sensor,they go bad on the 3.8 engines.

not getting air or exhaust ....its being 'choked'

take ur car for scanning, get a proper diagnosis.

Stop by local Autozone,Advance or any good auto parts store and have them do a FREE fault scan. It could be as simple as glitch due to cold weather, a stall, etc. Your OB tracks all functions and might be something that happened only once but enough to trigger sensor. It could also be early warning of part failure. When they do the scan, they come out to your car,plug in and read codes. They can print out the codes for you and reset your lights - FREE

hi,

its time for new fuel filter, new fuel injectors, spark plugs, spark plug wires, cap and rotor. the engine in the tempo is a good one and if you take care of it that car should last quite a while longer..

jm

(had a 1989 Tempo AWD)

First, has the fuel filter been changed, and is the fuel pump in good working order. Next, the engine will stall only every once and awhile, have the MAF sensor on the air intake checked. This will cause what you are having. The engine will stall, then start up right after. This sensor costs a few $$$, since only Ford has it, but they can check it, and like your mechanic says, while it's running there's nothing to find wrong. But, from experience, I know the MAF sensor will do this. Once you open the new box from Ford. it's your's. You could try and find a good used one from a scrap yard, put in on yourself, it's not hard, run the car and keep your'r with you. If you have a problem with the used one, just change over. If this works, then you can buy a new one. Good luck.

Is it an engine with a carburetor? If so, I can help with this information:

If the car stalls when it warms up, as you said, then here's a handy diagnostic article that specifically addresses this issue of yours, explaining the most probable cause of it:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Stalls_When_Hot.htm

If the car stalls when you brake/stop, as you said, then here's a handy diagnostic article that specifically addresses this issue of yours, explaining the probable cause of it:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_With_Carburetor_Stalls_When_Braking.htm

These articles should help.
Good luck!
Brad

you may want to check the ground wire for the engine; if the car just shut down it's possibly an electrical. if the ends are corroded replace.