The engine just cuts off when slowing down at trafic light or when braking. it restarts without any problem. I noticed that the rpm needle acts weardly when slowing down, kind of doing few jumps before setteling on a low rpm ... thank you for your help
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Re: engine stopping at when slowing down
Check and make sure that there is no vacum leaks, such as any broken hoses especially the duct hose from the throttle to the mass air flow sensor , other tha that you have a defective idle control valve
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If you have the foot on the brake when stopping and it stalls , try slowing down and stopping on the hand brake to see if the engine stalls . If it doesn't stall on the hand brake then I would suspect a leak in the brake booster that is affecting the engine by letting air into the manifold through the activated booster. If there is no difference have the fault codes read as there may be a missing/ faulty vacuum line connected to a actuator in the gear box.
This sounds like your cooling fan is not running. If you were to stop too long with with the engine idling it would overheat the engine. I hate to be the bearer of bad news but this is a very serious issue. I can have a number of causes, like bad cooling motor, bad wiring or conectors, bad relay, open fuse, etc. Please have it diagnosed and repared before it overheats the engine and possibly damages the engine. If you are stopped in trafic you can place the transmission in neutral and shut off the engine. When trafic restarts you can restart the engine and place the transmission in drive again and continue. I hope this helps.
it sounds like it is starving for fuel, the fuel filter may be clogging up. when a fuel filter gets dirty and cuts some of the flow of fuel, it will stall out at stops. because the engine does not have the proper amount of fuel to keep it running. have a good day !
Does the vehicle restart and die when you put it in gear. If answer is yes then you need a torque converter clutch solenoid (TCC) or a brake light switch. The brake light switch cancels the TCC at a slow down or stop.. If it doesn't cancel it you will stall out. If your vehicle restarts and dies once you put it in gear then its the TCC. If none of these symptons fit your vehicle get back to me .
Are you quite sure it is not overheating? Your mention of heavy traffic, ie. stop and go, would tell me that your radiator fans are not working. I had a car with bum electric radiator fans. It worked fine if it was moving a lot. But in slow traffic, it would get warm enough to have a vapor lock or something without setting the engine-hot light.