daewoo cielo 1996 1.6 dohc idle adn cutoff problem

[anyaddress]

hi freindS
i have daewoo cielo 1996 automatic dohc 1.6 motor
the car was working fine but suddenley a problem happened
- when turning the ignition on the car turned on from first time but the voice from exhaust is not normal like ( bo-bo-bo :sound like ther is a cuttoff)
now when i driving the car for a while and when the tempertsure is is about 80 and when i push the brake pedal to deaccelrate ,the car is off WHEN RPM IS ON 1000 OR BELOW A LITTLE,some times still on with eratic idle,another thing i noticed is that whenever the car is hot and i turn wheels max to right or left it will off directley any help please

things i check:
- changed spark plugs with delco orginal ones also changed the wires
- i checked for air leak and it was fine
- checked / cleaned the IAC (IDLE AIR CONTROL VALVE)
-CHECKED TPS (CHANGED WITH ORGINAL DELCO ONE FROM 1 MONTH)
-CHECKJED WITH A SCAN TOOL 9NO ERROR CODE AT ALL)
I NOTICED THER IS SOME OIL INSIDE THE DISTERBUTOR COVER AND THE GAP WAS DIRTY COULD THIS BE THE PROBLEM THANX
AND PLEASE ANY SOLUTION FOR CAR OFF WHEN TURNING WHEEL MAX TO RIGHT OR LEFT ,SOULD A CLOSED INJECTOR CAUSE THIS ,HOW I CAN CHECK THIS THANKS