2000 cadillac sls
stalls when hot outside and after driving 10 to 20 miles. will not crank until engine cools down. replaced upper and lower CPS sensors. cleaned throttle body and IAC valve.
Sounds like it maybe vapor locking. First try replacing gas cap.
Could it be the fuel pump? Also, noticed today that after engine warmed up that it seemed to shift really hard from a standing start and saw RPM's drop significantly on tach when shifting. Any possibility torque converter lock issues? Don't know if that could relate stalling when engine is hot. Couldn't get the last codes since I was stalled on the side of the road for an hour and had no paper or pen to write them down.
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